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https://en.wikipedia.org/wiki/Octopus

Performance

· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
1
REVIEW
7
PASS
13
INFO
4

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

Mobile Desktop
94
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
86
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
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.

1.81 s

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

2.14 s

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

226 ms

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

0.000

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

2.13 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.

5.32 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
25
13 PASS 7 REVIEW 1 FIX
D
JS Execution Cost
Action
2052ms total JS execution
FIX
2052ms total JS execution
Warning::
https://meta.wikimedia.org/w/index.php?title=Speci...: 616ms CPU time
Warning::
https://en.wikipedia.org/wiki/Octopus: 608ms CPU time
Warning::
Unattributable: 382ms CPU time
Info::
https://en.wikipedia.org/w/load.php?lang=en&module...: 238ms CPU time
Info::
https://en.wikipedia.org/w/load.php?lang=en&module...: 209ms CPU time
Info::
Third-party scripts: 998ms (49% of total)

Main Thread Breakdown

Script Evaluation 38% Other 22% Parse HTML & CSS 16% Style & Layout 15% Script Parsing & Compilation 6% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://meta.wikimedia.org/w/index.php?title=Special:BannerLoader&campaign=WMF_FR_FY2526_mlWW_m_0507&banner=B2526_050521_mlWW_m_p1_lg_twn_twin2&uselang=en&debug=false616ms319ms40ms3rd
https://en.wikipedia.org/wiki/Octopus608ms34ms7ms1st
Unattributable382ms6ms0ms3rd
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva238ms183ms5ms1st
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CtestKitchen%2CwikimediaEvents%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.parsermigration.survey%7Cext.quicksurveys.init%2Clib%7Cext.relatedArticles.readMore.bootstrap%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.testKitchen%7Cjquery%2Coojs%2Csite%7Cjquery.client%2Cspinner%2CtextSelection%7Cjquery.spinner.styles%7Cmediawiki.DateFormatter%2CForeignApi%2CString%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctemplate%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts%7Cwikibase.databox.fromWikidata&skin=minerva&version=lru5x209ms114ms82ms1st
B
Third-Party Impact
40% third-party, 0 ms blocking
REVIEW
40% third-party, 0 ms blocking
Info::
Third-party code accounts for 40% of page weight (300.0 KiB of 742.9 KiB)
Info::
Third-party blocking time is low (0 ms)
60%
40%
First-party Third-party
C
Image Optimization
Action
25 images, 0 KB saveable
REVIEW
25 images, 0 KB saveable
Warning::
https://upload.wikimedia.org/wikipedia/donate/6/6b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://upload.wikimedia.org/wikipedia/donate/1/15... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://upload.wikimedia.org/wikipedia/donate/b/b2... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
25 images 246 KB
0 oversized -0 KB
21 legacy format
4 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

Performance issues directly impact user engagement and conversion rates.

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

B
JS Bundles
6 scripts, 78 KB unused
REVIEW
6 scripts, 78 KB unused
Warning::
https://en.wikipedia.org/w/load.php?lang=en&module...: 78 KB unused (37%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 78 KB
78 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CtestKitchen%2CwikimediaEvents%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.parsermigration.survey%7Cext.quicksurveys.init%2Clib%7Cext.relatedArticles.readMore.bootstrap%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.testKitchen%7Cjquery%2Coojs%2Csite%7Cjquery.client%2Cspinner%2CtextSelection%7Cjquery.spinner.styles%7Cmediawiki.DateFormatter%2CForeignApi%2CString%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctemplate%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts%7Cwikibase.databox.fromWikidata&skin=minerva&version=lru5x210 KB78 KB (37%)✓1st
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva22 KB—✓1st
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.gadget.switcher&skin=minerva&version=mygzm2 KB—✓1st
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.visualEditor.core.utils.parsing%7Cext.visualEditor.targetLoader%2Ctrack%2Cve&skin=minerva&version=vb9eu9 KB—✓1st
https://meta.wikimedia.org/w/index.php?title=Special:BannerLoader&campaign=WMF_FR_FY2526_mlWW_m_0507&banner=B2526_050521_mlWW_m_p1_lg_twn_twin2&uselang=en&debug=false73 KB—✓3rd
https://auth.wikimedia.org/metawiki/wiki/Special:CentralAutoLogin/checkLoggedIn?useformat=mobile&wikiid=enwiki&usesul3=1&type=script2 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

