Skip to content
https://iarc.fr

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
5
REVIEW
3
PASS
7
INFO
2

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

Mobile Desktop
63
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
75
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
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.

2.75 s

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

6.60 s

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

234 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.

6.13 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.

13.26 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
7 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
3.3 MB transferred, 108 requests
FIX
3.3 MB transferred, 108 requests
Warning::
Page weighs 4.9 MB (3.3 MB transferred)
Warning::
Images are 2.5 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.5 MB
Warning::
JavaScript is 554 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 554 KB
Warning::
108 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.70 g CO2 per page load
3.3 MB / 2.4 MB budget
3.3 MB transferred
108 requests
0.70 g CO2 per page load
Images 2.5 MiB 75%
JavaScript 553.8 KiB 16%
CSS 145.7 KiB 4%
Fonts 100.8 KiB 3%
HTML 18.5 KiB 1%
Other 14.0 KiB 0%
Other 2.3 KiB 0%
Other 453 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

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

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
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 (3.3 MiB of 3.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2283ms total JS execution
FIX
2283ms total JS execution
Warning::
https://www.iarc.who.int/: 699ms CPU time
Warning::
Unattributable: 566ms CPU time
Warning::
https://www.iarc.who.int/wp-content/themes/iarc-th...: 387ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-END5...: 344ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-PQ9...: 127ms CPU time
Warning::
Third-party scripts: 2283ms (100% of total)

Main Thread Breakdown

Script Evaluation 37% Other 27% Style & Layout 24% Script Parsing & Compilation 6% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://www.iarc.who.int/699ms102ms6ms3rd
Unattributable566ms9ms0ms3rd
https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/jquery-3.3.1.min.js?ver=5.3.2387ms237ms7ms3rd
https://www.googletagmanager.com/gtag/js?id=G-END57GKPMR344ms278ms57ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PQ9TBQ4127ms87ms33ms3rd
https://www.iarc.who.int/wp-includes/js/wp-emoji-release.min.js?ver=5.3.2108ms83ms1ms3rd
https://www.google-analytics.com/analytics.js51ms41ms4ms3rd
D
Page Weight Inventory
Action
108 resources · 3.3 MB · 197 KB savings available
FIX
108 resources · 3.3 MB · 197 KB savings available
Warning::
Page weight 2.3 MB over 1MB target
Got: 3.3 MB Expected: ≤ 1 MB
Info::
~197 KB of savings available
Warning::
107 third-party resources (100% of weight)
108 resources · 3.3 MiB · 107 third-party 2.3 MiB over 1MB target
Image 75% · 2.5 MiB
JavaScript 16% · 553.8 KiB
CSS 4% · 145.7 KiB
Font 3% · 100.8 KiB
Document 1% · 18.8 KiB
Other 0% · 14.4 KiB

~196.8 KiB of savings available

Remove unused JavaScript: 196.8 KiB
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
61 images, 0 KB saveable
REVIEW
61 images, 0 KB saveable
Warning::
https://www.iarc.who.int/wp-content/themes/iarc-th... 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.
61 images 2.5 MB
0 oversized -0 KB
58 legacy format
2 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

Performance issues directly impact user engagement and conversion rates.

C
JS Bundles
Action
22 scripts, 197 KB unused
REVIEW
22 scripts, 197 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PQ9...: 72 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-END5...: 64 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.iarc.who.int/wp-content/themes/iarc-th...: 34 KB unused (88%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.iarc.who.int/wp-includes/js/jquery/jqu...: 26 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 197 KB
197 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-PQ9TBQ4132 KB72 KB (55%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-END57GKPMR158 KB64 KB (41%)✓3rd
https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/swiper.min.js?ver=5.3.239 KB34 KB (88%)✓3rd
https://www.iarc.who.int/wp-includes/js/jquery/jquery.js?ver=1.12.4-wp39 KB26 KB (68%)✓3rd
https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/popper.min.js?ver=5.3.28 KB—✓3rd
https://www.iarc.who.int/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.15 KB—✓3rd
https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/skip-link-focus-fix.js?ver=201512151 KB—✓3rd
https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/chosen.min.js?ver=5.3.28 KB—✓3rd
https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/mCustomScrollbar.min.js?ver=5.3.214 KB—✓3rd
https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/tether.min.js?ver=5.3.29 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

