Skip to content
https://oreilly.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
66
GRADE
D
FIX
5
REVIEW
1
PASS
9
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
35
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
87
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

3.29 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

6.40 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

6.72 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.033

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

6.64 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

26.90 s

Page Load Progression

657 ms
1.3 s
2.0 s
2.6 s
3.3 s
3.9 s
4.6 s
5.3 s
Checks
17
9 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
5.2 MB transferred, 118 requests
FIX
5.2 MB transferred, 118 requests
Critical::
Page weighs 18.8 MB (5.2 MB transferred)
Warning::
JavaScript is 2.4 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.4 MB
Warning::
Images are 2.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.3 MB
Warning::
118 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.1 g CO2 per page load
5.2 MB / 2.4 MB budget
5.2 MB transferred
118 requests
1.1 g CO2 per page load
JavaScript 2.4 MiB 47%
Images 2.3 MiB 43%
Fonts 169.6 KiB 3%
Other 157.3 KiB 3%
Other 115.9 KiB 2%
HTML 42.5 KiB 1%
CSS 31.3 KiB 1%
Other 9.8 KiB 0%
Other 3.3 KiB 0%
0 2.4 MB 4.9 MB
Over budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (5.2 MiB of 5.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
17393ms total JS execution
FIX
17393ms total JS execution
Warning::
https://www.oreilly.com/: 8803ms CPU time
Warning::
https://cdnapisec.kaltura.com/html5/html5lib/v2.86...: 3137ms CPU time
Warning::
Unattributable: 1299ms CPU time
Warning::
https://cdnapisec.kaltura.com/html5/html5lib/v2.86...: 920ms CPU time
Warning::
https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0r...: 777ms CPU time
Warning::
Third-party scripts: 17393ms (100% of total)

Main Thread Breakdown

Other 51% Script Evaluation 35% Script Parsing & Compilation 9%
ScriptTotalScriptingParse/CompileParty
https://www.oreilly.com/8803ms268ms13ms3rd
https://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260421T130225Z&*&protocol=https&wid=_16816923137ms2132ms824ms3rd
Unattributable1299ms421ms0ms3rd
https://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260419T085420Z&*&protocol=https&wid=_1681692920ms648ms219ms3rd
https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0rEVzzE/MmwmZA/FCQ/hVwwjR1EPAg?v=4e12f83c-0b79-f2be-9165-13a7d6500214777ms679ms37ms3rd
https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/uXrEVzLwhDD0Nr/aE0gZA/Cxp/8IWwsPSEB764ms702ms47ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5P4V6Z415ms346ms54ms3rd
https://cdn.cookielaw.org/scripttemplates/202408.1.0/otBannerSdk.js259ms162ms41ms3rd
https://www.googletagmanager.com/gtag/js?id=G-092EL089CH&cx=c&gtm=4e64h1249ms200ms47ms3rd
https://cdnapisec.kaltura.com/html5/html5lib/v2.86/mwEmbedFrame.php?&wid=_1681692&uiconf_id=47268383&cache_st=1666285022&entry_id=1_nrvzd3wa&flashvars[thumbnailUrl]=https%3A%2F%2Fcdn.oreillystatic.com%2Foreilly%2Fimages%2Fhome-video-testimonial-thumb1-711x400-20221020.jpg&flashvars[autoMute]=false&flashvars[autoPlay]=false&flashvars[controlBarContainer.plugin]=false&playerId=kaltura_player_1666285022&forceMobileHTML5=true&urid=2.86&protocol=https&callback=mwi_kalturaplayer16662850220195ms119ms59ms3rd

Showing top 10 of 15 scripts

F
JS Bundles
Action
26 scripts, 2.2 MB unused
FIX
26 scripts, 2.2 MB unused
Warning::
https://cdnapisec.kaltura.com/html5/html5lib/v2.86...: 479 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdnapisec.kaltura.com/html5/html5lib/v2.86...: 479 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdnapisec.kaltura.com/html5/html5lib/v2.86...: 479 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdnapisec.kaltura.com/html5/html5lib/v2.86...: 479 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-092E...: 77 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 2.2 MB
2238 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260419T085420Z&*&protocol=https&wid=_1681692689 KB479 KB (70%)✓3rd
https://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260421T130225Z&*&protocol=https&wid=_16816920 KB479 KB (70%)✓3rd
https://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260421T130225Z&*&protocol=https&wid=_16816920 KB479 KB (70%)✓3rd
https://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260421T130225Z&*&protocol=https&wid=_1681692689 KB479 KB (70%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-092EL089CH&cx=c&gtm=4e64h1169 KB77 KB (45%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5P4V6Z172 KB75 KB (44%)✓3rd
https://cdn.cookielaw.org/scripttemplates/202408.1.0/otBannerSdk.js110 KB58 KB (53%)✓3rd
https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/uXrEVzLwhDD0Nr/aE0gZA/Cxp/8IWwsPSEB172 KB36 KB (21%)✓3rd
https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0rEVzzE/MmwmZA/FCQ/hVwwjR1EPAg?v=4e12f83c-0b79-f2be-9165-13a7d6500214153 KB32 KB (21%)✓3rd
https://cdn.oreillystatic.com/ajax/libs/jquery/3.3.1/jquery.min.js30 KB22 KB (75%)✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

F
Page Weight Inventory
Action
118 resources · 5.2 MB · 2.2 MB savings available
FIX
118 resources · 5.2 MB · 2.2 MB savings available
Warning::
Page weight 4.2 MB over 1MB target
Got: 5.2 MB Expected: ≤ 1 MB
Info::
~2.2 MB of savings available
Warning::
117 third-party resources (100% of weight)
Info::
4 resources over 200KB
118 resources · 5.2 MiB · 117 third-party 4.2 MiB over 1MB target
JavaScript 47% · 2.5 MiB
Image 43% · 2.3 MiB
Font 3% · 169.6 KiB
Other 3% · 157.1 KiB
Media 2% · 115.9 KiB
Document 1% · 42.8 KiB
CSS 1% · 35.6 KiB

~2.2 MiB of savings available

Remove unused JavaScript: 2.2 MiB
C
Image Optimization
Action
54 images, 0 KB saveable
REVIEW
54 images, 0 KB saveable
Warning::
https://cdn.oreillystatic.com/oreilly/logos/logo_a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.oreillystatic.com/oreilly/logos/logo_b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.oreillystatic.com/oreilly/images/logo_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.oreillystatic.com/oreilly/images/googl... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.oreillystatic.com/oreilly/images/logo_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.oreillystatic.com/oreilly/logos/logo_t... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.oreillystatic.com/oreilly/images/roku-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.oreillystatic.com/images/sitewide-head... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.oreillystatic.com/oreilly/images/app-s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.oreillystatic.com/oreilly/images/amazo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.oreillystatic.com/oreilly/images/logo_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.oreillystatic.com/oreilly/images/logo_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
54 images 2.1 MB
0 oversized -0 KB
49 legacy format
12 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
7 fonts (170 KB)
PASS
7 fonts (170 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

