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https://weblate.org

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
96
GRADE
A
FIX
1
REVIEW
2
PASS
10
INFO
2

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

Mobile Desktop
100
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
78
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.
83
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.

303 ms

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

343 ms

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

0 ms

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

0.012

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

419 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.

343 ms

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
10 PASS 2 REVIEW 1 FIX
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.

C
Image Optimization
Action
24 images, 0 KB saveable
REVIEW
24 images, 0 KB saveable
Warning::
https://weblate.org/static/img/logo-opensuse.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://weblate.org/static/img/logo-freedombox.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://weblate.org/static/img/logo-collabora.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://weblate.org/static/img/logo-libreoffice.sv... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://weblate.org/static/img/logo-fedora.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
24 images 74 KB
0 oversized -0 KB
20 legacy format
5 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
647 KB transferred, 37 requests
PASS
647 KB transferred, 37 requests
Info::
Page weighs 784 KB (647 KB transferred)
Info::
Fonts are 528 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 528 KB
Info::
37 HTTP requests
Info::
Estimated 0.13 g CO2 per page load
647 KB / 2.4 MB budget
647 KB transferred
37 requests
0.13 g CO2 per page load
Fonts 527.6 KiB 82%
Images 74.5 KiB 12%
CSS 28.9 KiB 4%
HTML 7.5 KiB 1%
JavaScript 5.5 KiB 1%
Other 2.2 KiB 0%
Other 1.0 KiB 0%
0 2.4 MB 4.9 MB
Under budget

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

A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
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+
JS Execution Cost
170ms total JS execution
PASS
170ms total JS execution
Info::
Unattributable: 89ms CPU time
Info::
https://weblate.org/en/: 81ms CPU time
Warning::
Third-party scripts: 89ms (52% of total)

Main Thread Breakdown

Other 53% Style & Layout 33% Rendering 8% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
Unattributable89ms2ms0ms3rd
https://weblate.org/en/81ms1ms0ms1st
A+
Font Loading
5 fonts (528 KB)
PASS
5 fonts (528 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

528 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 303 ms LCP 343 mshttps://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Semibold.ttf.woff2SourceSans3-Semibold.tt... https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Semibold.ttf.woff2 — 106.7 KiB — 74 ms — font-display: swaphttps://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Regular.ttf.woff2SourceSans3-Regular.ttf... https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Regular.ttf.woff2 — 107.4 KiB — 77 ms — font-display: swaphttps://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Bold.ttf.woff2SourceSans3-Bold.ttf.woff2 https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Bold.ttf.woff2 — 106.4 KiB — 109 ms — font-display: swaphttps://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-ExtraLight.ttf.woff2SourceSans3-ExtraLight.... https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-ExtraLight.ttf.woff2 — 101.2 KiB — 108 ms — font-display: swaphttps://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Light.ttf.woff2SourceSans3-Light.ttf.w... https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Light.ttf.woff2 — 105.9 KiB — 108 ms — font-display: swap
SourceSans3-Semibold.tt... woff2 swap
Size 107 KB
Load time 74 ms
Start 423 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
SourceSans3-Regular.ttf... woff2 swap
Size 107 KB
Load time 77 ms
Start 423 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
SourceSans3-Bold.ttf.woff2 woff2 swap
Size 106 KB
Load time 109 ms
Start 424 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
SourceSans3-ExtraLight.... woff2 swap
Size 101 KB
Load time 108 ms
Start 424 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
SourceSans3-Light.ttf.w... woff2 swap
Size 106 KB
Load time 108 ms
Start 424 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~264 KB and ~528 ms

