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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
7
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
78
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
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.

16.24 s

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

59.25 s

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

16.80 s

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

0.384

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

39.77 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.

65.24 s

Page Load Progression

2.4 s
4.7 s
7.1 s
9.5 s
11.8 s
14.2 s
16.6 s
19.0 s
Checks
17
8 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
9.7 MB transferred, 94 requests
FIX
9.7 MB transferred, 94 requests
Critical::
Page weighs 16.3 MB (9.7 MB transferred)
Warning::
Images are 8.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 8.3 MB
Warning::
JavaScript is 946 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 946 KB
Info::
94 HTTP requests
Info::
Estimated 2.0 g CO2 per page load
9.7 MB / 2.4 MB budget
9.7 MB transferred
94 requests
2.0 g CO2 per page load
Images 8.3 MiB 86%
JavaScript 946.0 KiB 10%
Other 267.6 KiB 3%
Fonts 113.4 KiB 1%
CSS 93.3 KiB 1%
HTML 11.8 KiB 0%
Other 1.0 KiB 0%
Other 1004 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

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 (9.7 MiB of 9.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
52488ms total JS execution
FIX
52488ms total JS execution
Warning::
https://www.wto.org/: 24238ms CPU time
Warning::
https://www.wto.org/library/events/interactive_cal...: 22467ms CPU time
Warning::
https://www.wto.org/library/wtomenus/common_logic_...: 3205ms CPU time
Warning::
Unattributable: 905ms CPU time
Warning::
https://www.wto.org/cdn-cgi/challenge-platform/scr...: 580ms CPU time
Warning::
Third-party scripts: 52488ms (100% of total)

Main Thread Breakdown

Script Evaluation 95%
ScriptTotalScriptingParse/CompileParty
https://www.wto.org/24238ms23287ms8ms3rd
https://www.wto.org/library/events/interactive_cal_code.js22467ms22440ms23ms3rd
https://www.wto.org/library/wtomenus/common_logic_e.js3205ms3200ms3ms3rd
Unattributable905ms4ms0ms3rd
https://www.wto.org/cdn-cgi/challenge-platform/scripts/jsd/main.js580ms525ms11ms3rd
https://www.googletagmanager.com/gtag/js?id=G-4C48KGVJMD364ms272ms61ms3rd
https://www.wto.org/library/photo_gallery/slideshow_data.js213ms15ms197ms3rd
https://www.wto.org/library/flashvideo/flash_video_e.js180ms16ms164ms3rd
https://www.wto.org/library/wtomenus/loader_wide_2011.js126ms31ms8ms3rd
https://www.wto.org/library/authentication/jquery-1.11.2.min.js108ms81ms22ms3rd

Showing top 10 of 12 scripts

D
Page Weight Inventory
Action
94 resources · 9.7 MB · 133 KB savings available
FIX
94 resources · 9.7 MB · 133 KB savings available
Warning::
Page weight 8.7 MB over 1MB target
Got: 9.7 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 · 9.7 MiB · 93 third-party 8.7 MiB over 1MB target
Image 86% · 8.3 MiB
JavaScript 10% · 946.0 KiB
Other 3% · 268.3 KiB
Font 1% · 113.4 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/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/media.png 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/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/flickr.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-docsicon.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/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/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/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/photos/TRIPS_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
19 images 8.3 MB
0 oversized -0 KB
19 legacy format
11 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

