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https://www.ibm.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
5
REVIEW
2
PASS
5
INFO
2

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

Mobile Desktop
41
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
77
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
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.

1.91 s

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

2.22 s

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

907 ms

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

0.106

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

5.49 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.

9.44 s

Page Load Progression

2.8 s
5.6 s
8.4 s
11.2 s
14.0 s
16.9 s
19.7 s
22.5 s
Checks
14
5 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
25.9 MB transferred, 208 requests
FIX
25.9 MB transferred, 208 requests
Critical::
Page weighs 55.2 MB (25.9 MB transferred)
Warning::
JavaScript is 5.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 5.8 MB
Warning::
Images are 3.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.0 MB
Info::
Fonts are 627 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 627 KB
Info::
CSS is 530 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 530 KB
Warning::
208 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 5.4 g CO2 per page load
25.9 MB / 2.4 MB budget
25.9 MB transferred
208 requests
5.4 g CO2 per page load
Other 15.8 MiB 61%
JavaScript 5.8 MiB 22%
Images 3.0 MiB 12%
Fonts 627.3 KiB 2%
CSS 530.0 KiB 2%
Other 65.5 KiB 0%
HTML 43.8 KiB 0%
Other 3.0 KiB 0%
Other 0 B 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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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
79% third-party, 0 ms blocking
FIX
79% third-party, 0 ms blocking
Warning::
Third-party code accounts for 79% of page weight (20.3 MiB of 25.9 MiB)
Info::
Third-party blocking time is low (0 ms)
21%
79%
First-party Third-party
F
JS Execution Cost
Action
7882ms total JS execution
FIX
7882ms total JS execution
Warning::
https://www.ibm.com/us-en: 2764ms CPU time
Warning::
https://cdnapisec.kaltura.com/html5/html5lib/v2.10...: 1072ms CPU time
Warning::
Unattributable: 679ms CPU time
Warning::
https://www.ibm.com/etc.clientlibs/adobe-cms/clien...: 373ms CPU time
Warning::
https://web-chat.global.assistant.watson.appdomain...: 347ms CPU time
Info::
Third-party scripts: 3170ms (40% of total)

Main Thread Breakdown

Script Evaluation 34% Style & Layout 27% Other 23% Script Parsing & Compilation 10% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.ibm.com/us-en2764ms90ms3ms1st
https://cdnapisec.kaltura.com/html5/html5lib/v2.101/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2CaudioSelector%2Cbase64_decode%2Cbase64_encode%2Cchapters%2Cclass%2CclosedCaptions%2CcontrolBarContainer%2CcurrentTimeLabel%2Cdotdotdot%2CdualScreen%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CjCarouse%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnanoScroller%2CnativeBridge%2CplayPauseBtn%2CplaybackRateSelectorPlugin%2Cpolyfill_Array_filter%2Cpolyfill_Array_forEach%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2Cshare%2CsideBarContainer%2CsourceSelector%2CstreamSelector%2Ctheme%2CtitleLabel%2CtopBarContainer%2CtouchSwipe%2Ctypeahead%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cdraggable%2Cdroppable%2Cmouse%2Cposition%2Cresizable%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%2CKBaseMediaList%2CKBasePlugin%2CKBaseScreen%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKPushServerNotification%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%2CTextSource%2CajaxProxy%7Cmw.Language.names%7Cmw.MwEmbedSupport.style%7Csocket.io%7Cvtt.js&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260407T025526Z&*&protocol=https&wid=_17738411072ms747ms89ms3rd
Unattributable679ms42ms0ms3rd
https://www.ibm.com/etc.clientlibs/adobe-cms/clientlibs/clientlib-caem-video-player.lc-a78a05617af4f81111cdc202d3dc9cd5-lc.min.js373ms67ms20ms1st
https://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/chat~cds-ai-chat-styles-reset.js347ms155ms35ms3rd
https://www.ibm.com/account/ibmidutil/widget/js/main.js273ms197ms66ms1st
https://www.ibm.com/etc.clientlibs/adobe-cms/clientlibs/clientlib-card-group.lc-d03463df3d756e6c4e91079a35c54532-lc.min.js266ms107ms54ms1st
https://1.www.s81c.com/common/stats/ibm-common.js237ms193ms8ms3rd
https://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/chat~cds-ai-chat-render.js227ms89ms64ms3rd
https://1.www.s81c.com/cognitive-tooling-unified-chat/v1/webchat.bundle.js?version=2.0213ms122ms90ms3rd

