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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
5
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
56
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
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.
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.

4.97 s

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

6.66 s

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

42 ms

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

0.002

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

5.94 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.

6.90 s

Page Load Progression

675 ms
1.4 s
2.0 s
2.7 s
3.4 s
4.0 s
4.7 s
5.4 s
Checks
15
5 PASS 3 REVIEW 5 FIX
D
Page Weight Budget
Action
2.3 MB transferred, 104 requests
FIX
2.3 MB transferred, 104 requests
Info::
Page weighs 5.6 MB (2.3 MB transferred)
Warning::
JavaScript is 1.5 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.5 MB
Info::
Fonts are 227 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 227 KB
Warning::
104 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.48 g CO2 per page load
2.3 MB / 2.4 MB budget
2.3 MB transferred
104 requests
0.48 g CO2 per page load
JavaScript 1.5 MiB 65%
Images 433.2 KiB 19%
Fonts 226.9 KiB 10%
CSS 95.5 KiB 4%
HTML 41.3 KiB 2%
Other 16.5 KiB 1%
Other 5.7 KiB 0%
Other 566 B 0%
Other 546 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
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 (2.3 MiB of 2.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
32 scripts, 751 KB unused
FIX
32 scripts, 751 KB unused
Warning::
https://www.itu.int/js/jquery-ui-1.8.16.min.js: 179 KB unused (91%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.itu.int/_layouts/15/core.js?rev=ZDqG1y...: 118 KB unused (91%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-M2L...: 65 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-T690...: 65 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-121...: 64 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 751 KB
751 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.itu.int/js/jquery-ui-1.8.16.min.js198 KB179 KB (91%)✓3rd
https://www.itu.int/_layouts/15/core.js?rev=ZDqG1yirPiaXxf0KNWhHeQ%3D%3DTAG0130 KB118 KB (91%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-M2LC5X5143 KB65 KB (46%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-T69008QZXS&cx=c&gtm=4e64h1161 KB65 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-121074739-1116 KB64 KB (55%)✓3rd
https://www.itu.int/_layouts/15/init.js?rev=TzY%2Fm%2FOoPnHW9OQ41OjrYQ%3D%3DTAG083 KB57 KB (69%)✓3rd
https://www.google.com/cse/static/element/dc329f57de078f5d/cse_element__en.js?usqp=CAM%3D103 KB52 KB (51%)✓3rd
https://www.itu.int/js/jquery-1.6.4.min.js91 KB47 KB (52%)✓3rd
https://www.itu.int/js/itu-functions.js69 KB32 KB (46%)✗3rd
https://cse.google.com/adsense/search/async-ads.js44 KB32 KB (73%)✓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

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

F
Page Weight Inventory
Action
104 resources · 2.3 MB · 751 KB savings available
FIX
104 resources · 2.3 MB · 751 KB savings available
Warning::
Page weight 1.3 MB over 1MB target
Got: 2.3 MB Expected: ≤ 1 MB
Info::
~751 KB of savings available
Warning::
103 third-party resources (100% of weight)
104 resources · 2.3 MiB · 103 third-party 1.3 MiB over 1MB target
JavaScript 65% · 1.5 MiB
Image 19% · 435.4 KiB
Font 10% · 226.9 KiB
CSS 4% · 95.5 KiB
Document 2% · 44.7 KiB
Other 1% · 17.7 KiB

~751.1 KiB of savings available

Remove unused JavaScript: 751.1 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
44 images, 0 KB saveable
REVIEW
44 images, 0 KB saveable
Warning::
https://www.itu.int/en/PublishingImages/slider/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/homepage-n... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/homepage-n... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/slider/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/homepage-i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/homepage-n... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/slider/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/homepage-4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/homepage-4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/homepage-t... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/homepage-i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/homepage-4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/slider/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/slider/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.itu.int/en/PublishingImages/homepage-i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
44 images 433 KB
0 oversized -0 KB
43 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 Execution Cost
846ms total JS execution
REVIEW
846ms total JS execution
Info::
https://script.hotjar.com/modules.6a0f3932cb1341a3...: 223ms CPU time
Info::
https://www.itu.int/en/Pages/default.aspx: 192ms CPU time
Info::
Unattributable: 143ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-T690...: 104ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-M2L...: 75ms CPU time
Warning::
Third-party scripts: 846ms (100% of total)

Main Thread Breakdown

Script Evaluation 54% Other 18% Script Parsing & Compilation 12% Style & Layout 11% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js223ms196ms7ms3rd
https://www.itu.int/en/Pages/default.aspx192ms15ms5ms3rd
Unattributable143ms3ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-T69008QZXS&cx=c&gtm=4e64h1104ms86ms16ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-M2LC5X575ms59ms15ms3rd
https://www.itu.int/js/jquery-1.6.4.min.js58ms35ms3ms3rd
https://script.hotjar.com/survey-v2.8b9993fd273bc1f4ea37.js51ms37ms9ms3rd
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
4 fonts (227 KB)
PASS
4 fonts (227 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

227 KB total

Render-blocking

0

of 4

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 5.0 s LCP 6.7 shttps://www.itu.int/fonts/DroidSans-Bold-webfont.woffDroidSans-Bold-webfont.... https://www.itu.int/fonts/DroidSans-Bold-webfont.woff — 55.2 KiB — 367 ms — font-display: swaphttps://www.itu.int/fonts/DroidSerif-Regular-webfont.woffDroidSerif-Regular-webf... https://www.itu.int/fonts/DroidSerif-Regular-webfont.woff — 72.2 KiB — 481 ms — font-display: swaphttps://script.hotjar.com/Roboto-Medium.ef8bb0.woff2Roboto-Medium.ef8bb0.woff2 https://script.hotjar.com/Roboto-Medium.ef8bb0.woff2 — 49.8 KiB — 21 ms — font-display: swaphttps://script.hotjar.com/Roboto-Regular.422781.woff2Roboto-Regular.422781.w... https://script.hotjar.com/Roboto-Regular.422781.woff2 — 49.6 KiB — 18 ms — font-display: swap
DroidSans-Bold-webfont.... woff swap
Size 55 KB
Load time 367 ms
Start 4.2 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
DroidSerif-Regular-webf... woff swap
Size 72 KB
Load time 481 ms
Start 4.2 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Roboto-Medium.ef8bb0.woff2 woff2 swap
Size 50 KB
Load time 21 ms
Start 4.9 s
Risk FOUT — text flashes from fallback to web font
Roboto-Regular.422781.w... woff2 swap
Size 50 KB
Load time 18 ms
Start 4.9 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 ~38 KB and ~76 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
Network Waterfall
104 requests over 8602ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 5.0 s LCP 6.7 shttps://itu.int// https://itu.int/ — 301 — 104 B — 609 ms — http/1.1https://www.itu.int/www.itu.int/ https://www.itu.int/ — 302 — 1.3 KiB — 666 ms — http/1.1https://www.itu.int/Pages/VariationRoot.aspxwww.itu.int/Pages/VariationRoot.asp... https://www.itu.int/Pages/VariationRoot.aspx — 302 — 1.1 KiB — 341 ms — http/1.1https://www.itu.int/enwww.itu.int/en https://www.itu.int/en — 302 — 1.0 KiB — 249 ms — http/1.1https://www.itu.int/en/Pages/default.aspxwww.itu.int/en/Pages/default.aspx https://www.itu.int/en/Pages/default.aspx — 200 — 34.5 KiB — 904 ms — http/1.1https://www.itu.int/_layouts/15/1033/styles/Themable/corev15.css?rev=UP2nlZLed9gOy%2BMP38oz0A%3D%3DTAG0www.itu.int/_layouts/15/1033/styles... https://www.itu.int/_layouts/15/1033/styles/Themable/corev15.css?rev=UP2nlZLed9gOy%2BMP38oz0A%3D%3DTAG0 — 200 — 48.6 KiB — 234 ms — http/1.1https://www.itu.int/_layouts/15/1033/initstrings.js?rev=GAkoVg6Sl%2Bo2hXf%2BWL1ISg%3D%3DTAG0www.itu.int/_layouts/15/1033/initst... https://www.itu.int/_layouts/15/1033/initstrings.js?rev=GAkoVg6Sl%2Bo2hXf%2BWL1ISg%3D%3DTAG0 — 200 — 7.2 KiB — 681 ms — http/1.1https://www.itu.int/_layouts/15/init.js?rev=TzY%2Fm%2FOoPnHW9OQ41OjrYQ%3D%3DTAG0www.itu.int/_layouts/15/init.js?rev... https://www.itu.int/_layouts/15/init.js?rev=TzY%2Fm%2FOoPnHW9OQ41OjrYQ%3D%3DTAG0 — 200 — 82.6 KiB — 1.1 s — http/1.1https://www.itu.int/_layouts/15/theming.js?rev=SuLUbbwTXcxFWOWLFUsOkw%3D%3DTAG0www.itu.int/_layouts/15/theming.js?... https://www.itu.int/_layouts/15/theming.js?rev=SuLUbbwTXcxFWOWLFUsOkw%3D%3DTAG0 — 200 — 12.8 KiB — 682 ms — http/1.1https://www.itu.int/ScriptResource.axd?d=u0dJMJBkSP4O90WEXjB8tUsWcB4BkV1jcweKd0FQdWO1x_N4-b754DaUl0PyjIvH9dPv4FFVPF2dJluTb89h54Dfa2pwZptViRIaJIVjDLbUrUcJ88KLnUdteAM2jIKg9-wVf3m1CQ7uI6cPbtQUJKv8zoRZ5TxEwzNQbI19jOz70D-BC-K6cgFKPpAD94Z70&t=32e5dfcawww.itu.int/ScriptResource.axd?d=u0... https://www.itu.int/ScriptResource.axd?d=u0dJMJBkSP4O90WEXjB8tUsWcB4BkV1jcweKd0FQdWO1x_N4-b754DaUl0PyjIvH9dPv4FFVPF2dJluTb89h54Dfa2pwZptViRIaJIVjDLbUrUcJ88KLnUdteAM2jIKg9-wVf3m1CQ7uI6cPbtQUJKv8zoRZ5TxEwzNQbI19jOz70D-BC-K6cgFKPpAD94Z70&t=32e5dfca — 200 — 25.6 KiB — 708 ms — http/1.1https://www.itu.int/_layouts/15/blank.js?rev=whhv86DINHGWQe4GPtKl0A%3D%3DTAG0www.itu.int/_layouts/15/blank.js?re... https://www.itu.int/_layouts/15/blank.js?rev=whhv86DINHGWQe4GPtKl0A%3D%3DTAG0 — 200 — 1.0 KiB — 910 ms — 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h2https://ep1.adtrafficquality.google/pagead/sodar?id=sodar2&v=254&t=2&li=afs_1234567890&jk=hYDF8tMEQKGdCe4fdxj1wg%3D%3D&bg=!TU6lTizNAAY2C5OeFgs7AEcBe5WfOEYNv3Q6z33NC1tzU_bDZv0tgUKtZgJm4q_iehx8vsYDxlX5hWbQunuIxDPrtOnwe7z5ZNDZIQ_f-38XE_Ge63zFLQIAAABZUgAAAAZoAQd-ABtEGRzc91fqPlc4pQVxBlBxfIXJxArf4ek_fVIKAGodgUi3FLUogTu9Dt2K6Rjm2OAWB84osOCSaqfaFTUfWMoWGfyk25K22CpkmuChJIzTEnaz-mN1s_vS1m9790SUq2Z-xN-uW_W06lJmLhR2QecICNM1wM1ay0wFW1DdwMi1z7NKTO7h94ramQIIk3PSGzBp3Grbd8RTvcYpd0aN-X8AofRYqiANj7fUvTXbNlWvYKqiPHGMv9PBIQg-4n9qq5xMDAPzsAi6ft3hl-9KtbVuZjUCvhO7aPnia4lGauv10RvpSh0eOuxKNrGekXnb8Qhcyf7unPeSdDjk9Ibwak8iLXdSvPVYtqHCl1LoK8h9oZSjZpDpLeBGmJuz6n1TeCijAxEvuN6M-wtFV-d4Mz3l4nWrEoUGJXBCQhsBkxYlHyw7tMNXcHoz7WInC8_ZVJBeLQjlu8Ks9oihg8Q7I5LrpaIYCGMh5OJfJAtV8qiT19BuWaCsu3H1OlX8xfBoMjpG-zI_PTHOxWtGgJxaIOfwCtBgVWImBIgccBVTMo-G38WQ8EGQhmXY3KyKcibzgmc5misY8QDZ3U5YyPZKUPYZdk0YXkquHZVJMrMTxfgFCVxa5_skxLV_4s3KnSFR20YjqjeCuJ6hzIBDWGy7y6I-Y6LvLyG6UUp5h6h5Dsuyu239GO0yNW3rwSxMFiSwTEeImd0ygT5pwYS8ZzKFK6CdTuPxZgPyVC9lJPCB_UEJGR91nUBw8dDORwEsIHfzwEssWUv1I3x0dcJp1Eb0KsVugJrEdS29qlkl1573spNLHak-DKst1wuhU35cftcErZJj3v-fhn7GsMcr3HkB2GPgD2YoDj5CGGO6_8x5gFLFG2-QBwep1.adtrafficquality.google/pagead/... https://ep1.adtrafficquality.google/pagead/sodar?id=sodar2&v=254&t=2&li=afs_1234567890&jk=hYDF8tMEQKGdCe4fdxj1wg%3D%3D&bg=!TU6lTizNAAY2C5OeFgs7AEcBe5WfOEYNv3Q6z33NC1tzU_bDZv0tgUKtZgJm4q_iehx8vsYDxlX5hWbQunuIxDPrtOnwe7z5ZNDZIQ_f-38XE_Ge63zFLQIAAABZUgAAAAZoAQd-ABtEGRzc91fqPlc4pQVxBlBxfIXJxArf4ek_fVIKAGodgUi3FLUogTu9Dt2K6Rjm2OAWB84osOCSaqfaFTUfWMoWGfyk25K22CpkmuChJIzTEnaz-mN1s_vS1m9790SUq2Z-xN-uW_W06lJmLhR2QecICNM1wM1ay0wFW1DdwMi1z7NKTO7h94ramQIIk3PSGzBp3Grbd8RTvcYpd0aN-X8AofRYqiANj7fUvTXbNlWvYKqiPHGMv9PBIQg-4n9qq5xMDAPzsAi6ft3hl-9KtbVuZjUCvhO7aPnia4lGauv10RvpSh0eOuxKNrGekXnb8Qhcyf7unPeSdDjk9Ibwak8iLXdSvPVYtqHCl1LoK8h9oZSjZpDpLeBGmJuz6n1TeCijAxEvuN6M-wtFV-d4Mz3l4nWrEoUGJXBCQhsBkxYlHyw7tMNXcHoz7WInC8_ZVJBeLQjlu8Ks9oihg8Q7I5LrpaIYCGMh5OJfJAtV8qiT19BuWaCsu3H1OlX8xfBoMjpG-zI_PTHOxWtGgJxaIOfwCtBgVWImBIgccBVTMo-G38WQ8EGQhmXY3KyKcibzgmc5misY8QDZ3U5YyPZKUPYZdk0YXkquHZVJMrMTxfgFCVxa5_skxLV_4s3KnSFR20YjqjeCuJ6hzIBDWGy7y6I-Y6LvLyG6UUp5h6h5Dsuyu239GO0yNW3rwSxMFiSwTEeImd0ygT5pwYS8ZzKFK6CdTuPxZgPyVC9lJPCB_UEJGR91nUBw8dDORwEsIHfzwEssWUv1I3x0dcJp1Eb0KsVugJrEdS29qlkl1573spNLHak-DKst1wuhU35cftcErZJj3v-fhn7GsMcr3HkB2GPgD2YoDj5CGGO6_8x5gFLFG2-QBw — 204 — 17 B — 117 ms — h3
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 846ms · 549KB · $11/mo
Hotjar
Session Replay
Costly
Execution 223ms
Transfer 57 KB
Unused 38%
Monthly Cost $3/mo
www.itu.int
Other
Optional
Execution 192ms
Transfer 35 KB
Monthly Cost $3/mo
Unattributable
Other
Optional
Execution 143ms
Transfer 0 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 104ms
Transfer 161 KB
Unused 40%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 75ms
Transfer 143 KB
Unused 46%
Monthly Cost $1/mo
www.itu.int
Other
Optional
Execution 58ms
Transfer 91 KB
Unused 52%
Monthly Cost $1/mo
Hotjar
Session Replay
Optional
Execution 51ms
Transfer 63 KB
Unused 33%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Hotjar adds 223ms 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

Hotjar takes 223ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

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

Source: web.dev

52% of www.itu.int'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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