B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
private, s-maxage=0, max-age=0, must-revalidate, no-transform
REVIEW
private, s-maxage=0, max-age=0, must-revalidate, no-transform
Info::
Cache-Control header is set
Got: private, s-maxage=0, max-age=0, must-revalidate, no-transform
Info::
Last-Modified header present
Cache-Control

private, s-maxage=0, max-age=0, must-revalidate, no-transform

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
s-maxage0CDN caches for 0 seconds
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
no-transform—
A
Page Weight Budget
743 KB transferred, 41 requests
PASS
743 KB transferred, 41 requests
Info::
Page weighs 2.5 MB (743 KB transferred)
Info::
41 HTTP requests
Info::
Estimated 0.15 g CO2 per page load
743 KB / 2.4 MB budget
743 KB transferred
41 requests
0.15 g CO2 per page load
JavaScript 317.1 KiB 43%
Images 246.4 KiB 33%
HTML 148.8 KiB 20%
CSS 23.4 KiB 3%
Other 4.8 KiB 1%
Other 1.8 KiB 0%
Other 619 B 0%
0 2.4 MB 4.9 MB
Under budget
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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
Page uses 3 resource hint(s)

Current Resource Hints

preconnect
1
preload
—
dns-prefetch
2
prefetch
—

3 resource hints configured

A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: private, s-maxage=0, max-age=0, must-revalidate, no-transform
A+
Server-Timing Observability
2 Server-Timing entries advertised
PASS
2 Server-Timing entries advertised
Info::
Server-Timing header advertises 2 timing entries
A
Page Weight Inventory
41 resources · 743 KB · 78 KB savings available
PASS
41 resources · 743 KB · 78 KB savings available
Info::
Within 1MB page-weight target
Got: 743 KB
Info::
~78 KB of savings available
Warning::
15 third-party resources (40% of weight)
Info::
1 resources over 200KB
41 resources · 742.9 KiB · 15 third-party Within 1MB page-weight target
JavaScript 43% · 317.1 KiB
Image 34% · 250.3 KiB
Document 20% · 149.7 KiB
CSS 3% · 23.4 KiB
Other 0% · 2.4 KiB

