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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
3
REVIEW
4
PASS
6
INFO
2

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

Mobile Desktop
95
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
69
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

987 ms

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

1.32 s

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

46 ms

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

0.010

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

1.13 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.

2.73 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
15
6 PASS 4 REVIEW 3 FIX
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 (1.5 MiB of 1.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
19 scripts, 759 KB unused
FIX
19 scripts, 759 KB unused
Warning::
https://cdn.taboola.com/libtrc/futureplc-network/l...: 201 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://bordeaux.futurecdn.net/bordeaux.js: 97 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-172...: 92 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-PYEV...: 81 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-ZYPP...: 80 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 759 KB
759 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.taboola.com/libtrc/futureplc-network/loader.js331 KB201 KB (61%)✓3rd
https://bordeaux.futurecdn.net/bordeaux.js177 KB97 KB (55%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-1721979-3&l=gtmDataLayer&cx=c&gtm=4e64e1&bs=ctrl125 KB92 KB (74%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-PYEVMBNKGH&cx=c&gtm=4e64e1&bs=ctrl145 KB81 KB (56%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-ZYPP7YFBVB&l=gtmDataLayer&cx=c&gtm=4e64e1&bs=ctrl151 KB80 KB (53%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-1721979-3125 KB68 KB (55%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KJCP7P&l=gtmDataLayer135 KB58 KB (43%)✓3rd
https://cdn.onesignal.com/sdks/OneSignalPageSDKES6.js?v=15160769 KB45 KB (66%)✓3rd
https://forums.anandtech.com/js/xf/core-compiled.js?_v=fddf013653 KB38 KB (71%)✓3rd
https://forums.anandtech.com/js/themehouse/watch/action.min.js?_v=fddf01361 KB—✓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
64 resources · 1.5 MB · 759 KB savings available
FIX
64 resources · 1.5 MB · 759 KB savings available
Warning::
Page weight 545 KB over 1MB target
Got: 1.5 MB Expected: ≤ 1 MB
Info::
~759 KB of savings available
Warning::
63 third-party resources (100% of weight)
Info::
1 resources over 200KB
64 resources · 1.5 MiB · 63 third-party 545.0 KiB over 1MB target
JavaScript 86% · 1.3 MiB
Image 9% · 134.3 KiB
CSS 3% · 46.2 KiB
Document 2% · 28.0 KiB
Other 0% · 7.7 KiB

~759.2 KiB of savings available

Remove unused JavaScript: 759.2 KiB
B
Page Weight Budget
1.5 MB transferred, 64 requests
REVIEW
1.5 MB transferred, 64 requests
Info::
Page weighs 5.3 MB (1.5 MB transferred)
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Info::
64 HTTP requests
Info::
Estimated 0.32 g CO2 per page load
1.5 MB / 2.4 MB budget
1.5 MB transferred
64 requests
0.32 g CO2 per page load
JavaScript 1.3 MiB 86%
Images 88.3 KiB 6%
Other 47.6 KiB 3%
CSS 46.2 KiB 3%
HTML 26.2 KiB 2%
Other 7.2 KiB 0%
Other 665 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

