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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
95
GRADE
A
FIX
0
REVIEW
1
PASS
12
INFO
2

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

Mobile Desktop
100
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
87
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

286 ms

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

350 ms

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

0 ms

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

0.000

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

372 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

350 ms

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
15
12 PASS 1 REVIEW
C
Image Optimization
Action
29 images, 0 KB saveable
REVIEW
29 images, 0 KB saveable
Warning::
https://adblockplus.org/img/media/wsj.png?10758252... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://adblockplus.org/img/footer-facebook-glyphi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://adblockplus.org/img/hero-ui-illustration.s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://adblockplus.org/img/media/techcrunch.png?1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://adblockplus.org/img/media/business-insider... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://adblockplus.org/img/footer-vk-glyphicon.pn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://adblockplus.org/img/footer-twitter-glyphic... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://adblockplus.org/img/footer-youtube-glyphic... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://adblockplus.org/img/abb-browser-icon.svg?1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://adblockplus.org/img/media/mediapost.png?10... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://adblockplus.org/img/adblockplus-logo-color... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://adblockplus.org/img/android-video-illustra... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://adblockplus.org/img/footer-instagram-glyph... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://adblockplus.org/img/media/nyt.png?10758252... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
29 images 315 KB
0 oversized -0 KB
29 legacy format
14 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

A+
Page Weight Budget
395 KB transferred, 45 requests
PASS
395 KB transferred, 45 requests
Info::
Page weighs 835 KB (395 KB transferred)
Info::
45 HTTP requests
Info::
Estimated 0.08 g CO2 per page load
395 KB / 2.4 MB budget
395 KB transferred
45 requests
0.08 g CO2 per page load
Images 314.9 KiB 80%
Fonts 47.0 KiB 12%
CSS 12.0 KiB 3%
HTML 9.8 KiB 2%
JavaScript 9.4 KiB 2%
Other 1.1 KiB 0%
Other 350 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-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+
JS Execution Cost
75ms total JS execution
PASS
75ms total JS execution
Info::
Unattributable: 75ms CPU time
Warning::
Third-party scripts: 75ms (100% of total)

Main Thread Breakdown

Other 49% Style & Layout 33% Script Evaluation 9% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
Unattributable75ms3ms0ms3rd
A+
Font Loading
3 fonts (47 KB)
PASS
3 fonts (47 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

47 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 286 ms LCP 350 mshttps://adblockplus.org/fonts/Source-Sans-Pro/300/latin.woff2latin.woff2 https://adblockplus.org/fonts/Source-Sans-Pro/300/latin.woff2 — 15.7 KiB — 6 ms — font-display: swaphttps://adblockplus.org/fonts/Source-Sans-Pro/700/latin.woff2latin.woff2 https://adblockplus.org/fonts/Source-Sans-Pro/700/latin.woff2 — 15.4 KiB — 4 ms — font-display: swaphttps://adblockplus.org/fonts/Source-Sans-Pro/400/latin.woff2latin.woff2 https://adblockplus.org/fonts/Source-Sans-Pro/400/latin.woff2 — 15.9 KiB — 5 ms — font-display: swap
latin.woff2 woff2 swap
Size 16 KB
Load time 6 ms
Start 304 ms
Risk FOUT — text flashes from fallback to web font
latin.woff2 woff2 swap
Size 15 KB
Load time 4 ms
Start 305 ms
Risk FOUT — text flashes from fallback to web font
latin.woff2 woff2 swap
Size 16 KB
Load time 5 ms
Start 305 ms
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)
A+
JS Bundles
5 scripts, 0 KB unused
PASS
5 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://adblockplus.org/settings.js?15353407571 KB—✓1st
https://adblockplus.org/js/vendor/bowser.js?15353407574 KB—✓1st
https://adblockplus.org/js/install-button.js?15353407571 KB—✓1st
https://adblockplus.org/js/testing/setup.js?15353407570 KB—✓1st
https://adblockplus.org/js/main.js?15353407573 KB—✓1st
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+
Page Weight Inventory
45 resources · 395 KB · 0 KB savings available
PASS
45 resources · 395 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 395 KB
45 resources · 394.6 KiB · 0 third-party Within 1MB page-weight target
Image 80% · 316.0 KiB
Font 12% · 47.0 KiB
CSS 3% · 12.0 KiB
Document 2% · 9.8 KiB
JavaScript 2% · 9.4 KiB
Other 0% · 350 B
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Quis Lab (Plushie App)