~77.9 KiB of savings available

Remove unused JavaScript: 77.9 KiB
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
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
2 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Network Waterfall
41 requests over 766ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.8 s LCP 2.1 shttps://en.wikipedia.org/wiki/Octopus/wiki/Octopus https://en.wikipedia.org/wiki/Octopus — 200 — 148.8 KiB — 168 ms — h2https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.parsoid.styles%7Cext.cite.styles%7Cext.relatedArticles.styles%7Cext.tmh.player.styles%7Cext.wikimediamessages.styles%7Cmediawiki.hlist%7Cmediawiki.skinning.content.parsoid%7Cmobile.init.styles%7Cskins.minerva.amc.styles%7Cskins.minerva.codex.styles%7Cskins.minerva.content.styles.images%7Cskins.minerva.icons%2Cstyles%7Cwikibase.client.init&only=styles&skin=minerva/w/load.php?lang=en&modules=ext.cit... https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.parsoid.styles%7Cext.cite.styles%7Cext.relatedArticles.styles%7Cext.tmh.player.styles%7Cext.wikimediamessages.styles%7Cmediawiki.hlist%7Cmediawiki.skinning.content.parsoid%7Cmobile.init.styles%7Cskins.minerva.amc.styles%7Cskins.minerva.codex.styles%7Cskins.minerva.content.styles.images%7Cskins.minerva.icons%2Cstyles%7Cwikibase.client.init&only=styles&skin=minerva — 200 — 21.7 KiB — 72 ms — h2https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva/w/load.php?lang=en&modules=startup... https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva — 200 — 21.9 KiB — 74 ms — h2https://en.wikipedia.org/w/load.php?lang=en&modules=site.styles&only=styles&skin=minerva/w/load.php?lang=en&modules=site.st... https://en.wikipedia.org/w/load.php?lang=en&modules=site.styles&only=styles&skin=minerva — 200 — 1.7 KiB — 65 ms — h2https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en-25.svg/static/images/mobile/copyright/wik... https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en-25.svg — 200 — 4.9 KiB — 68 ms — h2https://en.wikipedia.org/w/api.php?action=webapp-manifest/w/api.php?action=webapp-manifest https://en.wikipedia.org/w/api.php?action=webapp-manifest — 200 — 1.8 KiB — 91 ms — h2https://upload.wikimedia.org/wikipedia/commons/thumb/5/57/Octopus2.jpg/500px-Octopus2.jpgupload.wikimedia.org/wikipedia/comm... https://upload.wikimedia.org/wikipedia/commons/thumb/5/57/Octopus2.jpg/500px-Octopus2.jpg — 200 — 66.4 KiB — 189 ms — h2https://upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr.svg/40px-OOjs_UI_icon_edit-ltr.svg.pngupload.wikimedia.org/wikipedia/comm... https://upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr.svg/40px-OOjs_UI_icon_edit-ltr.svg.png — 200 — 1.3 KiB — 188 ms — h2https://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Moving_Octopus_Vulgaris_2005-01-14.ogv/250px--Moving_Octopus_Vulgaris_2005-01-14.ogv.jpgupload.wikimedia.org/wikipedia/comm... https://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Moving_Octopus_Vulgaris_2005-01-14.ogv/250px--Moving_Octopus_Vulgaris_2005-01-14.ogv.jpg — 200 — 17.2 KiB — 155 ms — h2https://upload.wikimedia.org/wikipedia/commons/thumb/1/14/Octopus.ogv/250px--Octopus.ogv.jpgupload.wikimedia.org/wikipedia/comm... https://upload.wikimedia.org/wikipedia/commons/thumb/1/14/Octopus.ogv/250px--Octopus.ogv.jpg — 200 — 12.5 KiB — 161 ms — h2https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=menu&format=original&lang=en&skin=minerva&version=1uezz/w/load.php?modules=skins.minerva.i... https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=menu&format=original&lang=en&skin=minerva&version=1uezz — 200 — 1.1 KiB — 36 ms — h2https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=home&format=original&lang=en&skin=minerva&version=1uezz/w/load.php?modules=skins.minerva.i... https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=home&format=original&lang=en&skin=minerva&version=1uezz — 200 — 1.1 KiB — 38 ms — h2https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=die&format=original&lang=en&skin=minerva&version=1uezz/w/load.php?modules=skins.minerva.i... https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=die&format=original&lang=en&skin=minerva&version=1uezz — 200 — 1.1 KiB — 37 ms — h2https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=mapPin&format=original&lang=en&skin=minerva&version=1uezz/w/load.php?modules=skins.minerva.i... https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=mapPin&format=original&lang=en&skin=minerva&version=1uezz — 200 — 1.1 KiB — 39 ms — h2https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=logIn&format=original&lang=en&skin=minerva&version=1uezz/w/load.php?modules=skins.minerva.i... https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=logIn&format=original&lang=en&skin=minerva&version=1uezz — 200 — 1.1 KiB — 42 ms — h2https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=settings&format=original&lang=en&skin=minerva&version=1uezz/w/load.php?modules=skins.minerva.i... https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=settings&format=original&lang=en&skin=minerva&version=1uezz — 200 — 1.2 KiB — 42 ms — h2https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=search&format=original&lang=en&skin=minerva&version=1uezz/w/load.php?modules=skins.minerva.i... https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=search&format=original&lang=en&skin=minerva&version=1uezz — 200 — 1.1 KiB — 39 ms — h2https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=language&format=original&lang=en&skin=minerva&version=1uezz/w/load.php?modules=skins.minerva.i... https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=language&format=original&lang=en&skin=minerva&version=1uezz — 200 — 1.3 KiB — 43 ms — h2https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=star&format=original&lang=en&skin=minerva&version=1uezz/w/load.php?modules=skins.minerva.i... https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=star&format=original&lang=en&skin=minerva&version=1uezz — 200 — 1.1 KiB — 44 ms — h2https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=editLock&format=original&lang=en&skin=minerva&version=1uezz/w/load.php?modules=skins.minerva.i... https://en.wikipedia.org/w/load.php?modules=skins.minerva.icons&image=editLock&format=original&lang=en&skin=minerva&version=1uezz — 200 — 1.2 KiB — 44 ms — h2https://en.wikipedia.org/w/load.php?lang=en&modules=ext.gadget.switcher&skin=minerva&version=mygzm/w/load.php?lang=en&modules=ext.gad... https://en.wikipedia.org/w/load.php?lang=en&modules=ext.gadget.switcher&skin=minerva&version=mygzm — 200 — 1.6 KiB — 34 ms — h2https://en.wikipedia.org/w/load.php?lang=en&modules=ext.visualEditor.core.utils.parsing%7Cext.visualEditor.targetLoader%2Ctrack%2Cve&skin=minerva&version=vb9eu/w/load.php?lang=en&modules=ext.vis... https://en.wikipedia.org/w/load.php?lang=en&modules=ext.visualEditor.core.utils.parsing%7Cext.visualEditor.targetLoader%2Ctrack%2Cve&skin=minerva&version=vb9eu — 200 — 9.0 KiB — 35 ms — 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h2https://upload.wikimedia.org/wikipedia/donate/b/be/Trustly_logos_only.pngupload.wikimedia.org/wikipedia/dona... https://upload.wikimedia.org/wikipedia/donate/b/be/Trustly_logos_only.png — 200 — 14.2 KiB — 49 ms — h2data:image/svg+xml,%3Csvg viewBox='0 0 10 10' xmlns='http://www.w3.org/2000/svg'%3E%3Cg stroke='%23…www.w3.org/2000/svg'%3E%3Cg stroke=... data:image/svg+xml,%3Csvg viewBox='0 0 10 10' xmlns='http://www.w3.org/2000/svg'%3E%3Cg stroke='%23… — 200 — 0 B — 0 ms — datahttps://upload.wikimedia.org/wikipedia/donate/1/15/Charity-navigator.pngupload.wikimedia.org/wikipedia/dona... https://upload.wikimedia.org/wikipedia/donate/1/15/Charity-navigator.png — 200 — 8.0 KiB — 30 ms — h2https://upload.wikimedia.org/wikipedia/donate/6/6b/Candid-seal-platinum-2025.svgupload.wikimedia.org/wikipedia/dona... https://upload.wikimedia.org/wikipedia/donate/6/6b/Candid-seal-platinum-2025.svg — 200 — 5.1 KiB — 32 ms — h2https://en.wikipedia.org/static/favicon/wikipedia.ico/static/favicon/wikipedia.ico https://en.wikipedia.org/static/favicon/wikipedia.ico — 200 — 1.8 KiB — 32 ms — h2https://en.wikipedia.org/static/apple-touch/wikipedia.png/static/apple-touch/wikipedia.png https://en.wikipedia.org/static/apple-touch/wikipedia.png — 200 — 2.1 KiB — 32 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
49% of JavaScript execution is third-party
First-party Third-party 998ms · 73KB · €3/mo
meta.wikimedia.org
Other
Costly
Execution 616ms
Transfer 73 KB
Monthly Cost €2/mo
Unattributable
Other
Costly
Execution 382ms
Transfer 0 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • meta.wikimedia.org adds 616ms and costs ~€2/month
  • Unattributable adds 382ms and costs ~€1/month

49% 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

meta.wikimedia.org takes 616ms 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 382ms 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

Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-04-10 — 2026-05-07)

LCP (p75)

1013 ms

95% good

INP (p75)

87 ms

94% good

CLS (p75)

0.000

92% good

FCP (p75)

992 ms

TTFB (p75)

483 ms

This origin passes Core Web Vitals assessment
Image Optimization
55 images, 591 KB total, 51 KB wasted
INFO

Image Optimization Audit

Total Images

55

Total Size

591 KB

Oversized

13

Wasted

51 KB

20 missing alt text 1 missing dimensions 51 missing lazy loading
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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