170 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.3 s LCP 6.4 shttps://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-bold.woff2gilroy-bold.woff2 https://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-bold.woff2 — 21.6 KiB — 18 ms — font-display: swaphttps://cdn.oreillystatic.com/fonts/GuardianText/GuardianTextSans-Medium-Web.woff2GuardianTextSans-Medium... https://cdn.oreillystatic.com/fonts/GuardianText/GuardianTextSans-Medium-Web.woff2 — 35.7 KiB — 21 ms — font-display: swaphttps://cdn.oreillystatic.com/fonts/GuardianText/GuardianTextSans-Regular-Web.woff2GuardianTextSans-Regula... https://cdn.oreillystatic.com/fonts/GuardianText/GuardianTextSans-Regular-Web.woff2 — 35.9 KiB — 22 ms — font-display: swaphttps://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-light.woff2gilroy-light.woff2 https://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-light.woff2 — 20.4 KiB — 11 ms — font-display: swaphttps://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-semibold.woff2gilroy-semibold.woff2 https://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-semibold.woff2 — 21.2 KiB — 9 ms — font-display: swaphttps://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-regular.woff2gilroy-regular.woff2 https://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-regular.woff2 — 20.8 KiB — 14 ms — font-display: swaphttps://cdnapisec.kaltura.com/html5/html5lib/v2.86//skins/kdark/fonts/icomoon.woff?2026-04-19T08:53:20Zicomoon.woff https://cdnapisec.kaltura.com/html5/html5lib/v2.86//skins/kdark/fonts/icomoon.woff?2026-04-19T08:53:20Z — 14.1 KiB — 5 ms — font-display: swap
gilroy-bold.woff2 woff2 swap
Size 22 KB
Load time 18 ms
Start 792 ms
Risk FOUT — text flashes from fallback to web font
GuardianTextSans-Medium... woff2 swap
Size 36 KB
Load time 21 ms
Start 792 ms
Risk FOUT — text flashes from fallback to web font
GuardianTextSans-Regula... woff2 swap
Size 36 KB
Load time 22 ms
Start 792 ms
Risk FOUT — text flashes from fallback to web font
gilroy-light.woff2 woff2 swap
Size 20 KB
Load time 11 ms
Start 856 ms
Risk FOUT — text flashes from fallback to web font
gilroy-semibold.woff2 woff2 swap
Size 21 KB
Load time 9 ms
Start 998 ms
Risk FOUT — text flashes from fallback to web font
gilroy-regular.woff2 woff2 swap
Size 21 KB
Load time 14 ms
Start 998 ms
Risk FOUT — text flashes from fallback to web font
icomoon.woff woff swap
Size 14 KB
Load time 5 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)

Fixing the unchecked items could save ~4 KB and ~8 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
1
preload
—
dns-prefetch
—
prefetch
—

1 resource hints configured

A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Google Cloud

A
HTTP Caching
max-age=2592000 (4 weeks)
PASS
max-age=2592000 (4 weeks)
Info::
Cache-Control header is set
Got: max-age=2592000
Info::
Effective TTL: 4 weeks (max-age=2592000)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=2592000