A+
HTTP Caching
max-age=3600 (1 hour)
PASS
max-age=3600 (1 hour)
Info::
Cache-Control header is set
Got: max-age=3600
Info::
Effective TTL: 1 hour (max-age=3600)
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

max-age=3600

DirectiveValueMeaning
max-age3600Cache for 1 hour
Effective TTL: 3600 seconds
Network Waterfall
45 requests over 422ms
INFO
0 ms 200 ms 400 ms FCP 286 ms LCP 350 mshttps://adblockplus.org// https://adblockplus.org/ — 200 — 9.8 KiB — 7 ms — h2https://adblockplus.org/css/defaults.css?1555966099/css/defaults.css?1555966099 https://adblockplus.org/css/defaults.css?1555966099 — 200 — 3.0 KiB — 4 ms — h2https://adblockplus.org/css/fonts.css?1555966099/css/fonts.css?1555966099 https://adblockplus.org/css/fonts.css?1555966099 — 200 — 672 B — 12 ms — h2https://adblockplus.org/css/main.css?1555966099/css/main.css?1555966099 https://adblockplus.org/css/main.css?1555966099 — 200 — 4.1 KiB — 5 ms — h2https://adblockplus.org/css/cookies.css?1555966099/css/cookies.css?1555966099 https://adblockplus.org/css/cookies.css?1555966099 — 200 — 1.6 KiB — 6 ms — h2https://adblockplus.org/settings.js?1535340757/settings.js?1535340757 https://adblockplus.org/settings.js?1535340757 — 200 — 886 B — 229 ms — h2https://adblockplus.org/css/index.css?1555966099/css/index.css?1555966099 https://adblockplus.org/css/index.css?1555966099 — 200 — 2.7 KiB — 7 ms — h2https://adblockplus.org/img/adblockplus-logo-color.svg?1075825257/img/adblockplus-logo-color.svg?107... https://adblockplus.org/img/adblockplus-logo-color.svg?1075825257 — 200 — 4.3 KiB — 8 ms — h2https://adblockplus.org/img/menu-toggle-black.svg?1075825257/img/menu-toggle-black.svg?10758252... https://adblockplus.org/img/menu-toggle-black.svg?1075825257 — 200 — 256 B — 9 ms — h2https://adblockplus.org/img/premium-cookie-filled.svg?1075825257/img/premium-cookie-filled.svg?1075... https://adblockplus.org/img/premium-cookie-filled.svg?1075825257 — 200 — 8.1 KiB — 6 ms — h3https://adblockplus.org/img/hero-ui-illustration.svg?1075825257/img/hero-ui-illustration.svg?10758... https://adblockplus.org/img/hero-ui-illustration.svg?1075825257 — 200 — 30.8 KiB — 6 ms — h3https://adblockplus.org/img/ios-safari-logo.svg?1075825257/img/ios-safari-logo.svg?1075825257 https://adblockplus.org/img/ios-safari-logo.svg?1075825257 — 200 — 654 B — 3 ms — h3https://adblockplus.org/js/vendor/bowser.js?1535340757/js/vendor/bowser.js?1535340757 https://adblockplus.org/js/vendor/bowser.js?1535340757 — 200 — 4.0 KiB — 3 ms — h3https://adblockplus.org/js/install-button.js?1535340757/js/install-button.js?1535340757 https://adblockplus.org/js/install-button.js?1535340757 — 200 — 1.1 KiB — 3 ms — h3https://adblockplus.org/js/testing/setup.js?1535340757/js/testing/setup.js?1535340757 https://adblockplus.org/js/testing/setup.js?1535340757 — 200 — 423 B — 3 ms — h3https://adblockplus.org/js/main.js?1535340757/js/main.js?1535340757 https://adblockplus.org/js/main.js?1535340757 — 200 — 3.0 KiB — 4 ms — h3https://adblockplus.org/en/img/apple-app-store-badge.svg?1075825257/en/img/apple-app-store-badge.svg?1... https://adblockplus.org/en/img/apple-app-store-badge.svg?1075825257 — 200 — 3.9 KiB — 2 ms — h3https://adblockplus.org/img/abb-browser-icon.svg?1075825257/img/abb-browser-icon.svg?107582525... https://adblockplus.org/img/abb-browser-icon.svg?1075825257 — 200 — 22.8 KiB — 5 ms — h3https://adblockplus.org/en/img/google-play-badge.png?1075825257/en/img/google-play-badge.png?10758... https://adblockplus.org/en/img/google-play-badge.png?1075825257 — 200 — 14.5 KiB — 2 ms — h3https://adblockplus.org/img/samsung-internet-logo.png?1075825257/img/samsung-internet-logo.png?1075... https://adblockplus.org/img/samsung-internet-logo.png?1075825257 — 200 — 24.6 KiB — 3 ms — h3https://adblockplus.org/img/media/mediapost.png?1075825257/img/media/mediapost.png?1075825257 https://adblockplus.org/img/media/mediapost.png?1075825257 — 200 — 3.1 KiB — 49 ms — h3https://adblockplus.org/img/media/nyt.png?1075825257/img/media/nyt.png?1075825257 https://adblockplus.org/img/media/nyt.png?1075825257 — 200 — 4.2 KiB — 51 ms — h3https://adblockplus.org/img/media/wsj.png?1075825257/img/media/wsj.png?1075825257 https://adblockplus.org/img/media/wsj.png?1075825257 — 200 — 2.9 KiB — 51 ms — h3https://adblockplus.org/img/media/techcrunch.png?1075825257/img/media/techcrunch.png?107582525... https://adblockplus.org/img/media/techcrunch.png?1075825257 — 200 — 2.0 KiB — 52 ms — h3https://adblockplus.org/img/media/business-insider.png?1075825257/img/media/business-insider.png?107... https://adblockplus.org/img/media/business-insider.png?1075825257 — 200 — 4.2 KiB — 56 ms — h3https://adblockplus.org/img/rocket-illustration.svg?1075825257/img/rocket-illustration.svg?107582... https://adblockplus.org/img/rocket-illustration.svg?1075825257 — 200 — 24.4 KiB — 15 ms — h3https://adblockplus.org/img/lock-illustration.svg?1075825257/img/lock-illustration.svg?10758252... https://adblockplus.org/img/lock-illustration.svg?1075825257 — 200 — 19.5 KiB — 8 ms — h3https://adblockplus.org/img/checkmark-illustration.svg?1075825257/img/checkmark-illustration.svg?107... https://adblockplus.org/img/checkmark-illustration.svg?1075825257 — 200 — 19.4 KiB — 14 ms — h3https://adblockplus.org/img/abb-cross-promo-message.svg?1075825257/img/abb-cross-promo-message.svg?10... https://adblockplus.org/img/abb-cross-promo-message.svg?1075825257 — 200 — 6.7 KiB — 14 ms — h3https://adblockplus.org/img/pointing-arrow.svg?1075825257/img/pointing-arrow.svg?1075825257 https://adblockplus.org/img/pointing-arrow.svg?1075825257 — 200 — 935 B — 14 ms — h3
0 ms 200 ms 400 ms FCP 286 ms LCP 350 mshttps://adblockplus.org// https://adblockplus.org/ — 200 — 9.8 KiB — 7 ms — h2https://adblockplus.org/css/defaults.css?1555966099/css/defaults.css?1555966099 https://adblockplus.org/css/defaults.css?1555966099 — 200 — 3.0 KiB — 4 ms — h2https://adblockplus.org/css/fonts.css?1555966099/css/fonts.css?1555966099 https://adblockplus.org/css/fonts.css?1555966099 — 200 — 672 B — 12 ms — h2https://adblockplus.org/css/main.css?1555966099/css/main.css?1555966099 https://adblockplus.org/css/main.css?1555966099 — 200 — 4.1 KiB — 5 ms — h2https://adblockplus.org/css/cookies.css?1555966099/css/cookies.css?1555966099 https://adblockplus.org/css/cookies.css?1555966099 — 200 — 1.6 KiB — 6 ms — h2https://adblockplus.org/settings.js?1535340757/settings.js?1535340757 https://adblockplus.org/settings.js?1535340757 — 200 — 886 B — 229 ms — h2https://adblockplus.org/css/index.css?1555966099/css/index.css?1555966099 https://adblockplus.org/css/index.css?1555966099 — 200 — 2.7 KiB — 7 ms — h2https://adblockplus.org/img/adblockplus-logo-color.svg?1075825257/img/adblockplus-logo-color.svg?107... https://adblockplus.org/img/adblockplus-logo-color.svg?1075825257 — 200 — 4.3 KiB — 8 ms — h2https://adblockplus.org/img/menu-toggle-black.svg?1075825257/img/menu-toggle-black.svg?10758252... https://adblockplus.org/img/menu-toggle-black.svg?1075825257 — 200 — 256 B — 9 ms — h2https://adblockplus.org/img/premium-cookie-filled.svg?1075825257/img/premium-cookie-filled.svg?1075... https://adblockplus.org/img/premium-cookie-filled.svg?1075825257 — 200 — 8.1 KiB — 6 ms — h3https://adblockplus.org/img/hero-ui-illustration.svg?1075825257/img/hero-ui-illustration.svg?10758... https://adblockplus.org/img/hero-ui-illustration.svg?1075825257 — 200 — 30.8 KiB — 6 ms — h3https://adblockplus.org/img/ios-safari-logo.svg?1075825257/img/ios-safari-logo.svg?1075825257 https://adblockplus.org/img/ios-safari-logo.svg?1075825257 — 200 — 654 B — 3 ms — h3https://adblockplus.org/js/vendor/bowser.js?1535340757/js/vendor/bowser.js?1535340757 https://adblockplus.org/js/vendor/bowser.js?1535340757 — 200 — 4.0 KiB — 3 ms — h3https://adblockplus.org/js/install-button.js?1535340757/js/install-button.js?1535340757 