B
Image Optimization
29 images, 0 KB saveable
REVIEW
29 images, 0 KB saveable
Info::
All images are well-optimized
29 images 88 KB
0 oversized -0 KB
29 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1048ms total JS execution
REVIEW
1048ms total JS execution
Warning::
https://forums.anandtech.com/: 269ms CPU time
Info::
Unattributable: 246ms CPU time
Info::
https://bordeaux.futurecdn.net/bordeaux.js: 99ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-KJC...: 93ms CPU time
Info::
https://cdn.taboola.com/libtrc/futureplc-network/l...: 92ms CPU time
Warning::
Third-party scripts: 1048ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Style & Layout 17% Other 15% Script Parsing & Compilation 11%
ScriptTotalScriptingParse/CompileParty
https://forums.anandtech.com/269ms24ms3ms3rd
Unattributable246ms79ms0ms3rd
https://bordeaux.futurecdn.net/bordeaux.js99ms77ms16ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KJCP7P&l=gtmDataLayer93ms73ms12ms3rd
https://cdn.taboola.com/libtrc/futureplc-network/loader.js92ms52ms40ms3rd
https://www.googletagmanager.com/gtag/js?id=UA-1721979-373ms62ms10ms3rd
https://www.googletagmanager.com/gtag/js?id=G-ZYPP7YFBVB&l=gtmDataLayer&cx=c&gtm=4e64e1&bs=ctrl63ms51ms11ms3rd
https://cdn.onesignal.com/sdks/OneSignalPageSDKES6.js?v=15160762ms45ms9ms3rd
https://www.googletagmanager.com/gtag/js?id=G-PYEVMBNKGH&cx=c&gtm=4e64e1&bs=ctrl51ms41ms10ms3rd
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
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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
A
HTTP Caching
max-age=3600 (1 hour)
PASS
max-age=3600 (1 hour)
Info::
Cache-Control header is set
Got: max-age=3600
Info::
Effective TTL: 1 hour (max-age=3600)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=3600

