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https://inria.fr

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
3
REVIEW
4
PASS
8
INFO
2

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

Mobile Desktop
49
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.

2.43 s

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

7.42 s

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

818 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.

5.27 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.

7.42 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
17
8 PASS 4 REVIEW 3 FIX
F
Page Weight Budget
Action
2.9 MB transferred, 105 requests
FIX
2.9 MB transferred, 105 requests
Warning::
Page weighs 5.3 MB (2.9 MB transferred)
Warning::
Images are 2.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.1 MB
Info::
Fonts are 207 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 207 KB
Warning::
105 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.61 g CO2 per page load
2.9 MB / 2.4 MB budget
2.9 MB transferred
105 requests
0.61 g CO2 per page load
Images 2.1 MiB 73%
JavaScript 487.3 KiB 16%
Fonts 206.8 KiB 7%
CSS 79.8 KiB 3%
HTML 22.8 KiB 1%
Other 1.7 KiB 0%
Other 702 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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
JS Execution Cost
Action
3071ms total JS execution
FIX
3071ms total JS execution
Warning::
https://inria.fr/themes/custom/inria/js/script.js?...: 818ms CPU time
Warning::
Unattributable: 717ms CPU time
Warning::
https://inria.fr/fr: 535ms CPU time
Warning::
https://inria.fr/modules/custom/inria_banner/js/in...: 268ms CPU time
Info::
https://inria.fr/themes/custom/inria/js/libs/jquer...: 171ms CPU time
Info::
Third-party scripts: 902ms (29% of total)

Main Thread Breakdown

Script Evaluation 36% Other 28% Style & Layout 19% Script Parsing & Compilation 9% Parse HTML & CSS 7%
ScriptTotalScriptingParse/CompileParty
https://inria.fr/themes/custom/inria/js/script.js?tdtruy818ms536ms53ms1st
Unattributable717ms28ms0ms3rd
https://inria.fr/fr535ms72ms3ms1st
https://inria.fr/modules/custom/inria_banner/js/inria-banner.js?tdtruy268ms13ms1ms1st
https://inria.fr/themes/custom/inria/js/libs/jquery.min.js?v=3.7.1171ms113ms22ms1st
https://inria.fr/core/misc/drupal.init.js?v=11.3.5106ms96ms1ms1st
https://inria.fr/themes/custom/inria/css/style.css?tdtruy102ms0ms0ms1st
https://piwik.inria.fr/js/container_jXx4kt38.js99ms60ms39ms3rd
https://inria.fr/modules/contrib/tacjs/assets/vendor/tarteaucitron.js/tarteaucitron.js?v=1.20.098ms60ms26ms1st
https://piwik.inria.fr/matomo.js86ms74ms11ms3rd

Showing top 10 of 11 scripts

D
JS Bundles
Action
39 scripts, 188 KB unused
FIX
39 scripts, 188 KB unused
Warning::
https://piwik.inria.fr/js/container_jXx4kt38.js: 82 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://inria.fr/themes/custom/inria/js/script.js?...: 41 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://inria.fr/themes/custom/inria/js/script.js?...: unminified — 28 KB could be saved
Warning::
https://piwik.inria.fr/matomo.js: 36 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://inria.fr/modules/contrib/tacjs/assets/vend...: 29 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://inria.fr/modules/contrib/tacjs/assets/vend...: unminified — 11 KB could be saved
Info::
Total unused JavaScript: 188 KB
188 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://piwik.inria.fr/js/container_jXx4kt38.js157 KB82 KB (52%)✓3rd
https://inria.fr/themes/custom/inria/js/script.js?tdtruy77 KB41 KB (53%)✗1st
https://piwik.inria.fr/matomo.js67 KB36 KB (54%)✓3rd
https://inria.fr/modules/contrib/tacjs/assets/vendor/tarteaucitron.js/tarteaucitron.services.js?v=1.20.040 KB29 KB (74%)✗1st
https://inria.fr/themes/custom/inria/js/libs/stickybits.min.js?tdtruy2 KB—✓1st
https://inria.fr/core/misc/drupalSettingsLoader.js?v=11.3.50 KB—✓1st
https://inria.fr/core/misc/drupal.init.js?v=11.3.51 KB—✓1st
https://inria.fr/core/misc/debounce.js?v=11.3.51 KB—✓1st
https://inria.fr/modules/contrib/jquery_ui/assets/vendor/jquery.ui/ui/version-min.js?v=1.13.20 KB—✓1st
https://inria.fr/modules/contrib/jquery_ui/assets/vendor/jquery.ui/ui/keycode-min.js?v=1.13.20 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