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
3 fonts (101 KB)
PASS
3 fonts (101 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

101 KB total

Render-blocking

0

of 3

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 FCP 2.8 s LCP 6.6 shttps://www.iarc.who.int/wp-content/themes/iarc-theme-new/fonts/Object-Sans-400.woffObject-Sans-400.woff https://www.iarc.who.int/wp-content/themes/iarc-theme-new/fonts/Object-Sans-400.woff — 33.5 KiB — 120 ms — font-display: swaphttps://www.iarc.who.int/wp-content/themes/iarc-theme-new/fonts/Object-Sans-700.woffObject-Sans-700.woff https://www.iarc.who.int/wp-content/themes/iarc-theme-new/fonts/Object-Sans-700.woff — 61.5 KiB — 123 ms — font-display: swaphttps://www.iarc.who.int/wp-content/themes/iarc-theme-new/fonts/icomoon.ttficomoon.ttf https://www.iarc.who.int/wp-content/themes/iarc-theme-new/fonts/icomoon.ttf — 5.8 KiB — 110 ms — font-display: swap
Object-Sans-400.woff woff swap
Size 33 KB
Load time 120 ms
Start 755 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Object-Sans-700.woff woff swap
Size 62 KB
Load time 123 ms
Start 755 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
icomoon.ttf ttf swap
Size 6 KB
Load time 110 ms
Start 756 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 ~30 KB and ~60 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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
—
preload
—
dns-prefetch
2
prefetch
—