DirectiveValueMeaning
max-age3600Cache for 1 hour
Effective TTL: 3600 seconds
Network Waterfall
64 requests over 1596ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 987 ms LCP 1.3 shttps://anandtech.com// https://anandtech.com/ — 301 — 163 B — 415 ms — h2https://forums.anandtech.com/forums.anandtech.com/ https://forums.anandtech.com/ — 200 — 26.2 KiB — 108 ms — h2https://forums.anandtech.com/css.php?css=public%3Anormalize.css%2Cpublic%3Afa.css%2Cpublic%3Avariations.less%2Cpublic%3Acore.less%2Cpublic%3Aapp.less&s=1&l=1&d=1775944137&k=af958c765bd98cacf1190720e33ad54d4366ea5eforums.anandtech.com/css.php?css=pu... https://forums.anandtech.com/css.php?css=public%3Anormalize.css%2Cpublic%3Afa.css%2Cpublic%3Avariations.less%2Cpublic%3Acore.less%2Cpublic%3Aapp.less&s=1&l=1&d=1775944137&k=af958c765bd98cacf1190720e33ad54d4366ea5e — 200 — 43.1 KiB — 43 ms — h2https://forums.anandtech.com/css.php?css=public%3Anode_list.less%2Cpublic%3Anotices.less%2Cpublic%3Ashare_controls.less%2Cpublic%3Aextra.less&s=1&l=1&d=1775944137&k=f01673533f7c22812e29be29ad29ce51e7367472forums.anandtech.com/css.php?css=pu... https://forums.anandtech.com/css.php?css=public%3Anode_list.less%2Cpublic%3Anotices.less%2Cpublic%3Ashare_controls.less%2Cpublic%3Aextra.less&s=1&l=1&d=1775944137&k=f01673533f7c22812e29be29ad29ce51e7367472 — 200 — 3.0 KiB — 25 ms — h2https://forums.anandtech.com/js/xf/preamble.min.js?_v=fddf0136forums.anandtech.com/js/xf/preamble... https://forums.anandtech.com/js/xf/preamble.min.js?_v=fddf0136 — 200 — 2.0 KiB — 17 ms — h2https://forums.anandtech.com/webmanifest.phpforums.anandtech.com/webmanifest.ph... https://forums.anandtech.com/webmanifest.php — 200 — 665 B — 33 ms — h2https://forums.anandtech.com/js/vendor/vendor-compiled.js?_v=fddf0136forums.anandtech.com/js/vendor/vend... https://forums.anandtech.com/js/vendor/vendor-compiled.js?_v=fddf0136 — 200 — 4.5 KiB — 17 ms — h2https://forums.anandtech.com/js/xf/core-compiled.js?_v=fddf0136forums.anandtech.com/js/xf/core-com... https://forums.anandtech.com/js/xf/core-compiled.js?_v=fddf0136 — 200 — 53.4 KiB — 28 ms — h2https://quantcast.mgr.consensu.org/choice/uer8ZPXHG8WDU/forums.anandtech.com/choice.jsquantcast.mgr.consensu.org/choice/u... https://quantcast.mgr.consensu.org/choice/uer8ZPXHG8WDU/forums.anandtech.com/choice.js — -1 — 0 B — 159 ms — https://forums.anandtech.com/js/themehouse/watch/action.min.js?_v=fddf0136forums.anandtech.com/js/themehouse/... https://forums.anandtech.com/js/themehouse/watch/action.min.js?_v=fddf0136 — 200 — 1.4 KiB — 28 ms — h2https://www.googletagmanager.com/gtag/js?id=UA-1721979-3www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=UA-1721979-3 — 200 — 124.7 KiB — 118 ms — h2https://cloudmetrics.xenforo.com/js/essential.jscloudmetrics.xenforo.com/js/essenti... https://cloudmetrics.xenforo.com/js/essential.js — 200 — 2.2 KiB — 58 ms — h2https://bordeaux.futurecdn.net/bordeaux.jsbordeaux.futurecdn.net/bordeaux.js https://bordeaux.futurecdn.net/bordeaux.js — 200 — 176.8 KiB — 47 ms — h2https://cdn.onesignal.com/sdks/OneSignalSDK.jscdn.onesignal.com/sdks/OneSignalSDK... https://cdn.onesignal.com/sdks/OneSignalSDK.js — 200 — 3.6 KiB — 42 ms — h3https://assets.purch.com/creative-templates/latest/js/membership/OneSignal/LoadOneSignal.jsassets.purch.com/creative-templates... https://assets.purch.com/creative-templates/latest/js/membership/OneSignal/LoadOneSignal.js — 200 — 2.5 KiB — 107 ms — h2https://forums.anandtech.com/data/files/logo.pngforums.anandtech.com/data/files/log... https://forums.anandtech.com/data/files/logo.png — 200 — 13.8 KiB — 27 ms — h2https://sb.scorecardresearch.com/beacon.jssb.scorecardresearch.com/beacon.js https://sb.scorecardresearch.com/beacon.js — 200 — 6.7 KiB — 28 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-KJCP7P&l=gtmDataLayerwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-KJCP7P&l=gtmDataLayer — 200 — 134.7 KiB — 113 ms — h2https://forums.anandtech.com/data/local/icons/regular.svg?v=1775355241forums.anandtech.com/data/local/ico... https://forums.anandtech.com/data/local/icons/regular.svg?v=1775355241 — 200 — 42.7 KiB — 40 ms — h2https://forums.anandtech.com/styles/fa/solid/caret-down.svg?v=5.15.3forums.anandtech.com/styles/fa/soli... https://forums.anandtech.com/styles/fa/solid/caret-down.svg?v=5.15.3 — 200 — 546 B — 34 ms — h2https://forums.anandtech.com/styles/fa/regular/search.svg?v=5.15.3forums.anandtech.com/styles/fa/regu... https://forums.anandtech.com/styles/fa/regular/search.svg?v=5.15.3 — 200 — 764 B — 35 ms — h2https://anandtech-data.community.forum/avatars/s/4/4696.jpg?1668781521anandtech-data.community.forum/avat... https://anandtech-data.community.forum/avatars/s/4/4696.jpg?1668781521 — 200 — 2.3 KiB — 63 ms — h2https://anandtech-data.community.forum/avatars/s/220/220659.jpg?1563394416anandtech-data.community.forum/avat... https://anandtech-data.community.forum/avatars/s/220/220659.jpg?1563394416 — 200 — 2.1 KiB — 67 ms — h2https://anandtech-data.community.forum/avatars/s/180/180190.jpg?1620966825anandtech-data.community.forum/avat... https://anandtech-data.community.forum/avatars/s/180/180190.jpg?1620966825 — 200 — 1.5 KiB — 73 ms — h2https://anandtech-data.community.forum/avatars/s/293/293403.jpg?1724774028anandtech-data.community.forum/avat... https://anandtech-data.community.forum/avatars/s/293/293403.jpg?1724774028 — 200 — 3.4 KiB — 55 ms — h2https://anandtech-data.community.forum/avatars/s/137/137745.jpg?1568609002anandtech-data.community.forum/avat... https://anandtech-data.community.forum/avatars/s/137/137745.jpg?1568609002 — 200 — 1.9 KiB — 68 ms — h2https://anandtech-data.community.forum/avatars/s/65/65628.jpg?1476739266anandtech-data.community.forum/avat... https://anandtech-data.community.forum/avatars/s/65/65628.jpg?1476739266 — 200 — 6.0 KiB — 45 ms — h2https://forums.anandtech.com/webmanifest.phpforums.anandtech.com/webmanifest.ph... https://forums.anandtech.com/webmanifest.php — 200 — 0 B — 7 ms — h2https://cdn.taboola.com/libtrc/futureplc-network/loader.jscdn.taboola.com/libtrc/futureplc-ne... https://cdn.taboola.com/libtrc/futureplc-network/loader.js — 200 — 331.3 KiB — 80 ms — h2https://anandtech-data.community.forum/avatars/s/514/514066.jpg?1733431145anandtech-data.community.forum/avat... https://anandtech-data.community.forum/avatars/s/514/514066.jpg?1733431145 — 200 — 2.1 KiB — 20 ms — h2
0 ms 500 ms 1.0 s 1.5 s FCP 987 ms LCP 1.3 shttps://anandtech.com// https://anandtech.com/ — 301 — 163 B — 415 ms — h2https://forums.anandtech.com/forums.anandtech.com/ https://forums.anandtech.com/ — 200 — 26.2 KiB — 108 ms — h2https://forums.anandtech.com/css.php?css=public%3Anormalize.css%2Cpublic%3Afa.css%2Cpublic%3Avariations.less%2Cpublic%3Acore.less%2Cpublic%3Aapp.less&s=1&l=1&d=1775944137&k=af958c765bd98cacf1190720e33ad54d4366ea5eforums.anandtech.com/css.php?css=pu... https://forums.anandtech.com/css.php?css=public%3Anormalize.css%2Cpublic%3Afa.css%2Cpublic%3Avariations.less%2Cpublic%3Acore.less%2Cpublic%3Aapp.less&s=1&l=1&d=1775944137&k=af958c765bd98cacf1190720e33ad54d4366ea5e — 200 — 43.1 KiB — 43 ms — h2https://forums.anandtech.com/css.php?css=public%3Anode_list.less%2Cpublic%3Anotices.less%2Cpublic%3Ashare_controls.less%2Cpublic%3Aextra.less&s=1&l=1&d=1775944137&k=f01673533f7c22812e29be29ad29ce51e7367472forums.anandtech.com/css.php?css=pu... https://forums.anandtech.com/css.php?css=public%3Anode_list.less%2Cpublic%3Anotices.less%2Cpublic%3Ashare_controls.less%2Cpublic%3Aextra.less&s=1&l=1&d=1775944137&k=f01673533f7c22812e29be29ad29ce51e7367472 — 200 — 3.0 KiB — 25 ms — h2https://forums.anandtech.com/js/xf/preamble.min.js?_v=fddf0136forums.anandtech.com/js/xf/preamble... https://forums.anandtech.com/js/xf/preamble.min.js?_v=fddf0136 — 200 — 2.0 KiB — 17 ms — h2https://forums.anandtech.com/webmanifest.phpforums.anandtech.com/webmanifest.ph... https://forums.anandtech.com/webmanifest.php — 200 — 665 B — 33 ms — h2https://forums.anandtech.com/js/vendor/vendor-compiled.js?