https://pl.wikipedia.org
Performance
· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
89
GRADE
B
FIX
0
REVIEW
5
PASS
8
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
99
92
100
77
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
354 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
904 ms
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
19 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
685 ms
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
1.28 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 sChecks
158 PASS 5 REVIEW
BImage Optimization41 images, 0 KB saveableREVIEW
Image Optimization
41 images, 0 KB saveable
41 images, 0 KB saveable
Info::
All images are well-optimized
41 images 206 KB
0 oversized -0 KB
11 legacy format
0 missing dimensions CLS risk
BJS Execution Cost713ms total JS executionREVIEW
JS Execution Cost
713ms total JS execution
713ms total JS execution
Info::
https://pl.wikipedia.org/wiki/Wikipedia:Strona_g%C...: 203ms CPU time
Info::
https://pl.wikipedia.org/w/load.php?lang=pl&module...: 202ms CPU time
Info::
Unattributable: 155ms CPU time
Info::
https://pl.wikipedia.org/w/load.php?lang=pl&module...: 154ms CPU time
Info::
Third-party scripts: 155ms (22% of total)
Main Thread Breakdown
Script Evaluation 52% Other 19% Style & Layout 15% Script Parsing & Compilation 8% Parse HTML & CSS 3%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://pl.wikipedia.org/wiki/Wikipedia:Strona_g%C5%82%C3%B3wna | 203ms | 7ms | 2ms | 1st |
| https://pl.wikipedia.org/w/load.php?lang=pl&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClegacySupport%2CstartUp%7Cext.centralauth.centralautologin%7Cext.checkUser.clientHints%7Cext.cx.eventlogging.campaigns%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CtestKitchen%2CwikimediaEvents%7Cext.eventLogging.metricsPlatform%7Cext.parsermigration.survey%7Cext.scribunto.logs%7Cext.uls.interface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.testKitchen%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CtextSelection%7Cmediawiki.String%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.ready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.databox.fromWikidata&skin=vector-2022&version=1mxe0 | 202ms | 125ms | 31ms | 1st |
| Unattributable | 155ms | 3ms | 0ms | 3rd |
| https://pl.wikipedia.org/w/load.php?lang=pl&modules=startup&only=scripts&raw=1&skin=vector-2022 | 154ms | 126ms | 3ms | 1st |
BJS Bundles10 scripts, 134 KB unusedREVIEW
JS Bundles
10 scripts, 134 KB unused
10 scripts, 134 KB unused
Warning::
https://pl.wikipedia.org/w/load.php?lang=pl&module...: 73 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://pl.wikipedia.org/w/load.php?lang=pl&module...: 33 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://pl.wikipedia.org/w/load.php?lang=pl&module...: 28 KB unused (33%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 134 KB
134 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://pl.wikipedia.org/w/load.php?lang=pl&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClegacySupport%2CstartUp%7Cext.centralauth.centralautologin%7Cext.checkUser.clientHints%7Cext.cx.eventlogging.campaigns%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CtestKitchen%2CwikimediaEvents%7Cext.eventLogging.metricsPlatform%7Cext.parsermigration.survey%7Cext.scribunto.logs%7Cext.uls.interface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.testKitchen%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CtextSelection%7Cmediawiki.String%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.ready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.databox.fromWikidata&skin=vector-2022&version=1mxe0 | 186 KB | 73 KB (40%) | ✓ | 1st |
| https://pl.wikipedia.org/w/load.php?lang=pl&modules=%40wikimedia%2Fcodex%2Ccodex-styles%7Cext.uls.displaysettings%2Clanguagesettings&skin=vector-2022&version=bk8cm | 76 KB | 33 KB (43%) | ✓ | 1st |
| https://pl.wikipedia.org/w/load.php?lang=pl&modules=mediawiki.codex.typeaheadSearch%7Cmediawiki.skinning.typeaheadSearch%7Cskins.vector.search%7Cvue&skin=vector-2022&version=1piqx | 87 KB | 28 KB (33%) | ✓ | 1st |
| https://pl.wikipedia.org/w/load.php?lang=pl&modules=startup&only=scripts&raw=1&skin=vector-2022 | 22 KB | — | ✓ | 1st |