DirectiveValueMeaning
max-age2592000Cache for 4 weeks
Effective TTL: 2592000 seconds
Network Waterfall
118 requests over 5499ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.3 s LCP 6.4 shttps://oreilly.com// https://oreilly.com/ — 301 — 317 B — 491 ms — http/1.1https://www.oreilly.com/www.oreilly.com/ https://www.oreilly.com/ — 200 — 42.5 KiB — 105 ms — h2https://cdn.oreillystatic.com/assets/css/2025_font_face.csscdn.oreillystatic.com/assets/css/20... https://cdn.oreillystatic.com/assets/css/2025_font_face.css — 200 — 940 B — 113 ms — h2https://cdn.oreillystatic.com/assets/css/odot-layout-20250313.csscdn.oreillystatic.com/assets/css/od... https://cdn.oreillystatic.com/assets/css/odot-layout-20250313.css — 200 — 25.3 KiB — 119 ms — h2https://cdn.oreillystatic.com/assets/css/nav-20260120.csscdn.oreillystatic.com/assets/css/na... https://cdn.oreillystatic.com/assets/css/nav-20260120.css — 200 — 4.0 KiB — 116 ms — h2https://cdn.oreillystatic.com/assets/js/nav-20260120.jscdn.oreillystatic.com/assets/js/nav... https://cdn.oreillystatic.com/assets/js/nav-20260120.js — 200 — 2.0 KiB — 117 ms — h2https://cdn.oreillystatic.com/oreilly/logos/logo_airbnb_reverse.svgcdn.oreillystatic.com/oreilly/logos... https://cdn.oreillystatic.com/oreilly/logos/logo_airbnb_reverse.svg — 200 — 2.0 KiB — 119 ms — h2https://cdn.oreillystatic.com/oreilly/logos/logo_blue_origin_reverse.svgcdn.oreillystatic.com/oreilly/logos... https://cdn.oreillystatic.com/oreilly/logos/logo_blue_origin_reverse.svg — 200 — 1.6 KiB — 121 ms — h2https://cdn.oreillystatic.com/oreilly/images/logo_electronic_arts.svgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/logo_electronic_arts.svg — 200 — 3.2 KiB — 11 ms — h2https://cdn.oreillystatic.com/oreilly/images/logo_home_depot.svgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/logo_home_depot.svg — 200 — 9.3 KiB — 16 ms — h2https://dev.visualwebsiteoptimizer.com/j.php?a=27087&u=https%3A%2F%2Fwww.oreilly.com%2F&vn=2.1&x=truedev.visualwebsiteoptimizer.com/j.ph... https://dev.visualwebsiteoptimizer.com/j.php?a=27087&u=https%3A%2F%2Fwww.oreilly.com%2F&vn=2.1&x=true — 200 — 2.6 KiB — 81 ms — h2https://cdn.oreillystatic.com/oreilly/images/logo_nasdaq_reverse.svgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/logo_nasdaq_reverse.svg — 200 — 2.2 KiB — 15 ms — h2https://cdnapisec.kaltura.com/p/1681692/sp/168169200/embedIframeJs/uiconf_id/47268383/partner_id/1681692cdnapisec.kaltura.com/p/1681692/sp/... https://cdnapisec.kaltura.com/p/1681692/sp/168169200/embedIframeJs/uiconf_id/47268383/partner_id/1681692 — 200 — 21.5 KiB — 66 ms — h2https://cdn.oreillystatic.com/ajax/libs/jquery/3.3.1/jquery.min.jscdn.oreillystatic.com/ajax/libs/jqu... https://cdn.oreillystatic.com/ajax/libs/jquery/3.3.1/jquery.min.js — 200 — 29.9 KiB — 24 ms — h2https://cdn.oreillystatic.com/ajax/libs/jquery/3.7.0/jquery.min.jscdn.oreillystatic.com/ajax/libs/jqu... https://cdn.oreillystatic.com/ajax/libs/jquery/3.7.0/jquery.min.js — 200 — 30.0 KiB — 29 ms — h2https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/uXrEVzLwhDD0Nr/aE0gZA/Cxp/8IWwsPSEBwww.oreilly.com/KxXuCyduA3/oq/qtiMw... https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/uXrEVzLwhDD0Nr/aE0gZA/Cxp/8IWwsPSEB — 200 — 172.1 KiB — 753 ms — h2https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0/QCMLZA/UnF/Te2ppT3lYwww.oreilly.com/KxXuCyduA3/oq/qtiMw... https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0/QCMLZA/UnF/Te2ppT3lY — 200 — 1.1 KiB — 35 ms — h2https://cdn.oreillystatic.com/oreilly/images/logo_rakuten_reverse.svgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/logo_rakuten_reverse.svg — 200 — 1.5 KiB — 25 ms — h2https://cdn.oreillystatic.com/oreilly/logos/logo_tcs_reverse.svgcdn.oreillystatic.com/oreilly/logos... https://cdn.oreillystatic.com/oreilly/logos/logo_tcs_reverse.svg — 200 — 4.2 KiB — 25 ms — h2https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb1-711x400-20230201.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb1-711x400-20230201.jpg — 200 — 41.5 KiB — 30 ms — h2https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb3-711x400-20230201.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb3-711x400-20230201.jpg — 200 — 45.8 KiB — 30 ms — h2https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb1-711x400-20221020.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb1-711x400-20221020.jpg — 200 — 48.7 KiB — 35 ms — h2https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb2-400x225-20221019.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb2-400x225-20221019.jpg — 200 — 15.8 KiB — 36 ms — h2https://cdn.oreillystatic.com/oreilly/images/app-store-logo.pngcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/app-store-logo.png — 200 — 11.1 KiB — 38 ms — h2https://cdn.oreillystatic.com/oreilly/images/google-play-logo.pngcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/google-play-logo.png — 200 — 9.0 KiB — 43 ms — h2https://cdn.oreillystatic.com/oreilly/images/roku-tv-logo.pngcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/roku-tv-logo.png — 200 — 3.1 KiB — 24 ms — h2https://cdn.oreillystatic.com/oreilly/images/amazon-appstore-logo.pngcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/amazon-appstore-logo.png — 200 — 2.8 KiB — 26 ms — h2https://cdn.oreillystatic.com/images/sitewide-headers/oreilly_logo_mark_red_@2x.pngcdn.oreillystatic.com/images/sitewi... https://cdn.oreillystatic.com/images/sitewide-headers/oreilly_logo_mark_red_@2x.png — 200 — 2.3 KiB — 16 ms — h2https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0/QCMLZA/Bi1/QUEVvemopwww.oreilly.com/KxXuCyduA3/oq/qtiMw... https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0/QCMLZA/Bi1/QUEVvemop — 200 — 28.6 KiB — 36 ms — h2https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0rEVzzE/MmwmZA/FCQ/hVwwjR1EPAg?v=4e12f83c-0b79-f2be-9165-13a7d6500214www.oreilly.com/KxXuCyduA3/oq/qtiMw... https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0rEVzzE/MmwmZA/FCQ/hVwwjR1EPAg?v=4e12f83c-0b79-f2be-9165-13a7d6500214 — 200 — 153.3 KiB — 48 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.3 s LCP 6.4 shttps://oreilly.com// https://oreilly.com/ — 301 — 317 B — 491 ms — http/1.1https://www.oreilly.com/www.oreilly.com/ https://www.oreilly.com/ — 200 — 42.5 KiB — 105 ms — h2https://cdn.oreillystatic.com/assets/css/2025_font_face.csscdn.oreillystatic.com/assets/css/20... https://cdn.oreillystatic.com/assets/css/2025_font_face.css — 200 — 940 B — 113 ms — h2https://cdn.oreillystatic.com/assets/css/odot-layout-20250313.csscdn.oreillystatic.com/assets/css/od... https://cdn.oreillystatic.com/assets/css/odot-layout-20250313.css — 200 — 25.3 KiB — 119 ms — h2https://cdn.oreillystatic.com/assets/css/nav-20260120.csscdn.oreillystatic.com/assets/css/na... https://cdn.oreillystatic.com/assets/css/nav-20260120.css — 200 — 4.0 KiB — 116 ms — h2https://cdn.oreillystatic.com/assets/js/nav-20260120.jscdn.oreillystatic.com/assets/js/nav... https://cdn.oreillystatic.com/assets/js/nav-20260120.js — 200 — 2.0 KiB — 117 ms — h2https://cdn.oreillystatic.com/oreilly/logos/logo_airbnb_reverse.svgcdn.oreillystatic.com/oreilly/logos... https://cdn.oreillystatic.com/oreilly/logos/logo_airbnb_reverse.svg — 200 — 2.0 KiB — 119 ms — h2https://cdn.oreillystatic.com/oreilly/logos/logo_blue_origin_reverse.svgcdn.oreillystatic.com/oreilly/logos... https://cdn.oreillystatic.com/oreilly/logos/logo_blue_origin_reverse.svg — 200 — 1.6 KiB — 121 ms — h2https://cdn.oreillystatic.com/oreilly/images/logo_electronic_arts.svgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/logo_electronic_arts.svg — 200 — 3.2 KiB — 11 ms — h2https://cdn.oreillystatic.com/oreilly/images/logo_home_depot.svgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/logo_home_depot.svg — 200 — 9.3 KiB — 16 ms — h2https://dev.visualwebsiteoptimizer.com/j.php?a=27087&u=https%3A%2F%2Fwww.oreilly.com%2F&vn=2.1&x=truedev.visualwebsiteoptimizer.com/j.ph... https://dev.visualwebsiteoptimizer.com/j.php?a=27087&u=https%3A%2F%2Fwww.oreilly.com%2F&vn=2.1&x=true — 200 — 2.6 KiB — 81 ms — h2https://cdn.oreillystatic.com/oreilly/images/logo_nasdaq_reverse.svgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/logo_nasdaq_reverse.svg — 200 — 2.2 KiB — 15 ms — h2https://cdnapisec.kaltura.com/p/1681692/sp/168169200/embedIframeJs/uiconf_id/47268383/partner_id/1681692cdnapisec.kaltura.com/p/1681692/sp/... https://cdnapisec.kaltura.com/p/1681692/sp/168169200/embedIframeJs/uiconf_id/47268383/partner_id/1681692 — 200 — 21.5 KiB — 66 ms — h2https://cdn.oreillystatic.com/ajax/libs/jquery/3.3.1/jquery.min.jscdn.oreillystatic.com/ajax/libs/jqu... https://cdn.oreillystatic.com/ajax/libs/jquery/3.3.1/jquery.min.js — 200 — 29.9 KiB — 24 ms — h2https://cdn.oreillystatic.com/ajax/libs/jquery/3.7.0/jquery.min.jscdn.oreillystatic.com/ajax/libs/jqu... https://cdn.oreillystatic.com/ajax/libs/jquery/3.7.0/jquery.min.js — 200 — 30.0 KiB — 29 ms — h2https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/uXrEVzLwhDD0Nr/aE0gZA/Cxp/8IWwsPSEBwww.oreilly.com/KxXuCyduA3/oq/qtiMw... https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/uXrEVzLwhDD0Nr/aE0gZA/Cxp/8IWwsPSEB — 200 — 172.1 KiB — 753 ms — h2https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0/QCMLZA/UnF/Te2ppT3lYwww.oreilly.com/KxXuCyduA3/oq/qtiMw... https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0/QCMLZA/UnF/Te2ppT3lY — 200 — 1.1 KiB — 35 ms — h2https://cdn.oreillystatic.com/oreilly/images/logo_rakuten_reverse.svgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/logo_rakuten_reverse.svg — 200 — 1.5 KiB — 25 ms — h2https://cdn.oreillystatic.com/oreilly/logos/logo_tcs_reverse.svgcdn.oreillystatic.com/oreilly/logos... https://cdn.oreillystatic.com/oreilly/logos/logo_tcs_reverse.svg — 200 — 4.2 KiB — 25 ms — h2https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb1-711x400-20230201.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb1-711x400-20230201.jpg — 200 — 41.5 KiB — 30 ms — h2https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb3-711x400-20230201.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb3-711x400-20230201.jpg — 200 — 45.8 KiB — 30 ms — h2https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb1-711x400-20221020.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb1-711x400-20221020.jpg — 200 — 48.7 KiB — 35 ms — h2https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb2-400x225-20221019.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb2-400x225-20221019.jpg — 200 — 15.8 KiB — 36 ms — h2https://cdn.oreillystatic.com/oreilly/images/app-store-logo.pngcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/app-store-logo.png — 200 — 11.1 KiB — 38 ms — h2https://cdn.oreillystatic.com/oreilly/images/google-play-logo.pngcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/google-play-logo.png — 200 — 9.0 KiB — 43 ms — h2https://cdn.oreillystatic.com/oreilly/images/roku-tv-logo.pngcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/roku-tv-logo.png — 200 — 3.1 KiB — 24 ms — h2https://cdn.oreillystatic.com/oreilly/images/amazon-appstore-logo.pngcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/amazon-appstore-logo.png — 200 — 2.8 KiB — 26 ms — h2https://cdn.oreillystatic.com/images/sitewide-headers/oreilly_logo_mark_red_@2x.pngcdn.oreillystatic.com/images/sitewi... https://cdn.oreillystatic.com/images/sitewide-headers/oreilly_logo_mark_red_@2x.png — 200 — 2.3 KiB — 16 ms — h2https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0/QCMLZA/Bi1/QUEVvemopwww.oreilly.com/KxXuCyduA3/oq/qtiMw... https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0/QCMLZA/Bi1/QUEVvemop — 200 — 28.6 KiB — 36 ms — h2https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0rEVzzE/MmwmZA/FCQ/hVwwjR1EPAg?v=4e12f83c-0b79-f2be-9165-13a7d6500214www.oreilly.com/KxXuCyduA3/oq/qtiMw... https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/X0rEVzzE/MmwmZA/FCQ/hVwwjR1EPAg?v=4e12f83c-0b79-f2be-9165-13a7d6500214 — 200 — 153.3 KiB — 48 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-5P4V6Zwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-5P4V6Z — 200 — 172.5 KiB — 147 ms — h2https://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-bold.woff2cdn.oreillystatic.com/fonts/Gilroy/... https://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-bold.woff2 — 200 — 21.6 KiB — 18 ms — h2https://cdn.oreillystatic.com/fonts/GuardianText/GuardianTextSans-Medium-Web.woff2cdn.oreillystatic.com/fonts/Guardia... https://cdn.oreillystatic.com/fonts/GuardianText/GuardianTextSans-Medium-Web.woff2 — 200 — 35.7 KiB — 21 ms — h2https://cdn.oreillystatic.com/fonts/GuardianText/GuardianTextSans-Regular-Web.woff2cdn.oreillystatic.com/fonts/Guardia... https://cdn.oreillystatic.com/fonts/GuardianText/GuardianTextSans-Regular-Web.woff2 — 200 — 35.9 KiB — 22 ms — h2https://cdn.oreillystatic.com/oreilly/images/hero-events-bg-20240611.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/hero-events-bg-20240611.jpg — 200 — 71.8 KiB — 16 ms — h2https://cdn.oreillystatic.com/oreilly/images/hero-odot-animal-20221104.pngcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/hero-odot-animal-20221104.png — 200 — 324.6 KiB — 45 ms — h2https://cdn.oreillystatic.com/images/icons/icon_link_chevron_white.svgcdn.oreillystatic.com/images/icons/... https://cdn.oreillystatic.com/images/icons/icon_link_chevron_white.svg — 200 — 511 B — 24 ms — h2https://cdn.oreillystatic.com/images/icons/icon_link_chevron_black.svgcdn.oreillystatic.com/images/icons/... https://cdn.oreillystatic.com/images/icons/icon_link_chevron_black.svg — 200 — 515 B — 35 ms — h2https://cdn.oreillystatic.com/oreilly/images/fish_french_grunt_histoirenaturell_cuvier_20251203.pngcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/fish_french_grunt_histoirenaturell_cuvier_20251203.png — 200 — 298.1 KiB — 46 ms — h2https://cdn.oreillystatic.com/images/live-online-training/39040-720x720.jpgcdn.oreillystatic.com/images/live-o... https://cdn.oreillystatic.com/images/live-online-training/39040-720x720.jpg — 200 — 183.9 KiB — 52 ms — h2https://cdn.oreillystatic.com/oreilly/images/home_sari_greene_720x720.