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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
5
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
25
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
67
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
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.

8.43 s

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

12.46 s

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

8.85 s

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

0.006

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

13.23 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.

18.47 s

Page Load Progression

2.5 s
5.0 s
7.5 s
10.0 s
12.4 s
14.9 s
17.4 s
19.9 s
Checks
15
6 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
9.5 MB transferred, 94 requests
FIX
9.5 MB transferred, 94 requests
Critical::
Page weighs 16.2 MB (9.5 MB transferred)
Warning::
Images are 8.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 8.1 MB
Warning::
JavaScript is 950 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 950 KB
Info::
94 HTTP requests
Info::
Estimated 2.0 g CO2 per page load
9.5 MB / 2.4 MB budget
9.5 MB transferred
94 requests
2.0 g CO2 per page load
Images 8.1 MiB 85%
JavaScript 950.2 KiB 10%
Other 267.9 KiB 3%
Fonts 113.3 KiB 1%
CSS 93.3 KiB 1%
HTML 11.8 KiB 0%
Other 1.1 KiB 0%
Other 1.0 KiB 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

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 (9.5 MiB of 9.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
13252ms total JS execution
FIX
13252ms total JS execution
Warning::
https://www.wto.org/library/events/interactive_cal...: 6022ms CPU time
Warning::
https://www.wto.org/: 5923ms CPU time
Warning::
https://www.wto.org/library/wtomenus/common_logic_...: 786ms CPU time
Info::
Unattributable: 246ms CPU time
Info::
https://www.wto.org/cdn-cgi/challenge-platform/scr...: 139ms CPU time
Warning::
Third-party scripts: 13252ms (100% of total)

Main Thread Breakdown

Script Evaluation 95%
ScriptTotalScriptingParse/CompileParty
https://www.wto.org/library/events/interactive_cal_code.js6022ms6015ms6ms3rd
https://www.wto.org/5923ms5682ms2ms3rd
https://www.wto.org/library/wtomenus/common_logic_e.js786ms785ms1ms3rd
Unattributable246ms1ms0ms3rd
https://www.wto.org/cdn-cgi/challenge-platform/scripts/jsd/main.js139ms132ms3ms3rd
https://www.googletagmanager.com/gtag/js?id=G-4C48KGVJMD82ms64ms14ms3rd
https://www.wto.org/library/photo_gallery/slideshow_data.js55ms4ms51ms3rd
D
Page Weight Inventory
Action
94 resources · 9.5 MB · 133 KB savings available
FIX
94 resources · 9.5 MB · 133 KB savings available
Warning::
Page weight 8.5 MB over 1MB target
Got: 9.5 MB Expected: ≤ 1 MB
Info::
~133 KB of savings available
Warning::
93 third-party resources (100% of weight)
Info::
4 resources over 200KB
94 resources · 9.5 MiB · 93 third-party 8.5 MiB over 1MB target
Image 85% · 8.1 MiB
JavaScript 10% · 950.2 KiB
Other 3% · 268.5 KiB
Font 1% · 113.3 KiB
CSS 1% · 93.3 KiB
Document 0% · 13.2 KiB

~132.8 KiB of savings available

Remove unused JavaScript: 132.8 KiB
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-cache, no-store, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache, no-store, must-revalidate

DirectiveValueMeaning
no-cache—Cache but always revalidate first
no-store—Never cache this response
must-revalidate—Must recheck with server after expiry
C
Image Optimization
Action
19 images, 0 KB saveable
REVIEW
19 images, 0 KB saveable
Warning::
https://www.wto.org/images/img_index/photos/dgno_5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/mc12/webcasting.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/mc14/mc14-calendaricon.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/mc14/media.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/wtomenus/logo_en.gif is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/flickr.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/img_index/photos/Robert... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/mc14/mc14-logisticsicon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/mc14/mc14homebfnotes.gi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/mc14/homeclosingphotomc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/icons/twitter_x.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/mc14/logobannerhome_e.p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/mc14/mc14-docsicon.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/mc14/mc14-news.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.wto.org/images/img_index/fishacceptanc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
19 images 8.1 MB
0 oversized -0 KB
19 legacy format
15 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