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
Image Optimization
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Info::
All images are well-optimized
17 images 2.1 MB
0 oversized -0 KB
16 legacy format
0 missing dimensions CLS risk
C
Page Weight Inventory
Action
105 resources · 2.9 MB · 188 KB savings available
REVIEW
105 resources · 2.9 MB · 188 KB savings available
Warning::
Page weight 1.9 MB over 1MB target
Got: 2.9 MB Expected: ≤ 1 MB
Info::
~188 KB of savings available
Info::
7 third-party resources (8% of weight)
Info::
2 resources over 200KB
105 resources · 2.9 MiB · 7 third-party 1.9 MiB over 1MB target
Image 73% · 2.1 MiB
JavaScript 16% · 487.3 KiB
Font 7% · 206.8 KiB
CSS 3% · 79.8 KiB
Document 1% · 23.1 KiB
Other 0% · 702 B

~187.9 KiB of savings available

Remove unused JavaScript: 187.9 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
must-revalidate, no-cache, private
REVIEW
must-revalidate, no-cache, private
Info::
Cache-Control header is set
Got: must-revalidate, no-cache, private
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

must-revalidate, no-cache, private

DirectiveValueMeaning
must-revalidate—Must recheck with server after expiry
no-cache—Cache but always revalidate first
private—Only browser cache, not CDN/proxy
A+
Third-Party Impact
8% third-party, 0 ms blocking
PASS
8% third-party, 0 ms blocking
Info::
Third-party code accounts for 8% of page weight (230.5 KiB of 2.9 MiB)
Info::
Third-party blocking time is low (0 ms)
92%
First-party Third-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+
Font Loading
6 fonts (207 KB)
PASS
6 fonts (207 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