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 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s 46.0 s 48.0 s 50.0 s 52.0 s 54.0 s 56.0 s 58.0 s 60.0 s 62.0 s FCP 16.2 s LCP 59.2 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 — 25.3 KiB — 387 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 — 394 ms — font-display: swaphttps://www.wto.org/library/_icons/WTO.woffWTO.woff https://www.wto.org/library/_icons/WTO.woff — 11.1 KiB — 388 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 — 25.5 KiB — 398 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 — 390 ms — font-display: swap
3308EE_1_0.woff2 woff2 swap
Size 25 KB
Load time 387 ms
Start 11.7 s
Risk FOUT — text flashes from fallback to web font
3308EE_0_0.woff2 woff2 swap
Size 26 KB
Load time 394 ms
Start 11.7 s
Risk FOUT — text flashes from fallback to web font
WTO.woff woff swap
Size 11 KB
Load time 388 ms
Start 11.7 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
3308EE_2_0.woff2 woff2 swap
Size 26 KB
Load time 398 ms
Start 11.7 s
Risk FOUT — text flashes from fallback to web font
3308EE_4_0.woff2 woff2 swap
Size 26 KB
Load time 390 ms
Start 11.7 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+
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
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 20030ms
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 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s 46.0 s 48.0 s 50.0 s 52.0 s 54.0 s 56.0 s 58.0 s 60.0 s 62.0 s FCP 16.2 s LCP 59.2 shttps://wto.org// https://wto.org/ — 302 — 636 B — 400 ms — h2https://www.wto.org/www.wto.org/ https://www.wto.org/ — 200 — 10.7 KiB — 396 ms — h2https://www.wto.org/library/imrdlib.jswww.wto.org/library/imrdlib.js https://www.wto.org/library/imrdlib.js — 200 — 1.2 KiB — 392 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 — 1.5 s — 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 — 393 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 — 1.6 s — 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 — 403 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 — 3.3 KiB — 388 ms — 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 — 101.1 KiB — 2.2 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 — 12.3 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 — 7.9 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 — 400 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 — 392 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/images/mc14/logobannerhome_e.pngwww.wto.org/images/mc14/logobannerh... https://www.wto.org/images/mc14/logobannerhome_e.png — 200 — 191.4 KiB — 1.5 s — h2https://www.wto.org/images/mc14/mc14-calendaricon.pngwww.wto.org/images/mc14/mc14-calend... https://www.wto.org/images/mc14/mc14-calendaricon.png — 200 — 31.9 KiB — 386 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 — 29.9 KiB — 390 ms — h2https://www.wto.org/library/authentication/json2.jswww.wto.org/library/authentication/... https://www.wto.org/library/authentication/json2.js — 200 — 5.9 KiB — 384 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 — 387 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 — 385 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 — 4.1 KiB — 379 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 — 1.7 KiB — 394 ms — h2https://www.wto.org/images/mc14/mc14-docsicon.pngwww.wto.org/images/mc14/mc14-docsic... https://www.wto.org/images/mc14/mc14-docsicon.png — 200 — 26.4 KiB — 386 ms — h2https://www.wto.org/images/mc14/mc14-logisticsicon.pngwww.wto.org/images/mc14/mc14-logist... https://www.wto.org/images/mc14/mc14-logisticsicon.png — 200 — 76.2 KiB — 767 ms — h2https://www.wto.org/images/mc14/mc14-news.pngwww.wto.org/images/mc14/mc14-news.p... https://www.wto.org/images/mc14/mc14-news.png — 200 — 66.3 KiB — 772 ms — h2https://www.wto.org/library/wtomenus/loader_wide_2011.jswww.wto.org/library/wtomenus/loader... https://www.wto.org/library/wtomenus/loader_wide_2011.js — 200 — 13.6 KiB — 407 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 — 390 ms — h2https://www.wto.org/WindowsProviders/SecurityProvider.ashx?hash=1776804001080&{}www.wto.org/WindowsProviders/Securi... https://www.wto.org/WindowsProviders/SecurityProvider.ashx?hash=1776804001080&{} — 403 — 752 B — 394 ms — h2
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 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s 46.0 s 48.0 s 50.0 s 52.0 s 54.0 s 56.0 s 58.0 s 60.0 s 62.0 s FCP 16.2 s LCP 59.2 shttps://wto.org// https://wto.org/ — 302 — 636 B — 400 ms — h2https://www.wto.org/www.wto.org/ https://www.wto.org/ — 200 — 10.7 KiB — 396 ms — h2https://www.wto.org/library/imrdlib.jswww.wto.org/library/imrdlib.js https://www.wto.org/library/imrdlib.js — 200 — 1.2 KiB — 392 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 — 1.5 s — 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 — 393 ms — h2https://www.wto.org/library/wtomenus/common_data_e.jswww.wto.org/library/wtomenus/common... 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Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 52488ms · 573KB · €570/mo
www.wto.org
Other
Costly
Execution 24238ms
Transfer 11 KB
Monthly Cost €263/mo
www.wto.org
Other
Costly
Execution 22467ms
Transfer 18 KB
Monthly Cost €244/mo
www.wto.org
Other
Costly
Execution 3205ms
Transfer 4 KB
Monthly Cost €35/mo
Unattributable
Other
Costly
Execution 905ms
Transfer 0 KB
Monthly Cost €10/mo
www.wto.org
Other
Costly
Execution 580ms
Transfer 0 KB
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 364ms
Transfer 156 KB
Unused 42%
Monthly Cost €4/mo
www.wto.org
Other
Costly
Execution 213ms
Transfer 101 KB
Monthly Cost €2/mo
www.wto.org
Other
Optional
Execution 180ms
Transfer 209 KB
Monthly Cost €2/mo
www.wto.org
Other
Optional
Execution 126ms
Transfer 14 KB
Monthly Cost €1/mo
www.wto.org
Other
Optional
Execution 108ms
Transfer 30 KB
Unused 75%
Monthly Cost €1/mo
static.cloudflareinsights.com
Other
Optional
Execution 53ms
Transfer 0 KB
Monthly Cost €1/mo
www.wto.org
Other
Optional
Execution 50ms
Transfer 30 KB
Unused 75%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.wto.org adds 24238ms and costs ~€263/month
  • www.wto.org adds 22467ms and costs ~€244/month
  • www.wto.org adds 3205ms and costs ~€35/month
  • Unattributable adds 905ms and costs ~€10/month
  • www.wto.org adds 580ms and costs ~€6/month
  • Google Tag Manager adds 364ms and costs ~€4/month
  • www.wto.org adds 213ms and costs ~€2/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 24238ms 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 22467ms 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 3205ms 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 905ms 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 580ms 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 364ms 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 213ms 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

75% of www.wto.org'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

75% of www.wto.org'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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