Skip to content
https://www.reuters.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
66
GRADE
D
FIX
5
REVIEW
2
PASS
5
INFO
2

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

Mobile Desktop
25
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
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.
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.

9.15 s

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

21.19 s

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

14.40 s

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.

31.12 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.

74.11 s

Page Load Progression

2.1 s
4.2 s
6.3 s
8.4 s
10.5 s
12.6 s
14.7 s
16.9 s
Checks
14
5 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
8.1 MB transferred, 790 requests
FIX
8.1 MB transferred, 790 requests
Critical::
Page weighs 29.1 MB (8.1 MB transferred)
Warning::
JavaScript is 6.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 6.1 MB
Warning::
790 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.7 g CO2 per page load
8.1 MB / 2.4 MB budget
8.1 MB transferred
790 requests
1.7 g CO2 per page load
JavaScript 6.1 MiB 75%
Images 742.2 KiB 9%
HTML 618.4 KiB 7%
Other 307.7 KiB 4%
Other 151.9 KiB 2%
Other 107.2 KiB 1%
Fonts 107.2 KiB 1%
CSS 78.1 KiB 1%
Other 1.0 KiB 0%
Other 940 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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
81% third-party, 0 ms blocking
FIX
81% third-party, 0 ms blocking
Warning::
Third-party code accounts for 81% of page weight (6.6 MiB of 8.1 MiB)
Info::
Third-party blocking time is low (0 ms)
19%
81%
First-party Third-party
F
JS Execution Cost
Action
60387ms total JS execution
FIX
60387ms total JS execution
Warning::
https://www.reuters.com/pf/dist/engine/react.js?d=...: 7059ms CPU time
Warning::
https://aam.a47b.com/aam?asid=tD1xIAPJ&af=300x250&...: 6483ms CPU time
Warning::
https://www.reuters.com/: 6106ms CPU time
Warning::
Unattributable: 4735ms CPU time
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 3795ms CPU time
Warning::
Third-party scripts: 45997ms (76% of total)

Main Thread Breakdown

Script Evaluation 57% Other 22% Style & Layout 8% Rendering 5% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://www.reuters.com/pf/dist/engine/react.js?d=356&mxId=000000007059ms4417ms46ms1st
https://aam.a47b.com/aam?asid=tD1xIAPJ&af=300x250&ad=138548478295&spl=/4735792/reuters.com/home&adv=5744295721&li=7203817874&io=3961852309&pl=22060190036&ra=1100639566&st=reuters.com&edst=22060190036&cu1=mpu&cu2=home&cu3=6483ms253ms9ms3rd
https://www.reuters.com/6106ms307ms135ms1st
Unattributable4735ms1117ms0ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604010101/pubads_impl.js?cb=310975853795ms3320ms74ms3rd
https://scripts.mf.webcontentassessor.com/scripts/d06ef93c25139616c54db7ca384a5b08978435f6af02d1bae5fa0e14a8bba30f2666ms2123ms83ms3rd
https://cds.connatix.com/p/276446261/sax.sdk.bridge.js2442ms2178ms66ms3rd
https://cdn.permutive.com/a55a84b3-9632-4869-b625-3d8ef43ed18d-web.js2350ms961ms99ms3rd
https://www.googletagmanager.com/gtag/js?id=G-WBSR7WLTGD1832ms1708ms103ms3rd
https://cdn.jwplayer.com/libraries/6R96ZZcw.js1663ms1357ms92ms3rd

Showing top 10 of 87 scripts

F
JS Bundles
Action
166 scripts, 2.0 MB unused
FIX
166 scripts, 2.0 MB unused
Warning::
https://www.reuters.com/pf/dist/components/combina...: 342 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ssl.p.jwpcdn.com/player/v/8.46.1/provider....: 118 KB unused (85%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://imasdk.googleapis.com/js/sdkloader/ima3.js: 96 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cds.connatix.com/p/276446261/sax.sdk.bridg...: 84 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 80 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 2.0 MB
2093 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.reuters.com/pf/dist/components/combinations/landing.js?d=356&mxId=00000000689 KB342 KB (50%)✓1st
https://ssl.p.jwpcdn.com/player/v/8.46.1/provider.hlsjs.js139 KB118 KB (85%)✓3rd
https://imasdk.googleapis.com/js/sdkloader/ima3.js147 KB96 KB (66%)✓3rd
https://cds.connatix.com/p/276446261/sax.sdk.bridge.js101 KB84 KB (83%)✓3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604010101/pubads_impl.js?cb=31097585182 KB80 KB (44%)✓3rd
https://cdn.cookielaw.org/scripttemplates/202601.1.0/otBannerSdk.js127 KB80 KB (63%)✓3rd
https://a.pub.network/reuters-com/pubfig.engine.mobile.js168 KB78 KB (47%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-K5WTBZN165 KB77 KB (47%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-FVWZ0RM4DH&l=audDataLayer143 KB70 KB (49%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=G-XXXXXXXXXX&cx=c&gtm=4e6411136 KB70 KB (52%)✓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