https://adblockplus.org/js/install-button.js?1535340757 — 200 — 1.1 KiB — 3 ms — h3https://adblockplus.org/js/testing/setup.js?1535340757/js/testing/setup.js?1535340757 https://adblockplus.org/js/testing/setup.js?1535340757 — 200 — 423 B — 3 ms — h3https://adblockplus.org/js/main.js?1535340757/js/main.js?1535340757 https://adblockplus.org/js/main.js?1535340757 — 200 — 3.0 KiB — 4 ms — h3https://adblockplus.org/en/img/apple-app-store-badge.svg?1075825257/en/img/apple-app-store-badge.svg?1... https://adblockplus.org/en/img/apple-app-store-badge.svg?1075825257 — 200 — 3.9 KiB — 2 ms — h3https://adblockplus.org/img/abb-browser-icon.svg?1075825257/img/abb-browser-icon.svg?107582525... https://adblockplus.org/img/abb-browser-icon.svg?1075825257 — 200 — 22.8 KiB — 5 ms — h3https://adblockplus.org/en/img/google-play-badge.png?1075825257/en/img/google-play-badge.png?10758... https://adblockplus.org/en/img/google-play-badge.png?1075825257 — 200 — 14.5 KiB — 2 ms — h3https://adblockplus.org/img/samsung-internet-logo.png?1075825257/img/samsung-internet-logo.png?1075... https://adblockplus.org/img/samsung-internet-logo.png?1075825257 — 200 — 24.6 KiB — 3 ms — h3https://adblockplus.org/img/media/mediapost.png?1075825257/img/media/mediapost.png?1075825257 https://adblockplus.org/img/media/mediapost.png?1075825257 — 200 — 3.1 KiB — 49 ms — h3https://adblockplus.org/img/media/nyt.png?1075825257/img/media/nyt.png?1075825257 https://adblockplus.org/img/media/nyt.png?1075825257 — 200 — 4.2 KiB — 51 ms — h3https://adblockplus.org/img/media/wsj.png?1075825257/img/media/wsj.png?1075825257 https://adblockplus.org/img/media/wsj.png?1075825257 — 200 — 2.9 KiB — 51 ms — h3https://adblockplus.org/img/media/techcrunch.png?1075825257/img/media/techcrunch.png?107582525... https://adblockplus.org/img/media/techcrunch.png?1075825257 — 200 — 2.0 KiB — 52 ms — h3https://adblockplus.org/img/media/business-insider.png?1075825257/img/media/business-insider.png?107... https://adblockplus.org/img/media/business-insider.png?1075825257 — 200 — 4.2 KiB — 56 ms — h3https://adblockplus.org/img/rocket-illustration.svg?1075825257/img/rocket-illustration.svg?107582... https://adblockplus.org/img/rocket-illustration.svg?1075825257 — 200 — 24.4 KiB — 15 ms — h3https://adblockplus.org/img/lock-illustration.svg?1075825257/img/lock-illustration.svg?10758252... https://adblockplus.org/img/lock-illustration.svg?1075825257 — 200 — 19.5 KiB — 8 ms — h3https://adblockplus.org/img/checkmark-illustration.svg?1075825257/img/checkmark-illustration.svg?107... https://adblockplus.org/img/checkmark-illustration.svg?1075825257 — 200 — 19.4 KiB — 14 ms — h3https://adblockplus.org/img/abb-cross-promo-message.svg?1075825257/img/abb-cross-promo-message.svg?10... https://adblockplus.org/img/abb-cross-promo-message.svg?1075825257 — 200 — 6.7 KiB — 14 ms — h3https://adblockplus.org/img/pointing-arrow.svg?1075825257/img/pointing-arrow.svg?1075825257 https://adblockplus.org/img/pointing-arrow.svg?1075825257 — 200 — 935 B — 14 ms — h3https://adblockplus.org/img/android-video-illustration.svg?1075825257/img/android-video-illustration.svg... https://adblockplus.org/img/android-video-illustration.svg?1075825257 — 200 — 87.6 KiB — 22 ms — h3https://adblockplus.org/img/abp-laptop.svg?1075825257/img/abp-laptop.svg?1075825257 https://adblockplus.org/img/abp-laptop.svg?1075825257 — 200 — 21.6 KiB — 22 ms — h3https://adblockplus.org/img/footer-twitter-glyphicon.png?1075825257/img/footer-twitter-glyphicon.png?1... https://adblockplus.org/img/footer-twitter-glyphicon.png?1075825257 — 200 — 1.1 KiB — 13 ms — 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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 75ms · 0KB · €1/mo
Unattributable
Other
Optional
Execution 75ms
Transfer 0 KB
Monthly Cost €1/mo

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

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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