2 resource hints configured

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
108 requests over 1140ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 2.8 s LCP 6.6 shttps://iarc.fr// https://iarc.fr/ — 303 — 267 B — 125 ms — http/1.1https://www.iarc.who.int/www.iarc.who.int/ https://www.iarc.who.int/ — 200 — 18.5 KiB — 362 ms — h2https://www.googletagmanager.com/gtag/js?id=G-END57GKPMRwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-END57GKPMR — 200 — 157.7 KiB — 194 ms — h2https://www.iarc.who.int/wp-includes/css/dist/block-library/style.min.css?ver=5.3.2www.iarc.who.int/wp-includes/css/di... https://www.iarc.who.int/wp-includes/css/dist/block-library/style.min.css?ver=5.3.2 — 200 — 7.8 KiB — 41 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/chosen.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/chosen.css?ver=5.3.2 — 200 — 3.4 KiB — 39 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/mCustomScrollbar.min.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/mCustomScrollbar.min.css?ver=5.3.2 — 200 — 5.8 KiB — 46 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/bootstrap.min.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/bootstrap.min.css?ver=5.3.2 — 200 — 27.8 KiB — 58 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/slick.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/slick.css?ver=5.3.2 — 200 — 1.0 KiB — 61 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/slick-theme.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/slick-theme.css?ver=5.3.2 — 200 — 1.4 KiB — 36 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/icomoon.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/icomoon.css?ver=5.3.2 — 200 — 1.1 KiB — 34 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/swiper.min.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/swiper.min.css?ver=5.3.2 — 200 — 4.0 KiB — 45 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/cookieconsent.min.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/cookieconsent.min.css?ver=5.3.2 — 200 — 2.4 KiB — 63 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/simplelightbox.min.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/simplelightbox.min.css?ver=5.3.2 — 200 — 1.3 KiB — 40 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/style.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/style.css?ver=5.3.2 — 200 — 665 B — 57 ms — h2https://www.iarc.who.int/wp-content/plugins/google-analytics-dashboard-for-wp/assets/js/frontend.min.js?ver=6.0.2www.iarc.who.int/wp-content/plugins... https://www.iarc.who.int/wp-content/plugins/google-analytics-dashboard-for-wp/assets/js/frontend.min.js?ver=6.0.2 — 200 — 3.3 KiB — 64 ms — h2https://www.iarc.who.int/wp-includes/js/jquery/jquery.js?ver=1.12.4-wpwww.iarc.who.int/wp-includes/js/jqu... https://www.iarc.who.int/wp-includes/js/jquery/jquery.js?ver=1.12.4-wp — 200 — 39.0 KiB — 67 ms — h2https://www.iarc.who.int/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1www.iarc.who.int/wp-includes/js/jqu... https://www.iarc.who.int/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1 — 200 — 4.6 KiB — 58 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/logo.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/logo.svg — 200 — 21.0 KiB — 88 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/logo-white.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/logo-white.svg — 200 — 20.9 KiB — 91 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/base-new.csswww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/base-new.css — 200 — 34.0 KiB — 75 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/header-vertical.csswww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/header-vertical.css — 200 — 2.7 KiB — 56 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/header-home-page.csswww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/header-home-page.css — 200 — 1.6 KiB — 53 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/responsive.csswww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/responsive.css — 200 — 7.8 KiB — 52 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/print.csswww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/print.css — 200 — 1.4 KiB — 49 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/new-design.csswww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/new-design.css — 200 — 41.5 KiB — 72 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/03/Banner_homepage-World-Health-Day-2026.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/03/Banner_homepage-World-Health-Day-2026.jpg — 200 — 138.2 KiB — 117 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/03/homepage_banner_141.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/03/homepage_banner_141.jpg — 200 — 159.4 KiB — 97 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/02/cytoST_IARC-homepage.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/02/cytoST_IARC-homepage.jpg — 200 — 118.8 KiB — 132 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/jquery-3.3.1.min.js?