Showing top 10 of 22 scripts

F
JS Bundles
Action
99 scripts, 1.8 MB unused
FIX
99 scripts, 1.8 MB unused
Warning::
https://cdnapisec.kaltura.com/html5/html5lib/v2.10...: 715 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://1.www.s81c.com/cognitive-tooling-unified-c...: 511 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.ibm.com/account/ibmidutil/widget/js/ma...: 91 KB unused (20%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cloud.ibm.com/analytics/build/bluemix-anal...: 88 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.ibm.com/etc.clientlibs/adobe-cms/clien...: 59 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.8 MB
1844 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdnapisec.kaltura.com/html5/html5lib/v2.101/load.php?debug=false&lang=en&modules=Hlsjs%2CPolyfill_Set%2CacCheck%2CacPreview%2CaudioSelector%2Cbase64_decode%2Cbase64_encode%2Cchapters%2Cclass%2CclosedCaptions%2CcontrolBarContainer%2CcurrentTimeLabel%2Cdotdotdot%2CdualScreen%2CdurationLabel%2CfullScreenBtn%2Cid3Tag%2CjCarouse%2CkAnalony%2Ckdark%2CkeyboardShortcuts%2CkgitGuard%2ClargePlayBtn%2CliveStream%2CmatchMedia%2CmorePlugins%2CnanoScroller%2CnativeBridge%2CplayPauseBtn%2CplaybackRateSelectorPlugin%2Cpolyfill_Array_filter%2Cpolyfill_Array_forEach%2CqualitySettings%2CreportError%2Cscreenfull%2Cscrubber%2Cshare%2CsideBarContainer%2CsourceSelector%2CstreamSelector%2Ctheme%2CtitleLabel%2CtopBarContainer%2CtouchSwipe%2Ctypeahead%2CunMuteOverlayButton%2Cutf8_encode%2CvolumeControl%7Cjquery.client%2Ccolor%2Ccookie%2Cdebouncedresize%2ChoverIntent%2CmessageBox%2CmwEmbedUtil%2CmwExtension%2CnaturalSize%7Cjquery.ui.core%2Cdraggable%2Cdroppable%2Cmouse%2Cposition%2Cresizable%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%2CKBaseMediaList%2CKBasePlugin%2CKBaseScreen%2CKBaseSmartContainer%2CKCuePoints%2CKDPMapping%2CKEntryLoader%2CKPushServerNotification%2CKWidgetSupport%2CKalturaIframePlayerSetup%2CMediaElement%2CMediaPlayer%2CMediaPlayers%2CMediaSource%2CPlayerElement%2CPlayerElementFlash%2CPlayerElementHTML%2CPluginManager%2CTextSource%2CajaxProxy%7Cmw.Language.names%7Cmw.MwEmbedSupport.style%7Csocket.io%7Cvtt.js&pskwidgetpath=..%2Fkwidget-ps%2F&skin=no-theme&version=20260407T025526Z&*&protocol=https&wid=_17738411025 KB715 KB (70%)✓3rd
https://1.www.s81c.com/cognitive-tooling-unified-chat/v1/webchat.bundle.js?version=2.0743 KB511 KB (69%)✓3rd
https://www.ibm.com/account/ibmidutil/widget/js/main.js449 KB91 KB (20%)✓1st
https://cloud.ibm.com/analytics/build/bluemix-analytics.min.js114 KB88 KB (77%)✓3rd
https://www.ibm.com/etc.clientlibs/adobe-cms/clientlibs/clientlib-idlStyles.lc-8eb92c78ab6b12e247c04eb88405c135-lc.min.js82 KB59 KB (73%)✓1st
https://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/chat~cds-ai-chat-bootstrap.js102 KB54 KB (54%)✓3rd
https://tags.tiqcdn.com/utag/ibm/web/prod/utag.js90 KB49 KB (55%)✓3rd
https://www.ibm.com/hRvo6h/Ynf/d5i/ctPvLWea/Ef9hJtkLtfLkDt/YnB5eA/JS0f/GRJMYnUB176 KB37 KB (21%)✓1st
https://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/chat~cds-ai-chat-render.js235 KB36 KB (15%)✓3rd
https://1.www.s81c.com/common/stats/ibm-common.js83 KB34 KB (41%)✓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
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
20 images, 0 KB saveable
REVIEW
20 images, 0 KB saveable
Info::
All images are well-optimized
20 images 3.0 MB
0 oversized -0 KB
5 legacy format
0 missing dimensions CLS risk
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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
17 fonts (627 KB)
PASS
17 fonts (627 KB)
Info::
17 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