207 KB total

Render-blocking

0

of 6

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 2.4 s LCP 7.4 shttps://inria.fr/themes/custom/inria/fonts/InriaSans-Regular.woffInriaSans-Regular.woff https://inria.fr/themes/custom/inria/fonts/InriaSans-Regular.woff — 33.3 KiB — 20 ms — font-display: swaphttps://inria.fr/themes/custom/inria/fonts/InriaSerif-Regular.woffInriaSerif-Regular.woff https://inria.fr/themes/custom/inria/fonts/InriaSerif-Regular.woff — 38.6 KiB — 26 ms — font-display: swaphttps://inria.fr/themes/custom/inria/fonts/InriaSans-Bold.woffInriaSans-Bold.woff https://inria.fr/themes/custom/inria/fonts/InriaSans-Bold.woff — 31.8 KiB — 26 ms — font-display: swaphttps://inria.fr/themes/custom/inria/fonts/InriaSerif-Bold.woffInriaSerif-Bold.woff https://inria.fr/themes/custom/inria/fonts/InriaSerif-Bold.woff — 36.2 KiB — 30 ms — font-display: swaphttps://inria.fr/themes/custom/inria/fonts/InriaSans-Italic.woffInriaSans-Italic.woff https://inria.fr/themes/custom/inria/fonts/InriaSans-Italic.woff — 34.9 KiB — 27 ms — font-display: swaphttps://inria.fr/themes/custom/inria/fonts/InriaSans-Light.woffInriaSans-Light.woff https://inria.fr/themes/custom/inria/fonts/InriaSans-Light.woff — 31.9 KiB — 31 ms — font-display: swap
InriaSans-Regular.woff woff swap
Size 33 KB
Load time 20 ms
Start 471 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
InriaSerif-Regular.woff woff swap
Size 39 KB
Load time 26 ms
Start 471 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
InriaSans-Bold.woff woff swap
Size 32 KB
Load time 26 ms
Start 472 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
InriaSerif-Bold.woff woff swap
Size 36 KB
Load time 30 ms
Start 473 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
InriaSans-Italic.woff woff swap
Size 35 KB
Load time 27 ms
Start 473 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
InriaSans-Light.woff woff swap
Size 32 KB
Load time 31 ms
Start 474 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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 ~62 KB and ~124 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
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
Network Waterfall
105 requests over 1444ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 2.4 s LCP 7.4 shttps://inria.fr// https://inria.fr/ — 301 — 306 B — 84 ms — h2https://inria.fr/fr/fr https://inria.fr/fr — 200 — 22.8 KiB — 46 ms — h2https://inria.fr/core/modules/system/css/components/align.module.css?tdtruy/core/modules/system/css/components... https://inria.fr/core/modules/system/css/components/align.module.css?tdtruy — 200 — 340 B — 32 ms — h2https://inria.fr/core/modules/system/css/components/container-inline.module.css?tdtruy/core/modules/system/css/components... https://inria.fr/core/modules/system/css/components/container-inline.module.css?tdtruy — 200 — 224 B — 40 ms — h2https://inria.fr/core/modules/system/css/components/clearfix.module.css?tdtruy/core/modules/system/css/components... https://inria.fr/core/modules/system/css/components/clearfix.module.css?tdtruy — 200 — 277 B — 41 ms — h2https://inria.fr/core/modules/system/css/components/hidden.module.css?tdtruy/core/modules/system/css/components... https://inria.fr/core/modules/system/css/components/hidden.module.css?tdtruy — 200 — 710 B — 42 ms — h2https://inria.fr/core/modules/system/css/components/js.module.css?tdtruy/core/modules/system/css/components... https://inria.fr/core/modules/system/css/components/js.module.css?tdtruy — 200 — 400 B — 46 ms — h2https://inria.fr/modules/contrib/antibot/css/antibot.css?tdtruy/modules/contrib/antibot/css/antibo... https://inria.fr/modules/contrib/antibot/css/antibot.css?tdtruy — 200 — 327 B — 53 ms — h2https://inria.fr/modules/contrib/jquery_ui/assets/vendor/jquery.ui/themes/base/core.css?tdtruy/modules/contrib/jquery_ui/assets/v... https://inria.fr/modules/contrib/jquery_ui/assets/vendor/jquery.ui/themes/base/core.css?tdtruy — 200 — 771 B — 53 ms — h2https://inria.fr/modules/contrib/jquery_ui/assets/vendor/jquery.ui/themes/base/datepicker.css?tdtruy/modules/contrib/jquery_ui/assets/v... https://inria.fr/modules/contrib/jquery_ui/assets/vendor/jquery.ui/themes/base/datepicker.css?tdtruy — 200 — 1.0 KiB — 45 ms — h2https://inria.fr/modules/custom/inria_banner/css/inria-banner.css?tdtruy/modules/custom/inria_banner/css/in... https://inria.fr/modules/custom/inria_banner/css/inria-banner.css?tdtruy — 200 — 62 B — 48 ms — h2https://inria.fr/core/modules/views/css/views.module.css?tdtruy/core/modules/views/css/views.modul... https://inria.fr/core/modules/views/css/views.module.css?tdtruy — 200 — 270 B — 39 ms — h2https://inria.fr/modules/contrib/better_exposed_filters/css/better_exposed_filters.css?tdtruy/modules/contrib/better_exposed_fil... https://inria.fr/modules/contrib/better_exposed_filters/css/better_exposed_filters.css?tdtruy — 200 — 314 B — 65 ms — h2https://inria.fr/modules/contrib/jquery_ui/assets/vendor/jquery.ui/themes/base/theme.css?tdtruy/modules/contrib/jquery_ui/assets/v... https://inria.fr/modules/contrib/jquery_ui/assets/vendor/jquery.ui/themes/base/theme.css?tdtruy — 200 — 3.1 KiB — 68 ms — h2https://inria.fr/modules/contrib/extlink/css/extlink.css?tdtruy/modules/contrib/extlink/css/extlin... https://inria.fr/modules/contrib/extlink/css/extlink.css?tdtruy — 200 — 553 B — 65 ms — h2https://inria.fr/modules/custom/inria_admin/css/media.css?tdtruy/modules/custom/inria_admin/css/med... https://inria.fr/modules/custom/inria_admin/css/media.css?tdtruy — 200 — 243 B — 71 ms — h2https://inria.fr/modules/contrib/paragraphs/css/paragraphs.unpublished.css?tdtruy/modules/contrib/paragraphs/css/par... https://inria.fr/modules/contrib/paragraphs/css/paragraphs.unpublished.css?tdtruy — 200 — 130 B — 68 ms — h2https://inria.fr/modules/contrib/tacjs/assets/vendor/tarteaucitron.js/css/tarteaucitron.css?tdtruy/modules/contrib/tacjs/assets/vendo... https://inria.fr/modules/contrib/tacjs/assets/vendor/tarteaucitron.js/css/tarteaucitron.css?tdtruy — 200 — 5.1 KiB — 76 ms — h2https://inria.fr/themes/custom/inria/css/style.css?tdtruy/themes/custom/inria/css/style.css?... https://inria.fr/themes/custom/inria/css/style.css?tdtruy — 200 — 65.2 KiB — 96 ms — h2https://inria.fr/themes/custom/inria/css/demo.css?tdtruy/themes/custom/inria/css/demo.css?t... https://inria.fr/themes/custom/inria/css/demo.css?tdtruy — 200 — 911 B — 76 ms — h2https://inria.fr/themes/custom/inria/logo/logo.svg/themes/custom/inria/logo/logo.svg https://inria.fr/themes/custom/inria/logo/logo.svg — 200 — 17.5 KiB — 76 ms — h2https://inria.fr/themes/custom/inria/js/libs/jquery.min.js?v=3.7.1/themes/custom/inria/js/libs/jquery... https://inria.fr/themes/custom/inria/js/libs/jquery.min.js?v=3.7.1 — 200 — 29.8 KiB — 84 ms — h2https://inria.fr/core/assets/vendor/underscore/underscore-min.js?v=1.13.7/core/assets/vendor/underscore/unde... https://inria.fr/core/assets/vendor/underscore/underscore-min.js?v=1.13.7 — 200 — 7.4 KiB — 104 ms — h2https://inria.fr/core/assets/vendor/once/once.min.js?v=1.0.1/core/assets/vendor/once/once.min.j... https://inria.fr/core/assets/vendor/once/once.min.js?v=1.0.1 — 200 — 756 B — 82 ms — h2https://inria.fr/sites/default/files/languages/fr_YmB5-atmxQxqgnUIlZlZok6e0Dm6WqRVmPhaaFHsNIw.js?tdtruy/sites/default/files/languages/fr_Y... https://inria.fr/sites/default/files/languages/fr_YmB5-atmxQxqgnUIlZlZok6e0Dm6WqRVmPhaaFHsNIw.js?tdtruy — 200 — 5.5 KiB — 104 ms — h2https://inria.fr/core/misc/drupalSettingsLoader.js?v=11.3.5/core/misc/drupalSettingsLoader.js?... https://inria.fr/core/misc/drupalSettingsLoader.js?v=11.3.5 — 200 — 446 B — 104 ms — h2https://inria.fr/core/misc/drupal.js?v=11.3.5/core/misc/drupal.js?v=11.3.5 https://inria.fr/core/misc/drupal.js?v=11.3.5 — 200 — 6.1 KiB — 104 ms — h2https://inria.fr/core/misc/drupal.init.js?v=11.3.5/core/misc/drupal.init.js?v=11.3.5 https://inria.fr/core/misc/drupal.init.js?v=11.3.5 — 200 — 549 B — 104 ms — h2https://inria.fr/core/misc/debounce.js?v=11.3.5/core/misc/debounce.js?v=11.3.5 https://inria.fr/core/misc/debounce.js?v=11.3.5 — 200 — 723 B — 103 ms — h2https://inria.fr/modules/contrib/jquery_ui/assets/vendor/jquery.ui/ui/version-min.js?v=1.13.2/modules/contrib/jquery_ui/assets/v... https://inria.fr/modules/contrib/jquery_ui/assets/vendor/jquery.ui/ui/version-min.js?v=1.13.2 — 200 — 225 B — 103 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 2.4 s LCP 7.4 shttps://inria.fr// https://inria.fr/ — 301 — 306 B — 84 ms — h2https://inria.fr/fr/fr https://inria.fr/fr — 200 — 22.8 KiB — 46 ms — h2https://inria.fr/core/modules/system/css/components/align.module.css?tdtruy/core/modules/system/css/components... https://inria.fr/core/modules/system/css/components/align.module.css?tdtruy — 200 — 340 B — 32 ms — h2https://inria.fr/core/modules/system/css/components/container-inline.module.css?tdtruy/core/modules/system/css/components... https://inria.fr/core/modules/system/css/components/container-inline.module.css?tdtruy — 200 — 224 B — 40 ms — h2https://inria.fr/core/modules/system/css/components/clearfix.module.css?tdtruy/core/modules/system/css/components... https://inria.fr/core/modules/system/css/components/clearfix.module.css?tdtruy — 200 — 277 B — 41 ms — h2https://inria.fr/core/modules/system/css/components/hidden.module.css?tdtruy/core/modules/system/css/components... 