A+
JS Bundles
1 scripts, 0 KB unused
PASS
1 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://weblate.org/static/CACHE/js/output.bd47045a3676.js6 KB—✓1st
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+
Page Weight Inventory
37 resources · 647 KB · 0 KB savings available
PASS
37 resources · 647 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 647 KB
37 resources · 647.3 KiB · 0 third-party Within 1MB page-weight target
Font 82% · 527.6 KiB
Image 12% · 75.8 KiB
CSS 4% · 28.9 KiB
Document 1% · 8.3 KiB
JavaScript 1% · 5.5 KiB
Other 0% · 1.0 KiB
Network Waterfall
37 requests over 584ms
INFO
0 ms 200 ms 400 ms 600 ms FCP 303 ms LCP 343 mshttps://weblate.org// https://weblate.org/ — 302 — 818 B — 148 ms — h2https://weblate.org/en//en/ https://weblate.org/en/ — 200 — 7.5 KiB — 95 ms — h2https://weblate.org/static/CACHE/css/output.32126f04eeb1.css/static/CACHE/css/output.32126f04ee... https://weblate.org/static/CACHE/css/output.32126f04eeb1.css — 200 — 27.9 KiB — 73 ms — h2https://weblate.org/static/weblate_fonts/source-sans-3.css/static/weblate_fonts/source-sans-3... https://weblate.org/static/weblate_fonts/source-sans-3.css — 200 — 508 B — 73 ms — h2https://weblate.org/static/weblate_fonts/source-code-pro.css/static/weblate_fonts/source-code-p... https://weblate.org/static/weblate_fonts/source-code-pro.css — 200 — 535 B — 74 ms — h2https://weblate.org/static/img/icon-localization.svg/static/img/icon-localization.svg https://weblate.org/static/img/icon-localization.svg — 200 — 1.0 KiB — 72 ms — h2https://weblate.org/static/img/icon-checks.svg/static/img/icon-checks.svg https://weblate.org/static/img/icon-checks.svg — 200 — 445 B — 73 ms — h2https://weblate.org/static/img/icon-attribution.svg/static/img/icon-attribution.svg https://weblate.org/static/img/icon-attribution.svg — 200 — 530 B — 59 ms — h2https://weblate.org/static/img/icon-hosting.svg/static/img/icon-hosting.svg https://weblate.org/static/img/icon-hosting.svg — 200 — 466 B — 58 ms — h2https://weblate.org/static/img/icon-cloud.svg/static/img/icon-cloud.svg https://weblate.org/static/img/icon-cloud.svg — 200 — 496 B — 56 ms — h2https://weblate.org/static/CACHE/js/output.bd47045a3676.js/static/CACHE/js/output.bd47045a367... https://weblate.org/static/CACHE/js/output.bd47045a3676.js — 200 — 5.5 KiB — 59 ms — h2https://weblate.org/static/img/icon-software.svg/static/img/icon-software.svg https://weblate.org/static/img/icon-software.svg — 200 — 465 B — 62 ms — h2https://weblate.org/static/img/logo-opensuse.svg/static/img/logo-opensuse.svg https://weblate.org/static/img/logo-opensuse.svg — 200 — 3.2 KiB — 60 ms — h2https://weblate.org/static/img/logo-libreoffice.svg/static/img/logo-libreoffice.svg https://weblate.org/static/img/logo-libreoffice.svg — 200 — 4.0 KiB — 63 ms — h2https://weblate.org/static/img/logo-fedora.svg/static/img/logo-fedora.svg https://weblate.org/static/img/logo-fedora.svg — 200 — 2.3 KiB — 80 ms — h2https://weblate.org/static/img/logo-freedombox.svg/static/img/logo-freedombox.svg https://weblate.org/static/img/logo-freedombox.svg — 200 — 3.0 KiB — 64 ms — h2https://weblate.org/static/img/logo-collabora.svg/static/img/logo-collabora.svg https://weblate.org/static/img/logo-collabora.svg — 200 — 1.5 KiB — 81 ms — h2https://weblate.org/site.webmanifest/site.webmanifest https://weblate.org/site.webmanifest — 200 — 1.0 KiB — 137 ms — h2https://weblate.org/static/img/logo.svg?e44b1845eeec/static/img/logo.svg?e44b1845eeec https://weblate.org/static/img/logo.svg?e44b1845eeec — 200 — 1.5 KiB — 38 ms — h2https://weblate.org/static/img/icon-user.svg?1aac2da75a13/static/img/icon-user.svg?1aac2da75... https://weblate.org/static/img/icon-user.svg?1aac2da75a13 — 200 — 405 B — 40 ms — h2https://weblate.org/static/img/main-box.jpg?44fd18aa240f/static/img/main-box.jpg?44fd18aa24... https://weblate.org/static/img/main-box.jpg?44fd18aa240f — 200 — 32.3 KiB — 42 ms — h2https://weblate.org/static/img/world-map.png?27b0ca9559b1/static/img/world-map.png?27b0ca955... https://weblate.org/static/img/world-map.png?27b0ca9559b1 — 200 — 5.9 KiB — 46 ms — h2https://weblate.org/img/activity.svg/img/activity.svg https://weblate.org/img/activity.svg — 200 — 1.6 KiB — 73 ms — h2https://weblate.org/static/img/box-join.jpg?44fd18aa240f/static/img/box-join.jpg?44fd18aa24... https://weblate.org/static/img/box-join.jpg?44fd18aa240f — 200 — 8.2 KiB — 47 ms — h2https://weblate.org/static/img/box-donate.jpg?44fd18aa240f/static/img/box-donate.jpg?44fd18aa... https://weblate.org/static/img/box-donate.jpg?44fd18aa240f — 200 — 3.9 KiB — 49 ms — h2https://weblate.org/static/img/icon-linkedin.svg?1aac2da75a13/static/img/icon-linkedin.svg?1aac2... https://weblate.org/static/img/icon-linkedin.svg?1aac2da75a13 — 200 — 526 B — 54 ms — h2https://weblate.org/static/img/icon-twitter.svg?2429281807a5/static/img/icon-twitter.svg?242928... https://weblate.org/static/img/icon-twitter.svg?2429281807a5 — 200 — 453 B — 55 ms — h2https://weblate.org/static/img/icon-mastodon.svg?61a40b4aa30d/static/img/icon-mastodon.svg?61a40... https://weblate.org/static/img/icon-mastodon.svg?61a40b4aa30d — 200 — 634 B — 56 ms — h2https://weblate.org/static/img/icon-facebook.svg?1aac2da75a13/static/img/icon-facebook.svg?1aac2... https://weblate.org/static/img/icon-facebook.svg?1aac2da75a13 — 200 — 524 B — 59 ms — h2https://weblate.org/static/img/icon-github.svg?1aac2da75a13/static/img/icon-github.svg?1aac2da... https://weblate.org/static/img/icon-github.svg?1aac2da75a13 — 200 — 798 B — 60 ms — h2
0 ms 200 ms 400 ms 600 ms FCP 303 ms LCP 343 mshttps://weblate.org// https://weblate.org/ — 302 — 818 B — 148 ms — h2https://weblate.org/en//en/ https://weblate.org/en/ — 200 — 7.5 KiB — 95 ms — h2https://weblate.org/static/CACHE/css/output.32126f04eeb1.css/static/CACHE/css/output.32126f04ee... https://weblate.org/static/CACHE/css/output.32126f04eeb1.css — 200 — 27.9 KiB — 73 ms — h2https://weblate.org/static/weblate_fonts/source-sans-3.css/static/weblate_fonts/source-sans-3... https://weblate.org/static/weblate_fonts/source-sans-3.css — 200 — 508 B — 73 ms — h2https://weblate.org/static/weblate_fonts/source-code-pro.css/static/weblate_fonts/source-code-p... https://weblate.org/static/weblate_fonts/source-code-pro.css — 200 — 535 B — 74 ms — h2https://weblate.org/static/img/icon-localization.svg/static/img/icon-localization.svg https://weblate.org/static/img/icon-localization.svg — 200 — 1.0 KiB — 72 ms — h2https://weblate.org/static/img/icon-checks.svg/static/img/icon-checks.svg https://weblate.org/static/img/icon-checks.svg — 200 — 445 B — 73 ms — h2https://weblate.org/static/img/icon-attribution.svg/static/img/icon-attribution.svg https://weblate.org/static/img/icon-attribution.svg — 200 — 530 B — 59 ms — h2https://weblate.org/static/img/icon-hosting.svg/static/img/icon-hosting.svg https://weblate.org/static/img/icon-hosting.svg — 200 — 466 B — 58 ms — h2https://weblate.org/static/img/icon-cloud.svg/static/img/icon-cloud.svg https://weblate.org/static/img/icon-cloud.svg — 200 — 496 B — 56 ms — h2https://weblate.org/static/CACHE/js/output.bd47045a3676.js/static/CACHE/js/output.bd47045a367... https://weblate.org/static/CACHE/js/output.bd47045a3676.js — 200 — 5.5 KiB — 59 ms — h2https://weblate.org/static/img/icon-software.svg/static/img/icon-software.svg https://weblate.org/static/img/icon-software.svg — 200 — 465 B — 62 ms — h2https://weblate.org/static/img/logo-opensuse.svg/static/img/logo-opensuse.svg https://weblate.org/static/img/logo-opensuse.svg — 200 — 3.2 KiB — 60 ms — h2https://weblate.org/static/img/logo-libreoffice.svg/static/img/logo-libreoffice.svg https://weblate.org/static/img/logo-libreoffice.svg — 200 — 4.0 KiB — 63 ms — h2https://weblate.org/static/img/logo-fedora.svg/static/img/logo-fedora.svg https://weblate.org/static/img/logo-fedora.svg — 200 — 2.3 KiB — 80 ms — h2https://weblate.org/static/img/logo-freedombox.svg/static/img/logo-freedombox.svg https://weblate.org/static/img/logo-freedombox.svg — 200 — 3.0 KiB — 64 ms — h2https://weblate.org/static/img/logo-collabora.svg/static/img/logo-collabora.svg https://weblate.org/static/img/logo-collabora.svg — 200 — 