17

627 KB total

Render-blocking

0

of 17

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.9 s LCP 2.2 shttps://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin1.woff2IBMPlexSans-Regular-Lat... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin1.woff2 — 20.8 KiB — 0 ms — font-display: swaphttps://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Light-Latin1.woff2IBMPlexSans-Light-Latin... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Light-Latin1.woff2 — 22.0 KiB — 0 ms — font-display: swaphttps://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-SemiBold-Latin1.woff2IBMPlexSans-SemiBold-La... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-SemiBold-Latin1.woff2 — 22.0 KiB — 0 ms — font-display: swaphttps://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Mono/fonts/split/woff2/IBMPlexMono-Regular-Latin1.woff2IBMPlexMono-Regular-Lat... https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Mono/fonts/split/woff2/IBMPlexMono-Regular-Latin1.woff2 — 17.2 KiB — 0 ms — font-display: swaphttps://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Regular.woff2IBMPlexSans-Regular.woff2 https://1.www.s81c.com/common/carbon/plex/fonts/IBM-Plex-Sans/fonts/complete/woff2/IBMPlexSans-Regular.woff2 — 61.9 KiB — 0 ms — font-display: swaphttps://www.ibm.com/etc.clientlibs/adobe-cms/clientlibs/clientlib-idlStyles/resources/fonts/ffc8ae5d07a2166e6af1.ttf?6n2hoffc8ae5d07a2166e6af1.ttf https://www.ibm.com/etc.clientlibs/adobe-cms/clientlibs/clientlib-idlStyles/resources/fonts/ffc8ae5d07a2166e6af1.ttf?6n2ho — 184.0 KiB — 0 ms — font-display: swaphttps://consent.trustarc.com/get?name=IBM_PlexSans-Regular.ttfget https://consent.trustarc.com/get?name=IBM_PlexSans-Regular.ttf — 76.1 KiB — 0 ms — font-display: swaphttps://consent.trustarc.com/get?name=IBM_PlexSans-SemiBold.ttfget https://consent.trustarc.com/get?name=IBM_PlexSans-SemiBold.ttf — 80.5 KiB — 0 ms — font-display: swaphttps://1.www.s81c.com/common/fonts/plex/v1/ibmplexsans-regular.woff2ibmplexsans-regular.woff2 https://1.www.s81c.com/common/fonts/plex/v1/ibmplexsans-regular.woff2 — 34.7 KiB — 0 ms — font-display: swaphttps://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin1.woff2IBMPlexSans-Regular-Lat... https://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin1.woff2 — 16.7 KiB — 0 ms — font-display: swaphttps://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Light-Latin1.woff2IBMPlexSans-Light-Latin... https://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Light-Latin1.woff2 — 17.4 KiB — 0 ms — font-display: swaphttps://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-SemiBold-Latin1.woff2IBMPlexSans-SemiBold-La... https://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-SemiBold-Latin1.woff2 — 17.5 KiB — 0 ms — font-display: swaphttps://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Mono/fonts/split/woff2/IBMPlexMono-Regular-Latin1.woff2IBMPlexMono-Regular-Lat... https://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Mono/fonts/split/woff2/IBMPlexMono-Regular-Latin1.woff2 — 13.5 KiB — 0 ms — font-display: swaphttps://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin2.woff2IBMPlexSans-Regular-Lat... https://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin2.woff2 — 14.7 KiB — 0 ms — font-display: swaphttps://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin3.woff2IBMPlexSans-Regular-Lat... https://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Latin3.woff2 — 6.8 KiB — 0 ms — font-display: swaphttps://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Pi.woff2IBMPlexSans-Regular-Pi.... https://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Pi.woff2 — 7.2 KiB — 0 ms — font-display: swaphttps://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Cyrillic.woff2IBMPlexSans-Regular-Cyr... https://web-chat.global.assistant.watson.appdomain.cloud/versions/8.11.0/fonts/IBM-Plex-Sans/fonts/split/woff2/IBMPlexSans-Regular-Cyrillic.woff2 — 14.6 KiB — 0 ms — font-display: swap
IBMPlexSans-Regular-Lat... woff2 swap
Size 21 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-Light-Latin... woff2 swap