| https://pl.wikipedia.org/w/load.php?lang=pl&modules=ext.gadget.NavFrame%2CWDsearch%2Cally-enhance%2Ccitoid-overrides%2Cedit-first-section%2Cedit-summaries%2Cinterwiki-langlist%2Cll-script-loader%2Cmain-page-js%2Cmap-toggler%2Cmaps%2CnarrowFootnoteColumns%2Cpadlock-indicators%2Cstyle-summary-buttons%2Cszablon-galeria%2CveKeepParameters%2Cwikibugs&skin=vector-2022&version=11c1m | 16 KB | — | ✓ | 1st |
| https://pl.wikipedia.org/w/load.php?lang=pl&modules=ext.visualEditor.core.utils.parsing%7Cext.visualEditor.desktopArticleTarget.init%7Cext.visualEditor.progressBarWidget%2CsupportCheck%2CtargetLoader%2CtempWikitextEditorWidget%2Ctrack%2Cve&skin=vector-2022&version=16sux | 18 KB | — | ✓ | 1st |
| https://pl.wikipedia.org/w/load.php?lang=pl&modules=ext.centralauth.ForeignApi%7Cext.cite.referencePreviews%7Cext.math.popup%7Cext.popups.main%7Cmediawiki.ForeignApi%7Cmediawiki.ForeignApi.core&skin=vector-2022&version=4ayxs | 27 KB | — | ✓ | 1st |
| https://pl.wikipedia.org/w/load.php?lang=pl&modules=mw.config.values.wbCurrentSiteDetails%2CwbRepo%7Coojs-ui.styles.icons-editing-core&skin=vector-2022&version=1ukm1 | 3 KB | — | ✓ | 1st |
| https://auth.wikimedia.org/metawiki/wiki/Special:CentralAutoLogin/checkLoggedIn?useformat=desktop&wikiid=plwiki&usesul3=1&type=script | 1 KB | — | ✓ | 3rd |
| https://pl.wikipedia.org/w/load.php?lang=pl&modules=ext.uls.common%2Ci18n%2Cime%2Clanguagenames%2Cmediawiki%2Cmessages%7Cjquery.i18n%2Cime%2Culs%7Cjquery.uls.data%2Cgrid&skin=vector-2022&version=7n9ri | 64 KB | — | ✓ | 1st |
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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
BHTTP Cachings-maxage=1200, must-revalidate, max-age=0REVIEW
HTTP Caching
s-maxage=1200, must-revalidate, max-age=0
s-maxage=1200, must-revalidate, max-age=0
Info::
Cache-Control header is set
Got: s-maxage=1200, must-revalidate, max-age=0
Info::
CDN TTL: 20 minutes (s-maxage=1200)
Info::
Last-Modified header present
Cache-Control
s-maxage=1200, must-revalidate, max-age=0
| Directive | Value | Meaning |
|---|---|---|
| s-maxage | 1200 | CDN caches for 20 minutes |
| must-revalidate | — | Must recheck with server after expiry |
| max-age | 0 | Cache for 0 seconds |
APage Weight Budget782 KB transferred, 60 requestsPASS
Page Weight Budget
782 KB transferred, 60 requests
782 KB transferred, 60 requests
Info::
Page weighs 2.4 MB (782 KB transferred)
Warning::
JavaScript is 500 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 500 KB
Info::
60 HTTP requests
Info::
Estimated 0.16 g CO2 per page load
782 KB transferred
60 requests
0.16 g CO2 per page load
JavaScript 500.3 KiB 64%
Images 206.0 KiB 26%
HTML 27.3 KiB 3%
CSS 27.3 KiB 3%
Other 13.7 KiB 2%
Other 7.0 KiB 1%
0 2.4 MB 4.9 MB
Under 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
AThird-Party Impact22% third-party, 0 ms blockingPASS
Third-Party Impact
22% third-party, 0 ms blocking
22% third-party, 0 ms blocking
Info::
Third-party code accounts for 22% of page weight (174.0 KiB of 781.6 KiB)
Info::
Third-party blocking time is low (0 ms)
78%
22%
First-party Third-party
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+Font LoadingNo web fonts (system fonts)PASS
Font Loading
No web fonts (system fonts)
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+Resource CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
A+Page Weight Inventory60 resources · 782 KB · 134 KB savings availablePASS
Page Weight Inventory
60 resources · 782 KB · 134 KB savings available
60 resources · 782 KB · 134 KB savings available
Info::
Within 1MB page-weight target
Got: 782 KB
Info::
~134 KB of savings available
Info::
34 third-party resources (22% of weight)
60 resources · 781.6 KiB · 34 third-party Within 1MB page-weight target
JavaScript 64% · 500.3 KiB
Image 27% · 207.8 KiB
Document 4% · 32.5 KiB
CSS 3% · 27.3 KiB
Other 2% · 13.7 KiB
~133.6 KiB of savings available
Remove unused JavaScript: 133.6 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 60 resources | 781.6 KiB | ||||||
Network Waterfall60 requests over 1003msINFO
Network Waterfall
60 requests over 1003ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
22% of JavaScript execution is third-party
First-party Third-party 155ms · 0KB · zł4/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 155ms | 0 KB | — | zł4/mo | Optional |
Unattributable
Other
Execution 155ms
Transfer 0 KB
Monthly Cost zł4/mo
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.