1.5 KiB — 81 ms — h2https://weblate.org/site.webmanifest/site.webmanifest https://weblate.org/site.webmanifest — 200 — 1.0 KiB — 137 ms — h2https://weblate.org/static/img/logo.svg?e44b1845eeec/static/img/logo.svg?e44b1845eeec https://weblate.org/static/img/logo.svg?e44b1845eeec — 200 — 1.5 KiB — 38 ms — h2https://weblate.org/static/img/icon-user.svg?1aac2da75a13/static/img/icon-user.svg?1aac2da75... https://weblate.org/static/img/icon-user.svg?1aac2da75a13 — 200 — 405 B — 40 ms — h2https://weblate.org/static/img/main-box.jpg?44fd18aa240f/static/img/main-box.jpg?44fd18aa24... https://weblate.org/static/img/main-box.jpg?44fd18aa240f — 200 — 32.3 KiB — 42 ms — h2https://weblate.org/static/img/world-map.png?27b0ca9559b1/static/img/world-map.png?27b0ca955... https://weblate.org/static/img/world-map.png?27b0ca9559b1 — 200 — 5.9 KiB — 46 ms — h2https://weblate.org/img/activity.svg/img/activity.svg https://weblate.org/img/activity.svg — 200 — 1.6 KiB — 73 ms — h2https://weblate.org/static/img/box-join.jpg?44fd18aa240f/static/img/box-join.jpg?44fd18aa24... https://weblate.org/static/img/box-join.jpg?44fd18aa240f — 200 — 8.2 KiB — 47 ms — h2https://weblate.org/static/img/box-donate.jpg?44fd18aa240f/static/img/box-donate.jpg?44fd18aa... https://weblate.org/static/img/box-donate.jpg?44fd18aa240f — 200 — 3.9 KiB — 49 ms — h2https://weblate.org/static/img/icon-linkedin.svg?1aac2da75a13/static/img/icon-linkedin.svg?1aac2... https://weblate.org/static/img/icon-linkedin.svg?1aac2da75a13 — 200 — 526 B — 54 ms — h2https://weblate.org/static/img/icon-twitter.svg?2429281807a5/static/img/icon-twitter.svg?242928... https://weblate.org/static/img/icon-twitter.svg?2429281807a5 — 200 — 453 B — 55 ms — h2https://weblate.org/static/img/icon-mastodon.svg?61a40b4aa30d/static/img/icon-mastodon.svg?61a40... https://weblate.org/static/img/icon-mastodon.svg?61a40b4aa30d — 200 — 634 B — 56 ms — h2https://weblate.org/static/img/icon-facebook.svg?1aac2da75a13/static/img/icon-facebook.svg?1aac2... https://weblate.org/static/img/icon-facebook.svg?1aac2da75a13 — 200 — 524 B — 59 ms — h2https://weblate.org/static/img/icon-github.svg?1aac2da75a13/static/img/icon-github.svg?1aac2da... https://weblate.org/static/img/icon-github.svg?1aac2da75a13 — 200 — 798 B — 60 ms — h2https://weblate.org/static/img/arrow-down.svg?1aac2da75a13/static/img/arrow-down.svg?1aac2da7... https://weblate.org/static/img/arrow-down.svg?1aac2da75a13 — 200 — 374 B — 69 ms — h2https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Semibold.ttf.woff2/static/weblate_fonts/source-sans/w... https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Semibold.ttf.woff2 — 200 — 106.7 KiB — 74 ms — h2https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Regular.ttf.woff2/static/weblate_fonts/source-sans/w... https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Regular.ttf.woff2 — 200 — 107.4 KiB — 77 ms — h2https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Bold.ttf.woff2/static/weblate_fonts/source-sans/w... https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Bold.ttf.woff2 — 200 — 106.4 KiB — 109 ms — h2https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-ExtraLight.ttf.woff2/static/weblate_fonts/source-sans/w... https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-ExtraLight.ttf.woff2 — 200 — 101.2 KiB — 108 ms — h2https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Light.ttf.woff2/static/weblate_fonts/source-sans/w... https://weblate.org/static/weblate_fonts/source-sans/woff2/SourceSans3-Light.ttf.woff2 — 200 — 105.9 KiB — 108 ms — h2https://weblate.org/static/logo-32.png/static/logo-32.png https://weblate.org/static/logo-32.png — 200 — 1.4 KiB — 37 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
52% of JavaScript execution is third-party
First-party Third-party 89ms · 0KB · €1/mo
Unattributable
Other
Optional
Execution 89ms
Transfer 0 KB
Monthly Cost €1/mo

52% 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

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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