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home_sari_greene_720x720.jpg — 200 — 136.5 KiB — 55 ms — h2https://cdn.oreillystatic.com/images/live-online-training/39420-720x720.jpgcdn.oreillystatic.com/images/live-o... https://cdn.oreillystatic.com/images/live-online-training/39420-720x720.jpg — 200 — 163.1 KiB — 55 ms — h2https://cdn.oreillystatic.com/oreilly/images/home_neal_ford_720x720.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home_neal_ford_720x720.jpg — 200 — 105.0 KiB — 56 ms — h2https://cdn.oreillystatic.com/oreilly/images/kelsey_hightower_color_400x400.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/kelsey_hightower_color_400x400.jpg — 200 — 55.6 KiB — 30 ms — h2https://cdn.oreillystatic.com/oreilly/images/ken-kousen-400x400.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/ken-kousen-400x400.jpg — 200 — 50.4 KiB — 32 ms — h2https://cdn.oreillystatic.com/oreilly/images/raven_awards_2024_443x442.pngcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/raven_awards_2024_443x442.png — 200 — 107.7 KiB — 20 ms — h2https://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-light.woff2cdn.oreillystatic.com/fonts/Gilroy/... https://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-light.woff2 — 200 — 20.4 KiB — 11 ms — h2https://dev.visualwebsiteoptimizer.com/v.gif?cd=0&a=27087&d=oreilly.com&u=D3112B9F770B7762415B4429DBB94524D&h=830ae0f72728d38a74b9eb7832290598&t=falsedev.visualwebsiteoptimizer.com/v.gi... https://dev.visualwebsiteoptimizer.com/v.gif?cd=0&a=27087&d=oreilly.com&u=D3112B9F770B7762415B4429DBB94524D&h=830ae0f72728d38a74b9eb7832290598&t=false — 200 — 147 B — 107 ms — h2https://cdnapisec.kaltura.com/html5/html5lib/v2.86/mwEmbedFrame.php?&wid=_1681692&uiconf_id=47268383&cache_st=1689279523&entry_id=1_7le83llz&flashvars[thumbnailUrl]=https%3A%2F%2Fcdn.oreillystatic.com%2Foreilly%2Fimages%2Fhome-video-testimonial-thumb1-711x400-20230201.jpg&flashvars[autoMute]=false&flashvars[autoPlay]=false&flashvars[controlBarContainer.plugin]=false&playerId=kaltura_player_1689279523&forceMobileHTML5=true&urid=2.86&protocol=https&callback=mwi_kalturaplayer16892795230cdnapisec.kaltura.com/html5/html5li... https://cdnapisec.kaltura.com/html5/html5lib/v2.86/mwEmbedFrame.php?&wid=_1681692&uiconf_id=47268383&cache_st=1689279523&entry_id=1_7le83llz&flashvars[thumbnailUrl]=https%3A%2F%2Fcdn.oreillystatic.com%2Foreilly%2Fimages%2Fhome-video-testimonial-thumb1-711x400-20230201.jpg&flashvars[autoMute]=false&flashvars[autoPlay]=false&flashvars[controlBarContainer.plugin]=false&playerId=kaltura_player_1689279523&forceMobileHTML5=true&urid=2.86&protocol=https&callback=mwi_kalturaplayer16892795230 — 200 — 58.0 KiB — 6 ms — h2https://cdnapisec.kaltura.com/html5/html5lib/v2.86/mwEmbedFrame.php?&wid=_1681692&uiconf_id=47268383&cache_st=1674688758&entry_id=1_td7km9vj&flashvars[thumbnailUrl]=https%3A%2F%2Fcdn.oreillystatic.com%2Foreilly%2Fimages%2Fhome-video-testimonial-thumb3-711x400-20230201.jpg&flashvars[autoMute]=false&flashvars[autoPlay]=false&flashvars[controlBarContainer.plugin]=false&playerId=kaltura_player_1674688758&forceMobileHTML5=true&urid=2.86&protocol=https&callback=mwi_kalturaplayer16746887580cdnapisec.kaltura.com/html5/html5li... https://cdnapisec.kaltura.com/html5/html5lib/v2.86/mwEmbedFrame.php?&wid=_1681692&uiconf_id=47268383&cache_st=1674688758&entry_id=1_td7km9vj&flashvars[thumbnailUrl]=https%3A%2F%2Fcdn.oreillystatic.com%2Foreilly%2Fimages%2Fhome-video-testimonial-thumb3-711x400-20230201.jpg&flashvars[autoMute]=false&flashvars[autoPlay]=false&flashvars[controlBarContainer.plugin]=false&playerId=kaltura_player_1674688758&forceMobileHTML5=true&urid=2.86&protocol=https&callback=mwi_kalturaplayer16746887580 — 200 — 58.1 KiB — 5 ms — h2https://cdnapisec.kaltura.com/html5/html5lib/v2.86/mwEmbedFrame.php?&wid=_1681692&uiconf_id=47268383&cache_st=1666285022&entry_id=1_nrvzd3wa&flashvars[thumbnailUrl]=https%3A%2F%2Fcdn.oreillystatic.com%2Foreilly%2Fimages%2Fhome-video-testimonial-thumb1-711x400-20221020.jpg&flashvars[autoMute]=false&flashvars[autoPlay]=false&flashvars[controlBarContainer.plugin]=false&playerId=kaltura_player_1666285022&forceMobileHTML5=true&urid=2.86&protocol=https&callback=mwi_kalturaplayer16662850220cdnapisec.kaltura.com/html5/html5li... https://cdnapisec.kaltura.com/html5/html5lib/v2.86/mwEmbedFrame.php?&wid=_1681692&uiconf_id=47268383&cache_st=1666285022&entry_id=1_nrvzd3wa&flashvars[thumbnailUrl]=https%3A%2F%2Fcdn.oreillystatic.com%2Foreilly%2Fimages%2Fhome-video-testimonial-thumb1-711x400-20221020.jpg&flashvars[autoMute]=false&flashvars[autoPlay]=false&flashvars[controlBarContainer.plugin]=false&playerId=kaltura_player_1666285022&forceMobileHTML5=true&urid=2.86&protocol=https&callback=mwi_kalturaplayer16662850220 — 200 — 58.0 KiB — 6 ms — h2https://cdnapisec.kaltura.com/html5/html5lib/v2.86/mwEmbedFrame.php?&wid=_1681692&uiconf_id=47268383&cache_st=1603408139&entry_id=1_4jl34ett&flashvars[thumbnailUrl]=https%3A%2F%2Fcdn.oreillystatic.com%2Foreilly%2Fimages%2Fhome-video-testimonial-thumb2-400x225-20221019.jpg&flashvars[autoMute]=false&flashvars[autoPlay]=false&flashvars[controlBarContainer.plugin]=false&playerId=kaltura_player_1660838772&forceMobileHTML5=true&urid=2.86&protocol=https&callback=mwi_kalturaplayer16608387720cdnapisec.kaltura.com/html5/html5li... https://cdnapisec.kaltura.com/html5/html5lib/v2.86/mwEmbedFrame.php?&wid=_1681692&uiconf_id=47268383&cache_st=1603408139&entry_id=1_4jl34ett&flashvars[thumbnailUrl]=https%3A%2F%2Fcdn.oreillystatic.com%2Foreilly%2Fimages%2Fhome-video-testimonial-thumb2-400x225-20221019.jpg&flashvars[autoMute]=false&flashvars[autoPlay]=false&flashvars[controlBarContainer.plugin]=false&playerId=kaltura_player_1660838772&forceMobileHTML5=true&urid=2.86&protocol=https&callback=mwi_kalturaplayer16608387720 — 200 — 58.0 KiB — 6 ms — h2https://ad.ipredictive.com/d/track/cvt/pixel?acct_id=58840&cache_buster=1776797621ad.ipredictive.com/d/track/cvt/pixe... https://ad.ipredictive.com/d/track/cvt/pixel?acct_id=58840&cache_buster=1776797621 — 200 — 858 B — 433 ms — http/1.1https://cdn.oreillystatic.com/oreilly/images/raven_blob_2.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/raven_blob_2.jpg — 200 — 25.8 KiB — 26 ms — h2https://cdn.oreillystatic.com/oreilly/images/raven_blob_3.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/raven_blob_3.jpg — 200 — 28.2 KiB — 12 ms — h2https://cdn.oreillystatic.com/oreilly/images/raven_blob_4.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/raven_blob_4.jpg — 200 — 28.5 KiB — 31 ms — h2https://cdn.oreillystatic.com/oreilly/images/raven_blob_5.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/raven_blob_5.jpg — 200 — 24.6 KiB — 31 ms — h2https://cdn.oreillystatic.com/oreilly/images/raven_blob_6.