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

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

B
JS Bundles
50 scripts, 133 KB unused
REVIEW
50 scripts, 133 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-4C48...: 66 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.wto.org/library/authentication/jquery-...: 22 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.wto.org/library/authentication/jquery-...: 22 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.wto.org/library/wtomenus/jquery.min.js: 22 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 133 KB
133 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-4C48KGVJMD156 KB66 KB (42%)✓3rd
https://www.wto.org/library/authentication/jquery-1.11.2.min.js30 KB22 KB (75%)✓3rd
https://www.wto.org/library/authentication/jquery-1.11.2.min.js30 KB22 KB (75%)✓3rd
https://www.wto.org/library/wtomenus/jquery.min.js30 KB22 KB (75%)✓3rd
https://www.wto.org/library/imrdlib.js1 KB—✓3rd
https://www.wto.org/library/wtomenus/jkmegamenu.js2 KB—✓3rd
https://www.wto.org/library/wtomenus/common_data_e.js3 KB—✓3rd
https://www.wto.org/library/news/news_vars_e.js25 KB—✗3rd
https://www.wto.org/library/news/current_news_e.js3 KB—✓3rd
https://www.wto.org/library/news/index_news_code_e.js3 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

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
5 fonts (113 KB)
PASS
5 fonts (113 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