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/jquery-3.3.1.min.js?ver=5.3.2 — 200 — 35.0 KiB — 108 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/navigation.js?ver=20151215www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/navigation.js?ver=20151215 — 200 — 1.6 KiB — 68 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 2.8 s LCP 6.6 shttps://iarc.fr// https://iarc.fr/ — 303 — 267 B — 125 ms — http/1.1https://www.iarc.who.int/www.iarc.who.int/ https://www.iarc.who.int/ — 200 — 18.5 KiB — 362 ms — h2https://www.googletagmanager.com/gtag/js?id=G-END57GKPMRwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-END57GKPMR — 200 — 157.7 KiB — 194 ms — h2https://www.iarc.who.int/wp-includes/css/dist/block-library/style.min.css?ver=5.3.2www.iarc.who.int/wp-includes/css/di... https://www.iarc.who.int/wp-includes/css/dist/block-library/style.min.css?ver=5.3.2 — 200 — 7.8 KiB — 41 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/chosen.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/chosen.css?ver=5.3.2 — 200 — 3.4 KiB — 39 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/mCustomScrollbar.min.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/mCustomScrollbar.min.css?ver=5.3.2 — 200 — 5.8 KiB — 46 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/bootstrap.min.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/bootstrap.min.css?ver=5.3.2 — 200 — 27.8 KiB — 58 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/slick.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/slick.css?ver=5.3.2 — 200 — 1.0 KiB — 61 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/slick-theme.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/slick-theme.css?ver=5.3.2 — 200 — 1.4 KiB — 36 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/icomoon.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/icomoon.css?ver=5.3.2 — 200 — 1.1 KiB — 34 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/swiper.min.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/swiper.min.css?ver=5.3.2 — 200 — 4.0 KiB — 45 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/cookieconsent.min.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/cookieconsent.min.css?ver=5.3.2 — 200 — 2.4 KiB — 63 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/simplelightbox.min.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/css/simplelightbox.min.css?ver=5.3.2 — 200 — 1.3 KiB — 40 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/style.css?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/style.css?ver=5.3.2 — 200 — 665 B — 57 ms — h2https://www.iarc.who.int/wp-content/plugins/google-analytics-dashboard-for-wp/assets/js/frontend.min.js?ver=6.0.2www.iarc.who.int/wp-content/plugins... https://www.iarc.who.int/wp-content/plugins/google-analytics-dashboard-for-wp/assets/js/frontend.min.js?ver=6.0.2 — 200 — 3.3 KiB — 64 ms — h2https://www.iarc.who.int/wp-includes/js/jquery/jquery.js?ver=1.12.4-wpwww.iarc.who.int/wp-includes/js/jqu... https://www.iarc.who.int/wp-includes/js/jquery/jquery.js?ver=1.12.4-wp — 200 — 39.0 KiB — 67 ms — h2https://www.iarc.who.int/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1www.iarc.who.int/wp-includes/js/jqu... https://www.iarc.who.int/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1 — 200 — 4.6 KiB — 58 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/logo.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/logo.svg — 200 — 21.0 KiB — 88 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/logo-white.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/logo-white.svg — 200 — 20.9 KiB — 91 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/base-new.csswww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/base-new.css — 200 — 34.0 KiB — 75 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/header-vertical.csswww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/header-vertical.css — 200 — 2.7 KiB — 56 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/header-home-page.csswww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/header-home-page.css — 200 — 1.6 KiB — 53 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/responsive.csswww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/responsive.css — 200 — 7.8 KiB — 52 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/print.csswww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/print.css — 200 — 1.4 KiB — 49 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/new-design.csswww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/new-design.css — 200 — 41.5 KiB — 72 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/03/Banner_homepage-World-Health-Day-2026.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/03/Banner_homepage-World-Health-Day-2026.jpg — 200 — 138.2 KiB — 117 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/03/homepage_banner_141.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/03/homepage_banner_141.jpg — 200 — 159.4 KiB — 97 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/02/cytoST_IARC-homepage.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/02/cytoST_IARC-homepage.jpg — 200 — 118.8 KiB — 132 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/jquery-3.3.1.min.js?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/jquery-3.3.1.min.js?ver=5.3.2 — 200 — 35.0 KiB — 108 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/navigation.js?ver=20151215www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/navigation.js?ver=20151215 — 200 — 1.6 KiB — 68 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/skip-link-focus-fix.js?ver=20151215www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/skip-link-focus-fix.js?ver=20151215 — 200 — 867 B — 62 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/chosen.min.js?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/chosen.min.js?ver=5.3.2 — 200 — 8.4 KiB — 74 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/mCustomScrollbar.min.js?