Size 22 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-SemiBold-La... woff2 swap
Size 22 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexMono-Regular-Lat... woff2 swap
Size 17 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-Regular.woff2 woff2 swap
Size 62 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
ffc8ae5d07a2166e6af1.ttf ttf swap
Size 184 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
get ttf swap
Size 76 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
get ttf swap
Size 80 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
ibmplexsans-regular.woff2 woff2 swap
Size 35 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-Regular-Lat... woff2 swap
Size 17 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-Light-Latin... woff2 swap
Size 17 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-SemiBold-La... woff2 swap
Size 17 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexMono-Regular-Lat... woff2 swap
Size 14 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-Regular-Lat... woff2 swap
Size 15 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-Regular-Lat... woff2 swap
Size 7 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-Regular-Pi.... woff2 swap
Size 7 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
IBMPlexSans-Regular-Cyr... woff2 swap
Size 15 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
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 ~194 KB and ~388 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
208 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
40% of JavaScript execution is third-party
First-party Third-party 3170ms · 2491KB · $42/mo
cdnapisec.kaltura.com
Other
Costly
Execution 1072ms
Transfer 1025 KB
Unused 70%
Monthly Cost $14/mo
Unattributable
Other
Costly
Execution 679ms
Transfer 0 KB
Monthly Cost $9/mo
web-chat.global.assistant.watson.appdomain.cloud
Other
Costly
Execution 347ms
Transfer 138 KB
Monthly Cost $5/mo
1.www.s81c.com
Other
Costly
Execution 237ms
Transfer 83 KB
Unused 41%
Monthly Cost $3/mo
web-chat.global.assistant.watson.appdomain.cloud
Other
Costly
Execution 227ms
Transfer 235 KB
Unused 15%
Monthly Cost $3/mo
1.www.s81c.com
Other
Costly
Execution 213ms
Transfer 743 KB
Unused 69%
Monthly Cost $3/mo
assets.adobedtm.com
Other
Optional
Execution 107ms
Transfer 103 KB
Unused 32%
Monthly Cost $1/mo
consent.trustarc.com
Other
Optional
Execution 84ms
Transfer 36 KB
Unused 58%
Monthly Cost $1/mo
tags.tiqcdn.com
Other
Optional
Execution 80ms
Transfer 90 KB
Unused 55%
Monthly Cost $1/mo
consent.trustarc.com
Other
Optional
Execution 74ms
Transfer 16 KB
Monthly Cost $1/mo
cdnapisec.kaltura.com
Other
Optional
Execution 50ms
Transfer 21 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • cdnapisec.kaltura.com adds 1072ms and costs ~$14/month
  • Unattributable adds 679ms and costs ~$9/month
  • web-chat.global.assistant.watson.appdomain.cloud adds 347ms and costs ~$5/month
  • 1.www.s81c.com adds 237ms and costs ~$3/month
  • web-chat.global.assistant.watson.appdomain.cloud adds 227ms and costs ~$3/month
  • 1.www.s81c.com adds 213ms and costs ~$3/month

40% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

cdnapisec.kaltura.com takes 1072ms 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 679ms 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

web-chat.global.assistant.watson.appdomain.cloud takes 347ms 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

1.www.s81c.com takes 237ms 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

web-chat.global.assistant.watson.appdomain.cloud takes 227ms 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

1.www.s81c.com takes 213ms 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

69% of 1.www.s81c.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

58% of consent.trustarc.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

55% of tags.tiqcdn.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

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.

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