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http/1.1https://piwik.inria.fr/piwik.php?e_c=Section&e_a=Accueil&e_n=&e_v=&ca=1&idsite=27&rec=1&r=466596&h=21&m=50&s=17&url=https%3A%2F%2Finria.fr%2Ffr&_id=&_idn=1&send_image=0&_refts=0&dimension1=Accueil&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Not-A.Brand%22%2C%22version%22%3A%2224.0.0.0%22%7D%2C%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22146.0.7680.164%22%7D%5D%2C%22mobile%22%3Atrue%2C%22model%22%3A%22moto%20g%20power%20(2022)%22%2C%22platform%22%3A%22Android%22%2C%22platformVersion%22%3A%2211.0%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=412x823piwik.inria.fr/piwik.php?e_c=Sectio... https://piwik.inria.fr/piwik.php?e_c=Section&e_a=Accueil&e_n=&e_v=&ca=1&idsite=27&rec=1&r=466596&h=21&m=50&s=17&url=https%3A%2F%2Finria.fr%2Ffr&_id=&_idn=1&send_image=0&_refts=0&dimension1=Accueil&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Not-A.Brand%22%2C%22version%22%3A%2224.0.0.0%22%7D%2C%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22146.0.7680.164%22%7D%5D%2C%22mobile%22%3Atrue%2C%22model%22%3A%22moto%20g%20power%20(2022)%22%2C%22platform%22%3A%22Android%22%2C%22platformVersion%22%3A%2211.0%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=412x823 — 204 — 351 B — 111 ms — http/1.1https://browser-update.org/update.min.jsbrowser-update.org/update.min.js https://browser-update.org/update.min.js — 200 — 4.6 KiB — 26 ms — h2https://inria.fr/themes/custom/inria/logo/logo.svg/themes/custom/inria/logo/logo.svg https://inria.fr/themes/custom/inria/logo/logo.svg — 200 — 0 B — 3 ms — h2https://inria.fr/themes/custom/inria/logo/logo.svg/themes/custom/inria/logo/logo.svg https://inria.fr/themes/custom/inria/logo/logo.svg — 200 — 0 B — 5 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAHcAAAAeCAYAAAAWwoEYAAADl0lEQVRoge1Y0W3bQAx9CjKARlC+9…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAHcAAAAeCAYAAAAWwoEYAAADl0lEQVRoge1Y0W3bQAx9CjKARlC+9… — 200 — 0 B — 0 ms — datahttps://inria.fr/themes/custom/inria/images/favicon.ico/themes/custom/inria/images/favicon... https://inria.fr/themes/custom/inria/images/favicon.ico — 200 — 1.4 KiB — 18 ms — h2https://inria.fr/sites/default/files/styles/crop_landing_home/public/2019-11/ecosysteme_512x514_0.png?itok=70crq32U/sites/default/files/styles/crop_la... https://inria.fr/sites/default/files/styles/crop_landing_home/public/2019-11/ecosysteme_512x514_0.png?itok=70crq32U — 200 — 305.6 KiB — 131 ms — h2https://inria.fr/sites/default/files/styles/crop_landing_home/public/2019-11/recherche_1860x1030_1.png?itok=HfC33PlI/sites/default/files/styles/crop_la... https://inria.fr/sites/default/files/styles/crop_landing_home/public/2019-11/recherche_1860x1030_1.png?itok=HfC33PlI — 200 — 1.7 MiB — 118 ms — h2https://inria.fr/sites/default/files/styles/crop_banner/public/2026-04/Image1.jpg?h=5f218b44&itok=E2ij7xjW/sites/default/files/styles/crop_ba... https://inria.fr/sites/default/files/styles/crop_banner/public/2026-04/Image1.jpg?h=5f218b44&itok=E2ij7xjW — 200 — 145.0 KiB — 135 ms — h2https://inria.fr/sites/default/files/2024-05/logo-institut-carnot-inria.png/sites/default/files/2024-05/logo-i... https://inria.fr/sites/default/files/2024-05/logo-institut-carnot-inria.png — 200 — 11.5 KiB — 135 ms — h2https://inria.fr/sites/default/files/2024-05/Footer_HR_logo_260.png/sites/default/files/2024-05/Footer... https://inria.fr/sites/default/files/2024-05/Footer_HR_logo_260.png — 200 — 1.9 KiB — 137 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
29% of JavaScript execution is third-party
First-party Third-party 902ms · 224KB · €10/mo
Unattributable
Other
Costly
Execution 717ms
Transfer 0 KB
Monthly Cost €8/mo
piwik.inria.fr
Other
Optional
Execution 99ms
Transfer 157 KB
Unused 52%
Monthly Cost €1/mo
piwik.inria.fr
Other
Optional
Execution 86ms
Transfer 67 KB
Unused 54%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 717ms and costs ~€8/month

Unattributable takes 717ms 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

52% of piwik.inria.fr'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

54% of piwik.inria.fr'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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