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/mCustomScrollbar.min.js?ver=5.3.2 — 200 — 14.1 KiB — 65 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/tether.min.js?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/tether.min.js?ver=5.3.2 — 200 — 8.9 KiB — 71 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/popper.min.js?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/popper.min.js?ver=5.3.2 — 200 — 8.0 KiB — 83 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/bootstrap.min.js?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/bootstrap.min.js?ver=5.3.2 — 200 — 16.2 KiB — 153 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/slick.min.js?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/slick.min.js?ver=5.3.2 — 200 — 13.4 KiB — 77 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/swiper.min.js?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/swiper.min.js?ver=5.3.2 — 200 — 39.0 KiB — 113 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/simple-lightbox.min.js?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/simple-lightbox.min.js?ver=5.3.2 — 200 — 4.1 KiB — 94 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/cookieconsent.min.js?ver=5.3.2www.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/cookieconsent.min.js?ver=5.3.2 — 200 — 7.8 KiB — 86 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/custom-new.jswww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/js/custom-new.js — 200 — 30.3 KiB — 143 ms — h2https://www.iarc.who.int/wp-includes/js/wp-embed.min.js?ver=5.3.2www.iarc.who.int/wp-includes/js/wp-... https://www.iarc.who.int/wp-includes/js/wp-embed.min.js?ver=5.3.2 — 200 — 1.2 KiB — 92 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/01/Homepage_banner-IICC2026.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/01/Homepage_banner-IICC2026.jpg — 200 — 103.9 KiB — 216 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/GCO-vignette-homepage.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/GCO-vignette-homepage.jpg — 200 — 67.8 KiB — 208 ms — h2https://www.iarc.who.int/wp-content/uploads/2024/07/recent-covers-monographs.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2024/07/recent-covers-monographs.jpg — 200 — 71.7 KiB — 214 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/04/biobankIARC-2026-vignette.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/04/biobankIARC-2026-vignette.jpg — 200 — 61.9 KiB — 220 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/04/Vignette_journal-JNCI-MONOGRAPHS.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/04/Vignette_journal-JNCI-MONOGRAPHS.jpg — 200 — 20.6 KiB — 168 ms — h2https://www.iarc.who.int/wp-content/uploads/2025/09/ESB6-Vignette_op1.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2025/09/ESB6-Vignette_op1.jpg — 200 — 58.9 KiB — 210 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/04/world-healthday-iarc-oms.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/04/world-healthday-iarc-oms.jpg — 200 — 73.8 KiB — 213 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/03/vignette-pr378-ECAC5.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/03/vignette-pr378-ECAC5.jpg — 200 — 85.5 KiB — 201 ms — h2https://www.iarc.who.int/wp-content/uploads/2025/07/pr368_vignette.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2025/07/pr368_vignette.jpg — 200 — 85.9 KiB — 206 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/01/IICC2026-vignette2.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/01/IICC2026-vignette2.jpg — 200 — 53.5 KiB — 214 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/01/WCD2026-vignette02.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/01/WCD2026-vignette02.jpg — 200 — 80.4 KiB — 218 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/newsletter-photo-card-web.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/newsletter-photo-card-web.jpg — 200 — 54.1 KiB — 164 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/03/vignette_featured-news-world-health-day-2026.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/03/vignette_featured-news-world-health-day-2026.jpg — 200 — 76.6 KiB — 217 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/03/vignette-featurednews-mono141.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/03/vignette-featurednews-mono141.jpg — 200 — 54.6 KiB — 196 ms — h2https://www.iarc.who.int/wp-content/uploads/2021/09/vignette-brief-series-publications.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2021/09/vignette-brief-series-publications.jpg — 200 — 50.8 KiB — 193 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/02/cytoST_Publications-carousel.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/02/cytoST_Publications-carousel.jpg — 200 — 62.3 KiB — 194 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/02/Publications-carousel_137.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/02/Publications-carousel_137.jpg — 200 — 60.5 KiB — 216 ms — h2https://www.iarc.who.int/wp-content/uploads/2025/12/Publications-carousel-BB-eyes-2025.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2025/12/Publications-carousel-BB-eyes-2025.jpg — 200 — 58.1 KiB — 202 ms — h2https://www.iarc.who.int/wp-content/uploads/2026/04/Vignette-for-IARC-publications-2026.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2026/04/Vignette-for-IARC-publications-2026.jpg — 200 — 63.9 KiB — 202 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/mono-handbooks-poster.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/mono-handbooks-poster.jpg — 200 — 83.8 KiB — 202 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/infographics-photo-card.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/infographics-photo-card.jpg — 200 — 50.1 KiB — 202 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/videos-photo-card.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/videos-photo-card.jpg — 200 — 58.8 KiB — 202 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/10/iarc-video.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/10/iarc-video.jpg — 200 — 64.0 KiB — 214 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/ibb-collections.jpegwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/ibb-collections.jpeg — 200 — 27.0 KiB — 173 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/homepage-research-websites.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/homepage-research-websites.jpg — 200 — 97.6 KiB — 214 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-PQ9TBQ4www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-PQ9TBQ4 — 200 — 132.2 KiB — 121 ms — h2https://www.google-analytics.com/analytics.jswww.google-analytics.com/analytics.... https://www.google-analytics.com/analytics.js — 200 — 20.9 KiB — 127 ms — h2https://www.iarc.who.int/wp-includes/js/wp-emoji-release.min.js?ver=5.3.2www.iarc.who.int/wp-includes/js/wp-... https://www.iarc.who.int/wp-includes/js/wp-emoji-release.min.js?ver=5.3.2 — 200 — 5.5 KiB — 129 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/summer-school-lcb-website.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/summer-school-lcb-website.jpg — 200 — 58.4 KiB — 199 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/etr-elearning-web.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/etr-elearning-web.jpg — 200 — 61.3 KiB — 211 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/doc.svgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/doc.svg — 200 — 824 B — 141 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/dir-gc62-vignette2020-web.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/dir-gc62-vignette2020-web.jpg — 200 — 65.8 KiB — 212 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/mts-web-photo-card.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/mts-web-photo-card.jpg — 200 — 63.4 KiB — 205 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/governance.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/governance.jpg — 200 — 72.7 KiB — 211 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/nc-vignette.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/nc-vignette.jpg — 200 — 65.1 KiB — 204 ms — h2https://www.iarc.who.int/wp-content/uploads/2023/02/graphic-sample.jpgwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2023/02/graphic-sample.jpg — 200 — 20.5 KiB — 203 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/burger.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/burger.svg — 200 — 2.2 KiB — 146 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/bg-misc-points.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/bg-misc-points.svg — 200 — 7.0 KiB — 147 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/bg-misc-points-2.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/bg-misc-points-2.svg — 200 — 7.3 KiB — 149 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/round-bg-arrow-left.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/round-bg-arrow-left.svg — 200 — 1.5 KiB — 154 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/round-bg-arrow-right.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/round-bg-arrow-right.svg — 200 — 1.5 KiB — 164 ms — h2data:image/svg+xml,%3Csvg fill='none' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 61 60'%3E%3Cp…www.w3.org/2000/svg' viewBox='0 0 6... data:image/svg+xml,%3Csvg fill='none' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 61 60'%3E%3Cp… — 200 — 0 B — 0 ms — datahttps://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/twitter-round.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/twitter-round.svg — 200 — 3.4 KiB — 171 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/youtube-round.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/youtube-round.svg — 200 — 5.6 KiB — 159 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/linkedin-round.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/linkedin-round.svg — 200 — 5.1 KiB — 175 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/facebook-round.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/facebook-round.svg — 200 — 7.0 KiB — 180 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/instagram-round.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/instagram-round.svg — 200 — 9.9 KiB — 153 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/iarc-web-tv-round.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/iarc-web-tv-round.svg — 200 — 7.4 KiB — 163 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/twitter.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/twitter.svg — 200 — 913 B — 167 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/youtube.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/youtube.svg — 200 — 1.5 KiB — 164 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/linkedin.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/linkedin.svg — 200 — 1.5 KiB — 154 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/facebook.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/facebook.svg — 200 — 1019 B — 174 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/instagram.