_v=fddf0136forums.anandtech.com/js/vendor/vend... https://forums.anandtech.com/js/vendor/vendor-compiled.js?_v=fddf0136 — 200 — 4.5 KiB — 17 ms — h2https://forums.anandtech.com/js/xf/core-compiled.js?_v=fddf0136forums.anandtech.com/js/xf/core-com... https://forums.anandtech.com/js/xf/core-compiled.js?_v=fddf0136 — 200 — 53.4 KiB — 28 ms — h2https://quantcast.mgr.consensu.org/choice/uer8ZPXHG8WDU/forums.anandtech.com/choice.jsquantcast.mgr.consensu.org/choice/u... https://quantcast.mgr.consensu.org/choice/uer8ZPXHG8WDU/forums.anandtech.com/choice.js — -1 — 0 B — 159 ms — https://forums.anandtech.com/js/themehouse/watch/action.min.js?_v=fddf0136forums.anandtech.com/js/themehouse/... https://forums.anandtech.com/js/themehouse/watch/action.min.js?_v=fddf0136 — 200 — 1.4 KiB — 28 ms — h2https://www.googletagmanager.com/gtag/js?id=UA-1721979-3www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=UA-1721979-3 — 200 — 124.7 KiB — 118 ms — h2https://cloudmetrics.xenforo.com/js/essential.jscloudmetrics.xenforo.com/js/essenti... https://cloudmetrics.xenforo.com/js/essential.js — 200 — 2.2 KiB — 58 ms — h2https://bordeaux.futurecdn.net/bordeaux.jsbordeaux.futurecdn.net/bordeaux.js https://bordeaux.futurecdn.net/bordeaux.js — 200 — 176.8 KiB — 47 ms — h2https://cdn.onesignal.com/sdks/OneSignalSDK.jscdn.onesignal.com/sdks/OneSignalSDK... https://cdn.onesignal.com/sdks/OneSignalSDK.js — 200 — 3.6 KiB — 42 ms — h3https://assets.purch.com/creative-templates/latest/js/membership/OneSignal/LoadOneSignal.jsassets.purch.com/creative-templates... https://assets.purch.com/creative-templates/latest/js/membership/OneSignal/LoadOneSignal.js — 200 — 2.5 KiB — 107 ms — h2https://forums.anandtech.com/data/files/logo.pngforums.anandtech.com/data/files/log... https://forums.anandtech.com/data/files/logo.png — 200 — 13.8 KiB — 27 ms — h2https://sb.scorecardresearch.com/beacon.jssb.scorecardresearch.com/beacon.js https://sb.scorecardresearch.com/beacon.js — 200 — 6.7 KiB — 28 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-KJCP7P&l=gtmDataLayerwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-KJCP7P&l=gtmDataLayer — 200 — 134.7 KiB — 113 ms — 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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 1048ms · 1158KB · €11/mo
forums.anandtech.com
Other
Costly
Execution 269ms
Transfer 26 KB
Monthly Cost €3/mo
Unattributable
Other
Costly
Execution 246ms
Transfer 0 KB
Monthly Cost €3/mo
bordeaux.futurecdn.net
Other
Optional
Execution 99ms
Transfer 177 KB
Unused 55%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 93ms
Transfer 135 KB
Unused 43%
Monthly Cost €1/mo
cdn.taboola.com
Other
Optional
Execution 92ms
Transfer 331 KB
Unused 61%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 73ms
Transfer 125 KB
Unused 55%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 63ms
Transfer 151 KB
Unused 53%
Monthly Cost €1/mo
cdn.onesignal.com
Other
Optional
Execution 62ms
Transfer 69 KB
Unused 66%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 51ms
Transfer 145 KB
Unused 56%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • forums.anandtech.com adds 269ms and costs ~€3/month
  • Unattributable adds 246ms 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

forums.anandtech.com takes 269ms 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

Unattributable takes 246ms 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

55% of bordeaux.futurecdn.net'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

61% of cdn.taboola.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 Google Tag Manager'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

53% of Google Tag Manager'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

66% of cdn.onesignal.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

56% of Google Tag Manager'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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