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/raven_blob_6.jpg — 200 — 40.8 KiB — 34 ms — h2https://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-semibold.woff2cdn.oreillystatic.com/fonts/Gilroy/... https://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-semibold.woff2 — 200 — 21.2 KiB — 9 ms — h2https://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-regular.woff2cdn.oreillystatic.com/fonts/Gilroy/... https://cdn.oreillystatic.com/fonts/Gilroy/Family/gilroy-regular.woff2 — 200 — 20.8 KiB — 14 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.js?did=f2036796-0a59-4891-aa19-3ae850a0aed9cdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js?did=f2036796-0a59-4891-aa19-3ae850a0aed9 — 200 — 9.1 KiB — 100 ms — h2https://www.googletagmanager.com/gtag/js?id=G-092EL089CH&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-092EL089CH&cx=c&gtm=4e64h1 — 200 — 168.6 KiB — 42 ms — h2data:image/png,%89PNG%0D%0A%1A%0A%00%00%00%0DIHDR%00%00%00%01%00%00%00%01%08%02%00%00%00%90wS%DE%00…data:image/png,%89PNG%0D%0A%1A%0A%0... data:image/png,%89PNG%0D%0A%1A%0A%00%00%00%0DIHDR%00%00%00%01%00%00%00%01%08%02%00%00%00%90wS%DE%00… — 200 — 0 B — 0 ms — datahttps://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260421T130225Z&*&protocol=https&wid=_1681692cdnapisec.kaltura.com/html5/html5li... https://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260421T130225Z&*&protocol=https&wid=_1681692 — 200 — 688.9 KiB — 23 ms — h2data:image/png,%89PNG%0D%0A%1A%0A%00%00%00%0DIHDR%00%00%00%01%00%00%00%01%08%02%00%00%00%90wS%DE%00…data:image/png,%89PNG%0D%0A%1A%0A%0... data:image/png,%89PNG%0D%0A%1A%0A%00%00%00%0DIHDR%00%00%00%01%00%00%00%01%08%02%00%00%00%90wS%DE%00… — 200 — 0 B — 0 ms — datahttps://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260421T130225Z&*&protocol=https&wid=_1681692cdnapisec.kaltura.com/html5/html5li... https://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260421T130225Z&*&protocol=https&wid=_1681692 — 200 — 0 B — 36 ms — h2data:image/png,%89PNG%0D%0A%1A%0A%00%00%00%0DIHDR%00%00%00%01%00%00%00%01%08%02%00%00%00%90wS%DE%00…data:image/png,%89PNG%0D%0A%1A%0A%0... data:image/png,%89PNG%0D%0A%1A%0A%00%00%00%0DIHDR%00%00%00%01%00%00%00%01%08%02%00%00%00%90wS%DE%00… — 200 — 0 B — 0 ms — datahttps://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260421T130225Z&*&protocol=https&wid=_1681692cdnapisec.kaltura.com/html5/html5li... https://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260421T130225Z&*&protocol=https&wid=_1681692 — 200 — 0 B — 24 ms — h2https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb1-711x400-20230201.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb1-711x400-20230201.jpg — 200 — 0 B — 1 ms — h2https://analytics.kaltura.com/api_v3/index.php?service=analytics&apiVersion=3.1&expiry=86400&clientTag=kwidget%3Av2.86&format=1&ignoreNull=1&action=trackEvent&entryId=1_7le83llz&partnerId=1681692&eventType=1&sessionId=c69d0d31-a6e3-c204-0d59-75fadd49c7ed&eventIndex=1&bufferTime=0&actualBitrate=-1&flavorId=-1&referrer=https%3A%2F%2Fwww.oreilly.com%2F&deliveryType=hls&sessionStartTime=null&uiConfId=47268383&clientVer=2.86&position=0&playbackType=vod&kalsig=edbc2e5dc1e56127114693e05af5b322analytics.kaltura.com/api_v3/index.... https://analytics.kaltura.com/api_v3/index.php?service=analytics&apiVersion=3.1&expiry=86400&clientTag=kwidget%3Av2.86&format=1&ignoreNull=1&action=trackEvent&entryId=1_7le83llz&partnerId=1681692&eventType=1&sessionId=c69d0d31-a6e3-c204-0d59-75fadd49c7ed&eventIndex=1&bufferTime=0&actualBitrate=-1&flavorId=-1&referrer=https%3A%2F%2Fwww.oreilly.com%2F&deliveryType=hls&sessionStartTime=null&uiConfId=47268383&clientVer=2.86&position=0&playbackType=vod&kalsig=edbc2e5dc1e56127114693e05af5b322 — 200 — 636 B — 832 ms — http/1.1https://cdnapisec.kaltura.com/html5/html5lib/v2.86//skins/kdark/fonts/icomoon.woff?2026-04-19T08:53:20Zcdnapisec.kaltura.com/html5/html5li... https://cdnapisec.kaltura.com/html5/html5lib/v2.86//skins/kdark/fonts/icomoon.woff?2026-04-19T08:53:20Z — 200 — 14.1 KiB — 5 ms — h2https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb3-711x400-20230201.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb3-711x400-20230201.jpg — 200 — 0 B — 1 ms — h2https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb1-711x400-20221020.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb1-711x400-20221020.jpg — 200 — 0 B — 1 ms — h2https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/uXrEVzLwhDD0Nr/aE0gZA/Cxp/8IWwsPSEBwww.oreilly.com/KxXuCyduA3/oq/qtiMw... https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/uXrEVzLwhDD0Nr/aE0gZA/Cxp/8IWwsPSEB — 201 — 1.0 KiB — 263 ms — h2https://analytics.kaltura.com/api_v3/index.php?service=analytics&apiVersion=3.1&expiry=86400&clientTag=kwidget%3Av2.86&format=1&ignoreNull=1&action=trackEvent&entryId=1_td7km9vj&partnerId=1681692&eventType=1&sessionId=0873e7ea-9553-fdb2-230b-711b98a6d590&eventIndex=1&bufferTime=0&actualBitrate=-1&flavorId=-1&referrer=https%3A%2F%2Fwww.oreilly.com%2F&deliveryType=hls&sessionStartTime=null&uiConfId=47268383&clientVer=2.86&position=0&playbackType=vod&kalsig=91446048a0b1e311f24de25021ad2a37analytics.kaltura.com/api_v3/index.... https://analytics.kaltura.com/api_v3/index.php?service=analytics&apiVersion=3.1&expiry=86400&clientTag=kwidget%3Av2.86&format=1&ignoreNull=1&action=trackEvent&entryId=1_td7km9vj&partnerId=1681692&eventType=1&sessionId=0873e7ea-9553-fdb2-230b-711b98a6d590&eventIndex=1&bufferTime=0&actualBitrate=-1&flavorId=-1&referrer=https%3A%2F%2Fwww.oreilly.com%2F&deliveryType=hls&sessionStartTime=null&uiConfId=47268383&clientVer=2.86&position=0&playbackType=vod&kalsig=91446048a0b1e311f24de25021ad2a37 — 200 — 636 B — 420 ms — http/1.1https://analytics.kaltura.com/api_v3/index.php?service=analytics&apiVersion=3.1&expiry=86400&clientTag=kwidget%3Av2.86&format=1&ignoreNull=1&action=trackEvent&entryId=1_nrvzd3wa&partnerId=1681692&eventType=1&sessionId=08b10aed-7bfd-22e6-ee18-ae0ad29929aa&eventIndex=1&bufferTime=0&actualBitrate=-1&flavorId=-1&referrer=https%3A%2F%2Fwww.oreilly.com%2F&deliveryType=hls&sessionStartTime=null&uiConfId=47268383&clientVer=2.86&position=0&playbackType=vod&kalsig=a6f1c4a85ebfb709fd1d4838efd77bd2analytics.kaltura.com/api_v3/index.... https://analytics.kaltura.com/api_v3/index.php?service=analytics&apiVersion=3.1&expiry=86400&clientTag=kwidget%3Av2.86&format=1&ignoreNull=1&action=trackEvent&entryId=1_nrvzd3wa&partnerId=1681692&eventType=1&sessionId=08b10aed-7bfd-22e6-ee18-ae0ad29929aa&eventIndex=1&bufferTime=0&actualBitrate=-1&flavorId=-1&referrer=https%3A%2F%2Fwww.oreilly.com%2F&deliveryType=hls&sessionStartTime=null&uiConfId=47268383&clientVer=2.86&position=0&playbackType=vod&kalsig=a6f1c4a85ebfb709fd1d4838efd77bd2 — 200 — 636 B — 590 ms — http/1.1data:image/png,%89PNG%0D%0A%1A%0A%00%00%00%0DIHDR%00%00%00%01%00%00%00%01%08%02%00%00%00%90wS%DE%00…data:image/png,%89PNG%0D%0A%1A%0A%0... data:image/png,%89PNG%0D%0A%1A%0A%00%00%00%0DIHDR%00%00%00%01%00%00%00%01%08%02%00%00%00%90wS%DE%00… — 200 — 0 B — 0 ms — datahttps://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260419T085420Z&*&protocol=https&wid=_1681692cdnapisec.kaltura.com/html5/html5li... https://cdnapisec.kaltura.com/html5/html5lib/v2.86/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2Cbase64_decode%2Cbase64_encode%2Cclass%2CcontrolBarContainer%2CcurrentTimeLabel%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnativeBridge%2CplayPauseBtn%2Cpolyfill_Array_filter%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2CsideBarContainer%2CsourceSelector%2Ctheme%2CtopBarContainer%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cmouse%2Cposition%2Cslider%2Ctooltip%2CtouchPunch%2Cwidget%7Cmediawiki.Uri%2CUtilitiesTime%2CUtilitiesUrl%2Cclient%2CjqueryMsg%2Ckmenu%2Clanguage%2Cutil%7Cmediawiki.util.tmpl%7Cmw.EmbedPlayer%2CEmbedPlayerImageOverlay%2CEmbedPlayerKplayer%2CEmbedPlayerNative%2CEmbedPlayerNativeComponent%2CEmbedTypes%2CKBaseButton%2CKBaseComponent%2CKBasePlugin%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%7Cmw.MwEmbedSupport.style&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260419T085420Z&*&protocol=https&wid=_1681692 — 200 — 688.9 KiB — 24 ms — h2https://www.oreilly.com/radar/feed/www.oreilly.com/radar/feed/ https://www.oreilly.com/radar/feed/ — 200 — 105.7 KiB — 48 ms — h2https://cdn.cookielaw.org/consent/f2036796-0a59-4891-aa19-3ae850a0aed9/f2036796-0a59-4891-aa19-3ae850a0aed9.jsoncdn.cookielaw.org/consent/f2036796-... https://cdn.cookielaw.org/consent/f2036796-0a59-4891-aa19-3ae850a0aed9/f2036796-0a59-4891-aa19-3ae850a0aed9.json — 200 — 2.4 KiB — 85 ms — h2https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb2-400x225-20221019.jpgcdn.oreillystatic.com/oreilly/image... https://cdn.oreillystatic.com/oreilly/images/home-video-testimonial-thumb2-400x225-20221019.jpg — 200 — 0 B — 1 ms — h2https://geolocation.onetrust.com/cookieconsentpub/v1/geo/locationgeolocation.onetrust.com/cookiecons... https://geolocation.onetrust.com/cookieconsentpub/v1/geo/location — 200 — 312 B — 116 ms — h2https://analytics.kaltura.com/api_v3/index.php?service=analytics&apiVersion=3.1&expiry=86400&clientTag=kwidget%3Av2.86&format=1&ignoreNull=1&action=trackEvent&entryId=1_4jl34ett&partnerId=1681692&eventType=1&sessionId=467b35c1-f293-2b68-8091-a935379fde21&eventIndex=1&bufferTime=0&actualBitrate=-1&flavorId=-1&referrer=https%3A%2F%2Fwww.oreilly.com%2F&deliveryType=hls&sessionStartTime=null&uiConfId=47268383&clientVer=2.86&position=0&playbackType=vod&kalsig=183cf2be5d48c1cb3e9c9dc49ba78555analytics.kaltura.com/api_v3/index.... https://analytics.kaltura.com/api_v3/index.php?service=analytics&apiVersion=3.1&expiry=86400&clientTag=kwidget%3Av2.86&format=1&ignoreNull=1&action=trackEvent&entryId=1_4jl34ett&partnerId=1681692&eventType=1&sessionId=467b35c1-f293-2b68-8091-a935379fde21&eventIndex=1&bufferTime=0&actualBitrate=-1&flavorId=-1&referrer=https%3A%2F%2Fwww.oreilly.com%2F&deliveryType=hls&sessionStartTime=null&uiConfId=47268383&clientVer=2.86&position=0&playbackType=vod&kalsig=183cf2be5d48c1cb3e9c9dc49ba78555 — 200 — 635 B — 217 ms — http/1.1https://cfvod.kaltura.com/p/1681692/sp/168169200/thumbnail/entry_id/1_7le83llz/version/100011/width/100/height/undefined/vid_slices/100cfvod.kaltura.com/p/1681692/sp/1681... https://cfvod.kaltura.com/p/1681692/sp/168169200/thumbnail/entry_id/1_7le83llz/version/100011/width/100/height/undefined/vid_slices/100 — 200 — 92.7 KiB — 123 ms — http/1.1https://cdn.oreillystatic.com/images/icons/icon_link_white.svgcdn.oreillystatic.com/images/icons/... https://cdn.oreillystatic.com/images/icons/icon_link_white.svg — 200 — 655 B — 13 ms — h2https://cdn.oreillystatic.com/images/icons/icon_podcast_white.svgcdn.oreillystatic.com/images/icons/... https://cdn.oreillystatic.com/images/icons/icon_podcast_white.svg — 200 — 689 B — 13 ms — h2https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Dark-factories%E2%80%94rise-of-the-trycycle-160x160.jpgwww.oreilly.com/radar/wp-content/up... https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Dark-factories%E2%80%94rise-of-the-trycycle-160x160.jpg — 200 — 7.2 KiB — 28 ms — h2https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Scenario-planning-for-an-uncertain-AI-future-160x160.jpgwww.oreilly.com/radar/wp-content/up... https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Scenario-planning-for-an-uncertain-AI-future-160x160.jpg — 200 — 8.1 KiB — 50 ms — h2https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Trial-by-fire-160x160.jpgwww.oreilly.com/radar/wp-content/up... https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Trial-by-fire-160x160.jpg — 200 — 10.8 KiB — 51 ms — h2https://www.oreilly.com/radar/wp-content/uploads/sites/3/2024/01/Podcast_Cover_GenAI_in_the_Real_World-160x160.pngwww.oreilly.com/radar/wp-content/up... https://www.oreilly.com/radar/wp-content/uploads/sites/3/2024/01/Podcast_Cover_GenAI_in_the_Real_World-160x160.png — 200 — 5.0 KiB — 52 ms — h2https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Scope-Creep-Kraken-by-Tim-OBrien-created-with-ChatGPT-160x160.pngwww.oreilly.com/radar/wp-content/up... https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Scope-Creep-Kraken-by-Tim-OBrien-created-with-ChatGPT-160x160.png — 200 — 45.7 KiB — 57 ms — h2https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/AI-is-writing-our-code-faster-than-we-can-verify-it-160x160.jpgwww.oreilly.com/radar/wp-content/up... https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/AI-is-writing-our-code-faster-than-we-can-verify-it-160x160.jpg — 200 — 4.6 KiB — 59 ms — h2https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Grief-and-the-nonprofessional-programmer-160x160.jpgwww.oreilly.com/radar/wp-content/up... https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Grief-and-the-nonprofessional-programmer-160x160.jpg — 200 — 8.8 KiB — 60 ms — h2https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Comprehension-debt-160x160.jpgwww.oreilly.com/radar/wp-content/up... https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Comprehension-debt-160x160.jpg — 200 — 7.4 KiB — 60 ms — h2https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Agents-dont-know-what-good-looks-like-160x160.jpgwww.oreilly.com/radar/wp-content/up... https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Agents-dont-know-what-good-looks-like-160x160.jpg — 200 — 5.8 KiB — 61 ms — h2https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Architecture-as-Code-to-Teach-Humans-and-Agents-About-Architecture-160x160.jpgwww.oreilly.com/radar/wp-content/up... https://www.oreilly.com/radar/wp-content/uploads/sites/3/2026/04/Architecture-as-Code-to-Teach-Humans-and-Agents-About-Architecture-160x160.jpg — 200 — 8.2 KiB — 62 ms — h2https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4cdn.oreillystatic.com/radar/generat... https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4 — 206 — 329 B — 587 ms — h2https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4cdn.oreillystatic.com/radar/generat... https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4 — 206 — 51.2 KiB — 599 ms — h2https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4cdn.oreillystatic.com/radar/generat... https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4 — 206 — 63.1 KiB — 2.6 s — h2https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4cdn.oreillystatic.com/radar/generat... https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4 — 206 — 328 B — 601 ms — h2https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4cdn.oreillystatic.com/radar/generat... https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4 — 206 — 329 B — 607 ms — h2https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4cdn.oreillystatic.com/radar/generat... https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4 — 206 — 329 B — 609 ms — h2https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4cdn.oreillystatic.com/radar/generat... https://cdn.oreillystatic.com/radar/generative-ai-real-world-podcast/GenAI_in_the_real_world_aishwarya_naresh_reganti_v2.mp4 — 206 — 329 B — 609 ms — h2https://www.oreilly.com/favicon.icowww.oreilly.com/favicon.ico https://www.oreilly.com/favicon.ico — 200 — 3.0 KiB — 23 ms — h2https://cdn.cookielaw.org/scripttemplates/202408.1.0/otBannerSdk.jscdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202408.1.0/otBannerSdk.js — 200 — 110.4 KiB — 45 ms — h2https://cdn.cookielaw.org/consent/f2036796-0a59-4891-aa19-3ae850a0aed9/188e93a3-c6b5-4a0e-bea0-d188b5f7cac0/en.jsoncdn.cookielaw.org/consent/f2036796-... https://cdn.cookielaw.org/consent/f2036796-0a59-4891-aa19-3ae850a0aed9/188e93a3-c6b5-4a0e-bea0-d188b5f7cac0/en.json — 200 — 30.6 KiB — 49 ms — h2https://cdn.cookielaw.org/scripttemplates/202408.1.0/assets/otFlat.jsoncdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202408.1.0/assets/otFlat.json — 200 — 3.1 KiB — 36 ms — h2https://cdn.cookielaw.org/scripttemplates/202408.1.0/assets/v2/otPcPanel.jsoncdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202408.1.0/assets/v2/otPcPanel.json — 200 — 12.9 KiB — 35 ms — h2https://cdn.cookielaw.org/scripttemplates/202408.1.0/assets/otCommonStyles.csscdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202408.1.0/assets/otCommonStyles.css — 200 — 4.3 KiB — 33 ms — h2https://cdn.cookielaw.org/logos/static/ot_guard_logo.svgcdn.cookielaw.org/logos/static/ot_g... https://cdn.cookielaw.org/logos/static/ot_guard_logo.svg — 200 — 644 B — 31 ms — h2https://cdn.cookielaw.org/logos/deacd13b-f3e1-4b01-87a3-f4cf077c0873/1d51e209-d67c-4409-8605-ff8b57c4f77a/fadbea5d-3cb7-4058-b1af-b4219811d368/oreilly_logo_red_d30000.pngcdn.cookielaw.org/logos/deacd13b-f3... https://cdn.cookielaw.org/logos/deacd13b-f3e1-4b01-87a3-f4cf077c0873/1d51e209-d67c-4409-8605-ff8b57c4f77a/fadbea5d-3cb7-4058-b1af-b4219811d368/oreilly_logo_red_d30000.png — 200 — 7.1 KiB — 29 ms — h2https://cdn.cookielaw.org/logos/static/powered_by_logo.svgcdn.cookielaw.org/logos/static/powe... https://cdn.cookielaw.org/logos/static/powered_by_logo.svg — 200 — 2.7 KiB — 30 ms — h2blob:https://www.oreilly.com/eec24ccc-6358-4ba5-a87a-4476eb8b2f50www.oreilly.com/eec24ccc-6358-4ba5-... blob:https://www.oreilly.com/eec24ccc-6358-4ba5-a87a-4476eb8b2f50 — -1 — 0 B — 0 ms — https://cfvod.kaltura.com/p/1681692/sp/168169200/thumbnail/entry_id/1_td7km9vj/version/100001/width/100/height/undefined/vid_slices/100cfvod.kaltura.com/p/1681692/sp/1681... https://cfvod.kaltura.com/p/1681692/sp/168169200/thumbnail/entry_id/1_td7km9vj/version/100001/width/100/height/undefined/vid_slices/100 — 200 — 73.2 KiB — 28 ms — http/1.1https://cfvod.kaltura.com/p/1681692/sp/168169200/thumbnail/entry_id/1_nrvzd3wa/version/100001/width/100/height/undefined/vid_slices/100cfvod.kaltura.com/p/1681692/sp/1681... https://cfvod.kaltura.com/p/1681692/sp/168169200/thumbnail/entry_id/1_nrvzd3wa/version/100001/width/100/height/undefined/vid_slices/100 — 200 — 79.4 KiB — 27 ms — http/1.1blob:https://www.oreilly.com/c3065540-fec6-4586-9fc0-ed87f1489600www.oreilly.com/c3065540-fec6-4586-... blob:https://www.oreilly.com/c3065540-fec6-4586-9fc0-ed87f1489600 — -1 — 0 B — 0 ms — https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/uXrEVzLwhDD0Nr/aE0gZA/Cxp/8IWwsPSEBwww.oreilly.com/KxXuCyduA3/oq/qtiMw... https://www.oreilly.com/KxXuCyduA3/oq/qtiMwY_O/uXrEVzLwhDD0Nr/aE0gZA/Cxp/8IWwsPSEB — 201 — 1.1 KiB — 289 ms — h2https://cfvod.kaltura.com/p/1681692/sp/168169200/thumbnail/entry_id/1_4jl34ett/version/100011/width/100/height/undefined/vid_slices/100cfvod.kaltura.com/p/1681692/sp/1681... https://cfvod.kaltura.com/p/1681692/sp/168169200/thumbnail/entry_id/1_4jl34ett/version/100011/width/100/height/undefined/vid_slices/100 — 200 — 89.9 KiB — 27 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 17393ms · 1619KB · €189/mo
www.oreilly.com
Other
Costly
Execution 8803ms
Transfer 42 KB
Monthly Cost €96/mo
cdnapisec.kaltura.com
Other
Costly
Execution 3137ms
Transfer 0 KB
Unused 70%
Monthly Cost €34/mo
Unattributable
Other
Costly
Execution 1299ms
Transfer 0 KB
Monthly Cost €14/mo
cdnapisec.kaltura.com
Other
Costly
Execution 920ms
Transfer 689 KB
Unused 70%
Monthly Cost €10/mo
www.oreilly.com
Other
Costly
Execution 777ms
Transfer 153 KB
Unused 21%
Monthly Cost €8/mo
www.oreilly.com
Other
Costly
Execution 764ms
Transfer 1 KB
Unused 21%
Monthly Cost €8/mo
Google Tag Manager
Tag Manager
Costly
Execution 415ms
Transfer 172 KB
Unused 44%
Monthly Cost €5/mo
OneTrust
Consent
Essential
Execution 259ms
Transfer 110 KB
Unused 53%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 249ms
Transfer 169 KB
Unused 45%
Monthly Cost €3/mo
cdnapisec.kaltura.com
Other
Optional
Execution 195ms
Transfer 58 KB
Monthly Cost €2/mo
cdnapisec.kaltura.com
Other
Optional
Execution 167ms
Transfer 58 KB
Monthly Cost €2/mo
cdnapisec.kaltura.com
Other
Optional
Execution 165ms
Transfer 58 KB
Monthly Cost €2/mo
cdnapisec.kaltura.com
Other
Optional
Execution 129ms
Transfer 58 KB
Monthly Cost €1/mo
www.oreilly.com
Other
Optional
Execution 63ms
Transfer 29 KB
Monthly Cost €1/mo
cdnapisec.kaltura.com
Other
Optional
Execution 52ms
Transfer 21 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.oreilly.com adds 8803ms and costs ~€96/month
  • cdnapisec.kaltura.com adds 3137ms and costs ~€34/month
  • Unattributable adds 1299ms and costs ~€14/month
  • cdnapisec.kaltura.com adds 920ms and costs ~€10/month
  • www.oreilly.com adds 777ms and costs ~€8/month
  • www.oreilly.com adds 764ms and costs ~€8/month
  • Google Tag Manager adds 415ms and costs ~€5/month
  • Google Tag Manager adds 249ms and costs ~€3/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.oreilly.com takes 8803ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

cdnapisec.kaltura.com takes 3137ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

70% of cdnapisec.kaltura.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

Unattributable takes 1299ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

cdnapisec.kaltura.com takes 920ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

70% of cdnapisec.kaltura.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

www.oreilly.com takes 777ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.oreilly.com takes 764ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 415ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

53% of OneTrust's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

Google Tag Manager takes 249ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback