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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
3
REVIEW
3
PASS
9
INFO
2

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

Mobile Desktop
46
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.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
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.

5.68 s

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

23.73 s

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

456 ms

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

0.001

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

8.53 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.

24.08 s

Page Load Progression

450 ms
900 ms
1.3 s
1.8 s
2.2 s
2.7 s
3.1 s
3.6 s
Checks
17
9 PASS 3 REVIEW 3 FIX
F
Page Weight Budget
Action
7.9 MB transferred, 95 requests
FIX
7.9 MB transferred, 95 requests
Critical::
Page weighs 12.0 MB (7.9 MB transferred)
Warning::
Images are 6.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 6.6 MB
Warning::
JavaScript is 864 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 864 KB
Info::
95 HTTP requests
Info::
Estimated 1.6 g CO2 per page load
7.9 MB / 2.4 MB budget
7.9 MB transferred
95 requests
1.6 g CO2 per page load
Images 6.6 MiB 83%
JavaScript 863.7 KiB 11%
HTML 126.1 KiB 2%
CSS 120.0 KiB 1%
Fonts 113.1 KiB 1%
Other 104.1 KiB 1%
Other 736 B 0%
Other 647 B 0%
Other 491 B 0%
Other 471 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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
JS Execution Cost
Action
2853ms total JS execution
FIX
2853ms total JS execution
Warning::
Unattributable: 823ms CPU time
Warning::
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketc...: 459ms CPU time
Warning::
https://pubmatic.com/: 451ms CPU time
Warning::
https://cdnjs.cloudflare.com/ajax/libs/gsap/3.9.1/...: 420ms CPU time
Warning::
https://pubmatic.com/wp-content/themes/pubmatic/js...: 414ms CPU time
Warning::
Third-party scripts: 1896ms (66% of total)

Main Thread Breakdown

Script Evaluation 37% Other 33% Style & Layout 17% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
Unattributable823ms108ms0ms3rd
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js459ms336ms118ms3rd
https://pubmatic.com/451ms23ms4ms1st
https://cdnjs.cloudflare.com/ajax/libs/gsap/3.9.1/gsap.min.js?ver=1420ms119ms5ms3rd
https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.3.7.1.min.js?ver=3.7.1414ms234ms7ms1st
https://www.googletagmanager.com/gtm.js?id=GTM-TDPB8VC193ms162ms30ms3rd
https://pubmatic.com/wp-content/themes/pubmatic/js/scripts.js?ver=1811202591ms79ms11ms1st
D
JS Bundles
Action
23 scripts, 205 KB unused
FIX
23 scripts, 205 KB unused
Warning::
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketc...: 117 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TDP...: 63 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://pubmatic.com/wp-content/themes/pubmatic/js...: 25 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://pubmatic.com/wp-content/themes/pubmatic/js...: unminified — 5 KB could be saved
Info::
Total unused JavaScript: 205 KB
205 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js257 KB117 KB (46%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TDPB8VC132 KB63 KB (48%)✓3rd
https://pubmatic.com/wp-content/themes/pubmatic/js/scripts.js?ver=1811202532 KB25 KB (77%)✗1st
https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.waitforimages.js?ver=4.0.12 KB—✓1st
https://player.vimeo.com/api/player.js?ver=200520249 KB—✓3rd
https://cdnjs.cloudflare.com/ajax/libs/gsap/3.9.1/ScrollTrigger.min.js?ver=110 KB—✓3rd
https://pubmatic.com/wp-content/themes/pubmatic/js/bootstrap.min.js?ver=5.3.323 KB—✓1st
https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.alignHeight.js?ver=1.01 KB—✓1st
https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.matchHeight-min.js?ver=1.02 KB—✓1st
https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.waypoints.min.js?ver=4.0.13 KB—✓1st

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

C
Image Optimization
Action
38 images, 0 KB saveable
REVIEW
38 images, 0 KB saveable
Warning::
https://pubmatic.com/wp-content/uploads/2025/06/pr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://pubmatic.com/wp-content/themes/pubmatic/im... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://pubmatic.com/wp-content/themes/pubmatic/im... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
38 images 6.6 MB
0 oversized -0 KB
34 legacy format
3 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

C
Page Weight Inventory
Action
95 resources · 7.9 MB · 205 KB savings available
REVIEW
95 resources · 7.9 MB · 205 KB savings available
Warning::
Page weight 6.9 MB over 1MB target
Got: 7.9 MB Expected: ≤ 1 MB
Info::
~205 KB of savings available
Info::
29 third-party resources (20% of weight)
Info::
18 resources over 200KB
95 resources · 7.9 MiB · 29 third-party 6.9 MiB over 1MB target
Image 83% · 6.6 MiB
JavaScript 11% · 863.7 KiB
Document 2% · 126.1 KiB
CSS 1% · 120.0 KiB
Font 1% · 113.1 KiB
Other 1% · 105.7 KiB

~205.0 KiB of savings available

Remove unused JavaScript: 205.0 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
20% third-party, 0 ms blocking
PASS
20% third-party, 0 ms blocking
Info::
Third-party code accounts for 20% of page weight (1.5 MiB of 7.9 MiB)
Info::
Third-party blocking time is low (0 ms)
80%
20%
First-party Third-party
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
6 fonts (113 KB)
PASS
6 fonts (113 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

113 KB total

Render-blocking

0

of 6

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 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 FCP 5.7 s LCP 23.7 shttps://pubmatic.com/wp-content/themes/pubmatic/fonts/glyphicons-halflings-regular.woff2glyphicons-halflings-re... https://pubmatic.com/wp-content/themes/pubmatic/fonts/glyphicons-halflings-regular.woff2 — 18.0 KiB — 106 ms — font-display: swaphttps://pubmatic.com/wp-content/themes/pubmatic/fonts/tvnordef-blackcon-webfont.woff2tvnordef-blackcon-webfo... https://pubmatic.com/wp-content/themes/pubmatic/fonts/tvnordef-blackcon-webfont.woff2 — 21.2 KiB — 117 ms — font-display: swaphttps://pubmatic.com/wp-content/themes/pubmatic/fonts/tvnordef-regular-webfont.woff2tvnordef-regular-webfon... https://pubmatic.com/wp-content/themes/pubmatic/fonts/tvnordef-regular-webfont.woff2 — 22.5 KiB — 119 ms — font-display: swaphttps://pubmatic.com/wp-content/themes/pubmatic/fonts/tvnordef-black-webfont.woff2tvnordef-black-webfont.... https://pubmatic.com/wp-content/themes/pubmatic/fonts/tvnordef-black-webfont.woff2 — 23.3 KiB — 115 ms — font-display: swaphttps://pubmatic.com/wp-content/themes/pubmatic/fonts/tvnordef-bold.wofftvnordef-bold.woff https://pubmatic.com/wp-content/themes/pubmatic/fonts/tvnordef-bold.woff — 20.7 KiB — 117 ms — font-display: swaphttps://pubmatic.com/wp-content/themes/pubmatic/fonts/pubmatic-icons.ttf?efz5rhpubmatic-icons.ttf https://pubmatic.com/wp-content/themes/pubmatic/fonts/pubmatic-icons.ttf?efz5rh — 7.4 KiB — 96 ms — font-display: swap
glyphicons-halflings-re... woff2 swap
Size 18 KB
Load time 106 ms
Start 324 ms
Risk FOUT — text flashes from fallback to web font
tvnordef-blackcon-webfo... woff2 swap
Size 21 KB
Load time 117 ms
Start 324 ms
Risk FOUT — text flashes from fallback to web font
tvnordef-regular-webfon... woff2 swap
Size 23 KB
Load time 119 ms
Start 326 ms
Risk FOUT — text flashes from fallback to web font
tvnordef-black-webfont.... woff2 swap
Size 23 KB
Load time 115 ms
Start 326 ms
Risk FOUT — text flashes from fallback to web font
tvnordef-bold.woff woff swap
Size 21 KB
Load time 117 ms
Start 327 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
pubmatic-icons.ttf ttf swap
Size 7 KB
Load time 96 ms
Start 330 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 ~8 KB and ~16 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
5 hints, 0 missing preconnects
PASS
5 hints, 0 missing preconnects
Info::
Page uses 5 resource hint(s)

Current Resource Hints

preconnect
—
preload
2
dns-prefetch
3
prefetch
—

5 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
A
HTTP Caching
max-age=3600 (1 hour)
PASS
max-age=3600 (1 hour)
Info::
Cache-Control header is set
Got: max-age=3600, stale-while-revalidate=600, stale-if-error=86400
Info::
Effective TTL: 1 hour (max-age=3600)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=3600, stale-while-revalidate=600, stale-if-error=86400

DirectiveValueMeaning
max-age3600Cache for 1 hour
stale-while-revalidate600Serve stale for 10 minutes while fetching fresh
stale-if-error86400
Effective TTL: 3600 seconds
Network Waterfall
95 requests over 2208ms
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 FCP 5.7 s LCP 23.7 shttps://pubmatic.com// https://pubmatic.com/ — 200 — 114.8 KiB — 166 ms — h2https://pubmatic.com/wp-includes/css/dist/block-library/style.min.css?ver=6.6.5/wp-includes/css/dist/block-library... https://pubmatic.com/wp-includes/css/dist/block-library/style.min.css?ver=6.6.5 — 200 — 13.8 KiB — 51 ms — h2blob:https://pubmatic.com/2d1323ec-91f5-4d98-90da-f309cf73176epubmatic.com/2d1323ec-91f5-4d98-90d... blob:https://pubmatic.com/2d1323ec-91f5-4d98-90da-f309cf73176e — 200 — -1 B — 33 ms — blobhttps://pubmatic.com/manifest.json/manifest.json https://pubmatic.com/manifest.json — 200 — 647 B — 68 ms — h3https://pubmatic.com/wp-includes/css/dashicons.min.css?ver=6.6.5/wp-includes/css/dashicons.min.css?... https://pubmatic.com/wp-includes/css/dashicons.min.css?ver=6.6.5 — 200 — 34.8 KiB — 87 ms — h2https://pubmatic.com/wp-content/plugins/post-views-counter/css/frontend.min.css?ver=1.5.1/wp-content/plugins/post-views-coun... https://pubmatic.com/wp-content/plugins/post-views-counter/css/frontend.min.css?ver=1.5.1 — 200 — 914 B — 75 ms — h2https://pubmatic.com/wp-content/themes/pubmatic/css/bootstrap.min.css?ver=5.3.3/wp-content/themes/pubmatic/css/boo... https://pubmatic.com/wp-content/themes/pubmatic/css/bootstrap.min.css?ver=5.3.3 — 200 — 14.4 KiB — 88 ms — h2https://pubmatic.com/wp-content/themes/pubmatic/css/icons.css?ver=1.0/wp-content/themes/pubmatic/css/ico... https://pubmatic.com/wp-content/themes/pubmatic/css/icons.css?ver=1.0 — 200 — 1.3 KiB — 71 ms — h2https://pubmatic.com/wp-content/themes/pubmatic/css/slick.css?ver=1.8.1/wp-content/themes/pubmatic/css/sli... https://pubmatic.com/wp-content/themes/pubmatic/css/slick.css?ver=1.8.1 — 200 — 1.0 KiB — 76 ms — h2https://pubmatic.com/wp-content/themes/pubmatic/css/zoomify.min.css?ver=0.2.5/wp-content/themes/pubmatic/css/zoo... https://pubmatic.com/wp-content/themes/pubmatic/css/zoomify.min.css?ver=0.2.5 — 200 — 991 B — 72 ms — h2https://pubmatic.com/wp-content/themes/pubmatic/style.css?ver=1775751761/wp-content/themes/pubmatic/style.c... https://pubmatic.com/wp-content/themes/pubmatic/style.css?ver=1775751761 — 200 — 17.3 KiB — 89 ms — h2https://pubmatic.com/wp-content/themes/pubmatic/css/new_styles.css?ver=1775751564/wp-content/themes/pubmatic/css/new... https://pubmatic.com/wp-content/themes/pubmatic/css/new_styles.css?ver=1775751564 — 200 — 6.0 KiB — 76 ms — h2https://pubmatic.com/wp-content/themes/pubmatic/css/splide-core.min.css?ver=20052024/wp-content/themes/pubmatic/css/spl... https://pubmatic.com/wp-content/themes/pubmatic/css/splide-core.min.css?ver=20052024 — 200 — 1.2 KiB — 80 ms — h2https://pubmatic.com/wp-content/themes/pubmatic/css/pages/home.css?ver=20112025/wp-content/themes/pubmatic/css/pag... https://pubmatic.com/wp-content/themes/pubmatic/css/pages/home.css?ver=20112025 — 200 — 4.3 KiB — 77 ms — h2https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.3.7.1.min.js?ver=3.7.1/wp-content/themes/pubmatic/js/jque... https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.3.7.1.min.js?ver=3.7.1 — 200 — 29.5 KiB — 94 ms — h2https://pubmatic.com/wp-content/themes/pubmatic/js/slick.min.js?ver=1.8.1/wp-content/themes/pubmatic/js/slic... https://pubmatic.com/wp-content/themes/pubmatic/js/slick.min.js?ver=1.8.1 — 200 — 10.3 KiB — 89 ms — h2https://pubmatic.com/wp-content/themes/pubmatic/js/zoomify.min.js?ver=0.2.5/wp-content/themes/pubmatic/js/zoom... https://pubmatic.com/wp-content/themes/pubmatic/js/zoomify.min.js?ver=0.2.5 — 200 — 1.6 KiB — 78 ms — h2https://cdnjs.cloudflare.com/ajax/libs/gsap/3.9.1/gsap.min.js?ver=1cdnjs.cloudflare.com/ajax/libs/gsap... https://cdnjs.cloudflare.com/ajax/libs/gsap/3.9.1/gsap.min.js?ver=1 — 200 — 23.0 KiB — 80 ms — h3https://cdnjs.cloudflare.com/ajax/libs/gsap/3.9.1/ScrollTrigger.min.js?ver=1cdnjs.cloudflare.com/ajax/libs/gsap... https://cdnjs.cloudflare.com/ajax/libs/gsap/3.9.1/ScrollTrigger.min.js?ver=1 — 200 — 10.0 KiB — 82 ms — h3https://pubmatic.com/wp-content/themes/pubmatic/imgs/logo-black.svg/wp-content/themes/pubmatic/imgs/lo... https://pubmatic.com/wp-content/themes/pubmatic/imgs/logo-black.svg — 200 — 3.7 KiB — 94 ms — h2https://pubmatic.com/wp-content/uploads/2026/03/Butler-Till-Case-Study-Thumb.png/wp-content/uploads/2026/03/Butler-... https://pubmatic.com/wp-content/uploads/2026/03/Butler-Till-Case-Study-Thumb.png — 200 — 331.9 KiB — 263 ms — h3https://pubmatic.com/wp-content/themes/pubmatic/imgs/logo-white.svg/wp-content/themes/pubmatic/imgs/lo... https://pubmatic.com/wp-content/themes/pubmatic/imgs/logo-white.svg — 200 — 3.6 KiB — 35 ms — h3https://pubmatic.com/wp-content/uploads/2026/04/2025-solutions-carousel-images-publishers.jpg/wp-content/uploads/2026/04/2025-so... https://pubmatic.com/wp-content/uploads/2026/04/2025-solutions-carousel-images-publishers.jpg — 200 — 416.8 KiB — 335 ms — h3https://pubmatic.com/wp-content/uploads/2026/04/2025-solutions-carousel-images-buyers.jpg/wp-content/uploads/2026/04/2025-so... https://pubmatic.com/wp-content/uploads/2026/04/2025-solutions-carousel-images-buyers.jpg — 200 — 450.2 KiB — 337 ms — h3https://pubmatic.com/wp-content/uploads/2025/12/2025-solutions-carousel-images-commerce-1.jpg/wp-content/uploads/2025/12/2025-so... https://pubmatic.com/wp-content/uploads/2025/12/2025-solutions-carousel-images-commerce-1.jpg — 200 — 591.2 KiB — 333 ms — h3https://pubmatic.com/wp-content/themes/pubmatic/js/bootstrap.min.js?ver=5.3.3/wp-content/themes/pubmatic/js/boot... https://pubmatic.com/wp-content/themes/pubmatic/js/bootstrap.min.js?ver=5.3.3 — 200 — 22.6 KiB — 56 ms — h3https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.alignHeight.js?ver=1.0/wp-content/themes/pubmatic/js/jque... https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.alignHeight.js?ver=1.0 — 200 — 904 B — 51 ms — h3https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.matchHeight-min.js?ver=1.0/wp-content/themes/pubmatic/js/jque... https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.matchHeight-min.js?ver=1.0 — 200 — 1.6 KiB — 51 ms — h3https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.waypoints.min.js?ver=4.0.1/wp-content/themes/pubmatic/js/jque... https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.waypoints.min.js?ver=4.0.1 — 200 — 2.9 KiB — 57 ms — h3https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.waitforimages.js?ver=4.0.1/wp-content/themes/pubmatic/js/jque... https://pubmatic.com/wp-content/themes/pubmatic/js/jquery.waitforimages.js?ver=4.0.1 — 200 — 2.3 KiB — 52 ms — h3
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https://global.ketchcdn.com/web/v2/log?hasConsent=false&url=https%3A%2F%2Fpubmatic.com%2F&property=website_smart_tag&environment=production&jurisdiction=gdpr&tenant=pubmatic&dver=1756078075&event_type=once_identities&ids=eyJzd2Jfd2Vic2l0ZV9zbWFydF90YWciOiIxZDVkYmZiNy0wYTI4LTQ2MDItYTgyZi0xZjcwOTZkOWI4OTkifQ%3D%3D&region=ES — 204 — 349 B — 3 ms — h3https://global.ketchcdn.com/web/v3/consent/pubmatic/getglobal.ketchcdn.com/web/v3/consent/... https://global.ketchcdn.com/web/v3/consent/pubmatic/get — 200 — 0 B — 586 ms — h3https://f.vimeocdn.com/js_opt/modules/utils/vuid.min.jsf.vimeocdn.com/js_opt/modules/utils... https://f.vimeocdn.com/js_opt/modules/utils/vuid.min.js — 200 — 1.1 KiB — 2 ms — h2https://i.vimeocdn.com/video/2141890018-e5ee04d1c4f26fe0dd893e73575f5c556d26904c7fbf8af71e8fa2132b80ae06-d?mw=400&mh=225i.vimeocdn.com/video/2141890018-e5e... https://i.vimeocdn.com/video/2141890018-e5ee04d1c4f26fe0dd893e73575f5c556d26904c7fbf8af71e8fa2132b80ae06-d?mw=400&mh=225 — 200 — 5.4 KiB — 2 ms — h2https://arclight.vimeo.com/add/player-stats?beacon=1&session-id=c33229df3e5c72a37303613587681001fb9b43231776359641arclight.vimeo.com/add/player-stats... https://arclight.vimeo.com/add/player-stats?beacon=1&session-id=c33229df3e5c72a37303613587681001fb9b43231776359641 — 200 — 142 B — 145 ms — h2https://orion.bendingspoons.com/v3/identity/settingsorion.bendingspoons.com/v3/identity... https://orion.bendingspoons.com/v3/identity/settings — 200 — 0 B — 185 ms — h2https://orion.bendingspoons.com/v3/identity/settingsorion.bendingspoons.com/v3/identity... https://orion.bendingspoons.com/v3/identity/settings — 200 — 455 B — 139 ms — h2https://global.ketchcdn.com/web/v3/consent/pubmatic/getglobal.ketchcdn.com/web/v3/consent/... https://global.ketchcdn.com/web/v3/consent/pubmatic/get — 200 — 568 B — 211 ms — h3https://global.ketchcdn.com/web/v3/consent/pubmatic/updateglobal.ketchcdn.com/web/v3/consent/... https://global.ketchcdn.com/web/v3/consent/pubmatic/update — 200 — 0 B — 153 ms — h3https://global.ketchcdn.com/web/v3/consent/pubmatic/updateglobal.ketchcdn.com/web/v3/consent/... https://global.ketchcdn.com/web/v3/consent/pubmatic/update — 200 — 823 B — 264 ms — h3https://global.ketchcdn.com/gvl/eu/vendor-list.jsonglobal.ketchcdn.com/gvl/eu/vendor-l... https://global.ketchcdn.com/gvl/eu/vendor-list.json — 200 — 88.3 KiB — 211 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
66% of JavaScript execution is third-party
First-party Third-party 1896ms · 413KB · $25/mo
Unattributable
Other
Costly
Execution 823ms
Transfer 0 KB
Monthly Cost $11/mo
cdn.ketchjs.com
Other
Costly
Execution 459ms
Transfer 257 KB
Unused 46%
Monthly Cost $6/mo
cdnjs
CDN
Costly
Execution 420ms
Transfer 23 KB
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Optional
Execution 193ms
Transfer 132 KB
Unused 48%
Monthly Cost $3/mo

These scripts may cost more than they're worth

  • Unattributable adds 823ms and costs ~$11/month
  • cdn.ketchjs.com adds 459ms and costs ~$6/month
  • cdnjs adds 420ms and costs ~$6/month

66% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 823ms 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

cdn.ketchjs.com takes 459ms 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

cdnjs takes 420ms 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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