113 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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 8.4 s LCP 12.5 shttps://www.wto.org/library/styles/fonts/museo/3308EE_1_0.woff23308EE_1_0.woff2 https://www.wto.org/library/styles/fonts/museo/3308EE_1_0.woff2 — 25.1 KiB — 393 ms — font-display: swaphttps://www.wto.org/library/_icons/WTO.woffWTO.woff https://www.wto.org/library/_icons/WTO.woff — 11.1 KiB — 402 ms — font-display: swaphttps://www.wto.org/library/styles/fonts/museo/3308EE_0_0.woff23308EE_0_0.woff2 https://www.wto.org/library/styles/fonts/museo/3308EE_0_0.woff2 — 25.8 KiB — 396 ms — font-display: swaphttps://www.wto.org/library/styles/fonts/museo/3308EE_2_0.woff23308EE_2_0.woff2 https://www.wto.org/library/styles/fonts/museo/3308EE_2_0.woff2 — 25.6 KiB — 390 ms — font-display: swaphttps://www.wto.org/library/styles/fonts/museo/3308EE_4_0.woff23308EE_4_0.woff2 https://www.wto.org/library/styles/fonts/museo/3308EE_4_0.woff2 — 25.7 KiB — 403 ms — font-display: swap
3308EE_1_0.woff2 woff2 swap
Size 25 KB
Load time 393 ms
Start 12.1 s
Risk FOUT — text flashes from fallback to web font
WTO.woff woff swap
Size 11 KB
Load time 402 ms
Start 12.1 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
3308EE_0_0.woff2 woff2 swap
Size 26 KB
Load time 396 ms
Start 12.1 s
Risk FOUT — text flashes from fallback to web font
3308EE_2_0.woff2 woff2 swap
Size 26 KB
Load time 390 ms
Start 12.1 s
Risk FOUT — text flashes from fallback to web font
3308EE_4_0.woff2 woff2 swap
Size 26 KB
Load time 403 ms
Start 12.1 s
Risk FOUT — text flashes from fallback to web font
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 ~3 KB and ~6 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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
94 requests over 21382ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s FCP 8.4 s LCP 12.5 shttps://wto.org// https://wto.org/ — 302 — 724 B — 863 ms — h2https://www.wto.org/www.wto.org/ https://www.wto.org/ — 200 — 10.6 KiB — 407 ms — h2https://www.wto.org/library/imrdlib.jswww.wto.org/library/imrdlib.js https://www.wto.org/library/imrdlib.js — 200 — 1.2 KiB — 401 ms — h2https://www.wto.org/library/wtomenus/jquery.min.jswww.wto.org/library/wtomenus/jquery... https://www.wto.org/library/wtomenus/jquery.min.js — 200 — 29.9 KiB — 395 ms — h2https://www.wto.org/library/wtomenus/jkmegamenu.jswww.wto.org/library/wtomenus/jkmega... https://www.wto.org/library/wtomenus/jkmegamenu.js — 200 — 2.4 KiB — 404 ms — h2https://www.wto.org/library/wtomenus/common_data_e.jswww.wto.org/library/wtomenus/common... https://www.wto.org/library/wtomenus/common_data_e.js — 200 — 2.7 KiB — 398 ms — h2https://www.wto.org/library/news/news_vars_e.jswww.wto.org/library/news/news_vars_... https://www.wto.org/library/news/news_vars_e.js — 200 — 24.9 KiB — 761 ms — h2https://www.wto.org/library/news/current_news_e.jswww.wto.org/library/news/current_ne... https://www.wto.org/library/news/current_news_e.js — 200 — 3.1 KiB — 1.5 s — h2https://www.wto.org/library/news/index_news_code_e.jswww.wto.org/library/news/index_news... https://www.wto.org/library/news/index_news_code_e.js — 200 — 2.5 KiB — 1.5 s — h2https://www.wto.org/library/photo_gallery/slideshow_data.jswww.wto.org/library/photo_gallery/s... https://www.wto.org/library/photo_gallery/slideshow_data.js — 200 — 101.0 KiB — 2.6 s — h2https://www.wto.org/library/photo_gallery/photo_gallery_code.jswww.wto.org/library/photo_gallery/p... https://www.wto.org/library/photo_gallery/photo_gallery_code.js — 200 — 12.5 KiB — 1.5 s — h2https://www.wto.org/library/events/interactive_cal_code.jswww.wto.org/library/events/interact... https://www.wto.org/library/events/interactive_cal_code.js — 200 — 18.1 KiB — 1.5 s — h2https://www.wto.org/library/bodies/bodies_public.jswww.wto.org/library/bodies/bodies_p... https://www.wto.org/library/bodies/bodies_public.js — 200 — 7.7 KiB — 1.5 s — h2https://www.wto.org/library/styles/wto.csswww.wto.org/library/styles/wto.css https://www.wto.org/library/styles/wto.css — 200 — 19.6 KiB — 401 ms — h2https://www.wto.org/library/events/responsive/lightbox/lightgallery.csswww.wto.org/library/events/responsi... https://www.wto.org/library/events/responsive/lightbox/lightgallery.css — 200 — 4.1 KiB — 403 ms — h2https://www.wto.org/library/events/responsive/lightbox/lightgallery_style.csswww.wto.org/library/events/responsi... https://www.wto.org/library/events/responsive/lightbox/lightgallery_style.css — 200 — 682 B — 398 ms — h2https://www.wto.org/library/authentication/jquery-1.11.2.min.jswww.wto.org/library/authentication/... https://www.wto.org/library/authentication/jquery-1.11.2.min.js — 200 — 30.3 KiB — 391 ms — h2https://www.wto.org/library/authentication/json2.jswww.wto.org/library/authentication/... https://www.wto.org/library/authentication/json2.js — 200 — 5.4 KiB — 396 ms — h2https://www.wto.org/library/authentication/jquery-cookie.jswww.wto.org/library/authentication/... https://www.wto.org/library/authentication/jquery-cookie.js — 200 — 1.5 KiB — 397 ms — h2https://www.wto.org/library/authentication/JavaScriptPrincipal.jswww.wto.org/library/authentication/... https://www.wto.org/library/authentication/JavaScriptPrincipal.js — 200 — 2.7 KiB — 394 ms — h2https://www.wto.org/library/wtomenus/common_logic_e.jswww.wto.org/library/wtomenus/common... https://www.wto.org/library/wtomenus/common_logic_e.js — 200 — 4.0 KiB — 392 ms — h2https://www.wto.org/library/member_data_functions.jswww.wto.org/library/member_data_fun... https://www.wto.org/library/member_data_functions.js — 200 — 1.8 KiB — 389 ms — h2https://www.wto.org/library/authentication/logindol.htmwww.wto.org/library/authentication/... https://www.wto.org/library/authentication/logindol.htm — 200 — 1.1 KiB — 399 ms — h2https://www.wto.org/WindowsProviders/SecurityProvider.ashx?hash=1776804063706&{}www.wto.org/WindowsProviders/Securi... https://www.wto.org/WindowsProviders/SecurityProvider.ashx?hash=1776804063706&{} — 403 — 760 B — 387 ms — h2https://www.wto.org/FormsProviders/SecurityProvider.ashx?hash=1776804064098&{}www.wto.org/FormsProviders/Security... https://www.wto.org/FormsProviders/SecurityProvider.ashx?hash=1776804064098&{} — 200 — 595 B — 388 ms — h2https://www.googletagmanager.com/gtag/js?id=G-4C48KGVJMDwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-4C48KGVJMD — 200 — 155.9 KiB — 253 ms — h2https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516static.cloudflareinsights.com/beaco... 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https://www.wto.org/images/img_index/photos/Fish_Fund_updated_20260415125754_md.png — 200 — 49.4 KiB — 399 ms — h2https://www.wto.org/images/img_index/photos/semiconductors_md.jpgwww.wto.org/images/img_index/photos... https://www.wto.org/images/img_index/photos/semiconductors_md.jpg — 200 — 242.9 KiB — 1.5 s — h2https://www.wto.org/images/img_index/photos/Robert-Staiger_e_lg_20260309112950.jpgwww.wto.org/images/img_index/photos... https://www.wto.org/images/img_index/photos/Robert-Staiger_e_lg_20260309112950.jpg — 200 — 15.2 KiB — 394 ms — h2https://www.wto.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?www.wto.org/cdn-cgi/challenge-platf... https://www.wto.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js? — 200 — 0 B — 0 ms — h2https://www.wto.org/cdn-cgi/challenge-platform/h/b/jsd/oneshot/0b8fb825cb67/0.7989566937318935:1776802399:zTKHR5rhRQnoOcPGrKEmCIpeWlJ-83Z6Gei8kRIaJDY/9eff350e5c83a42cwww.wto.org/cdn-cgi/challenge-platf... https://www.wto.org/cdn-cgi/challenge-platform/h/b/jsd/oneshot/0b8fb825cb67/0.7989566937318935:1776802399:zTKHR5rhRQnoOcPGrKEmCIpeWlJ-83Z6Gei8kRIaJDY/9eff350e5c83a42c — 200 — 1016 B — 13 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 13252ms · 290KB · €144/mo
www.wto.org
Other
Costly
Execution 6022ms
Transfer 18 KB
Monthly Cost €65/mo
www.wto.org
Other
Costly
Execution 5923ms
Transfer 11 KB
Monthly Cost €64/mo
www.wto.org
Other
Costly
Execution 786ms
Transfer 4 KB
Monthly Cost €9/mo
Unattributable
Other
Costly
Execution 246ms
Transfer 0 KB
Monthly Cost €3/mo
www.wto.org
Other
Optional
Execution 139ms
Transfer 0 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 82ms
Transfer 156 KB
Unused 42%
Monthly Cost €1/mo
www.wto.org
Other
Optional
Execution 55ms
Transfer 101 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.wto.org adds 6022ms and costs ~€65/month
  • www.wto.org adds 5923ms and costs ~€64/month
  • www.wto.org adds 786ms and costs ~€9/month
  • Unattributable adds 246ms and costs ~€3/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.wto.org takes 6022ms 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.wto.org takes 5923ms 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.wto.org takes 786ms 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 246ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

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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