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/instagram.svg — 200 — 3.0 KiB — 170 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/iarc-web-tv.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/iarc-web-tv.svg — 200 — 4.5 KiB — 175 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/arrow-up-footer.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/arrow-up-footer.svg — 200 — 969 B — 176 ms — h2data:image/svg+xml,%3Csvg fill='none' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 327 175'%3E%3…www.w3.org/2000/svg' viewBox='0 0 3... data:image/svg+xml,%3Csvg fill='none' xmlns='http://www.w3.org/2000/svg' viewBox='0 0 327 175'%3E%3… — 200 — 0 B — 0 ms — datahttps://www.iarc.who.int/wp-content/themes/iarc-theme-new/fonts/Object-Sans-400.woffwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/fonts/Object-Sans-400.woff — 200 — 33.5 KiB — 120 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/fonts/Object-Sans-700.woffwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/fonts/Object-Sans-700.woff — 200 — 61.5 KiB — 123 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/fonts/icomoon.ttfwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/fonts/icomoon.ttf — 200 — 5.8 KiB — 110 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-END57GKPMR&gtm=45je64k0v899384480za200zd899384480&_p=1776889217232&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_geo=1&_rdi=1&are=1&cid=2016892659.1776889218&frm=0&pscdl=noapi&rcb=11&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266400~117512543~118463261&sid=1776889217&sct=1&seg=0&dl=https%3A%2F%2Fwww.iarc.who.int%2F&dt=IARC%20%E2%80%93%20INTERNATIONAL%20AGENCY%20FOR%20RESEARCH%20ON%20CANCER&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=928region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-END57GKPMR&gtm=45je64k0v899384480za200zd899384480&_p=1776889217232&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_geo=1&_rdi=1&are=1&cid=2016892659.1776889218&frm=0&pscdl=noapi&rcb=11&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266400~117512543~118463261&sid=1776889217&sct=1&seg=0&dl=https%3A%2F%2Fwww.iarc.who.int%2F&dt=IARC%20%E2%80%93%20INTERNATIONAL%20AGENCY%20FOR%20RESEARCH%20ON%20CANCER&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=928 — 204 — 550 B — 97 ms — h2https://cdnjs.cloudflare.com/ajax/libs/jquery-mousewheel/3.1.13/jquery.mousewheel.min.jscdnjs.cloudflare.com/ajax/libs/jque... https://cdnjs.cloudflare.com/ajax/libs/jquery-mousewheel/3.1.13/jquery.mousewheel.min.js — 200 — 1.7 KiB — 89 ms — h2https://webapi.iarc.who.int/refman/api/recent_pubwebapi.iarc.who.int/refman/api/rece... https://webapi.iarc.who.int/refman/api/recent_pub — 200 — 13.4 KiB — 139 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/rss.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/rss.svg — 200 — 1.3 KiB — 24 ms — h2https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/print.svgwww.iarc.who.int/wp-content/themes/... https://www.iarc.who.int/wp-content/themes/iarc-theme-new/images/layout/print.svg — 200 — 1.3 KiB — 25 ms — h2https://www.google-analytics.com/j/collect?v=1&_v=j102&a=1075740053&t=pageview&_s=1&dl=https%3A%2F%2Fwww.iarc.who.int%2F&ul=en-us&dt=IARC%20%E2%80%93%20INTERNATIONAL%20AGENCY%20FOR%20RESEARCH%20ON%20CANCER&sr=412x823&vp=412x823&_u=YADAAUABCAAAACAAI~&jid=1348349887&gjid=364665851&cid=2016892659.1776889218&tid=UA-120005283-1&_gid=91268496.1776889218&_r=1&_slc=1&z=1717423394www.google-analytics.com/j/collect?... https://www.google-analytics.com/j/collect?v=1&_v=j102&a=1075740053&t=pageview&_s=1&dl=https%3A%2F%2Fwww.iarc.who.int%2F&ul=en-us&dt=IARC%20%E2%80%93%20INTERNATIONAL%20AGENCY%20FOR%20RESEARCH%20ON%20CANCER&sr=412x823&vp=412x823&_u=YADAAUABCAAAACAAI~&jid=1348349887&gjid=364665851&cid=2016892659.1776889218&tid=UA-120005283-1&_gid=91268496.1776889218&_r=1&_slc=1&z=1717423394 — 200 — 453 B — 25 ms — h2https://www.iarc.who.int/wp-content/uploads/2018/07/cropped-Selection_999182_-32x32.pngwww.iarc.who.int/wp-content/uploads... https://www.iarc.who.int/wp-content/uploads/2018/07/cropped-Selection_999182_-32x32.png — 200 — 2.0 KiB — 26 ms — h2
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 2283ms · 370KB · €25/mo
www.iarc.who.int
Other
Costly
Execution 699ms
Transfer 19 KB
Monthly Cost €8/mo
Unattributable
Other
Costly
Execution 566ms
Transfer 0 KB
Monthly Cost €6/mo
www.iarc.who.int
Other
Costly
Execution 387ms
Transfer 35 KB
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 344ms
Transfer 158 KB
Unused 41%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Optional
Execution 127ms
Transfer 132 KB
Unused 55%
Monthly Cost €1/mo
www.iarc.who.int
Other
Optional
Execution 108ms
Transfer 6 KB
Monthly Cost €1/mo
Google Analytics
Analytics
Optional
Execution 51ms
Transfer 21 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.iarc.who.int adds 699ms and costs ~€8/month
  • Unattributable adds 566ms and costs ~€6/month
  • www.iarc.who.int adds 387ms and costs ~€4/month
  • Google Tag Manager adds 344ms and costs ~€4/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

www.iarc.who.int takes 699ms 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 566ms 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

www.iarc.who.int takes 387ms 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

Google Tag Manager takes 344ms 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 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.

Send Feedback