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: max-age=0, private, 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

max-age=0, private, no-cache, no-store, must-revalidate

DirectiveValueMeaning
max-age0Cache for 0 seconds
private—Only browser cache, not CDN/proxy
no-cache—Cache but always revalidate first
no-store—Never cache this response
must-revalidate—Must recheck with server after expiry
B
Image Optimization
129 images, 0 KB saveable
REVIEW
129 images, 0 KB saveable
Info::
All images are well-optimized
129 images 741 KB
0 oversized -0 KB
93 legacy format
0 missing dimensions CLS risk
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
5 fonts (107 KB)
PASS
5 fonts (107 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

107 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 FCP 9.2 s LCP 21.2 shttps://www.reuters.com/static/fonts/knowledge/knowledge-bold.woff2knowledge-bold.woff2 https://www.reuters.com/static/fonts/knowledge/knowledge-bold.woff2 — 18.8 KiB — 0 ms — font-display: swaphttps://www.reuters.com/static/fonts/knowledge/knowledge-medium.woff2knowledge-medium.woff2 https://www.reuters.com/static/fonts/knowledge/knowledge-medium.woff2 — 19.8 KiB — 0 ms — font-display: swaphttps://www.reuters.com/static/fonts/knowledge/knowledge-regular.woff2knowledge-regular.woff2 https://www.reuters.com/static/fonts/knowledge/knowledge-regular.woff2 — 19.7 KiB — 0 ms — font-display: swaphttps://static.reutersmedia.net/resources_v2/fonts/Knowledge-Medium.woffKnowledge-Medium.woff https://static.reutersmedia.net/resources_v2/fonts/Knowledge-Medium.woff — 24.6 KiB — 0 ms — font-display: swaphttps://static.reutersmedia.net/resources_v2/fonts/Knowledge-Regular.woffKnowledge-Regular.woff https://static.reutersmedia.net/resources_v2/fonts/Knowledge-Regular.woff — 24.3 KiB — 0 ms — font-display: swap
knowledge-bold.woff2 woff2 swap
Size 19 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
knowledge-medium.woff2 woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
knowledge-regular.woff2 woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Knowledge-Medium.woff woff swap
Size 25 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Knowledge-Regular.woff woff swap
Size 24 KB
Load time 0 ms
Start 0 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 ~15 KB and ~30 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
790 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
76% of JavaScript execution is third-party
First-party Third-party 45997ms · 4452KB · CA$636/mo
aam.a47b.com
Other
Costly
Execution 6483ms
Transfer 24 KB
Monthly Cost CA$90/mo
Unattributable
Other
Costly
Execution 4735ms
Transfer 0 KB
Monthly Cost CA$65/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 3795ms
Transfer 182 KB
Unused 44%
Monthly Cost CA$52/mo
scripts.mf.webcontentassessor.com
Other
Costly
Execution 2666ms
Transfer 130 KB
Monthly Cost CA$37/mo
cds.connatix.com
Other
Costly
Execution 2442ms
Transfer 101 KB
Unused 83%
Monthly Cost CA$34/mo
cdn.permutive.com
Other
Costly
Execution 2350ms
Transfer 160 KB
Monthly Cost CA$32/mo
Google Tag Manager
Tag Manager
Costly
Execution 1832ms
Transfer 168 KB
Unused 33%
Monthly Cost CA$25/mo
cdn.jwplayer.com
Other
Costly
Execution 1663ms
Transfer 65 KB
Unused 65%
Monthly Cost CA$23/mo
a.pub.network
Other
Costly
Execution 1164ms
Transfer 168 KB
Unused 47%
Monthly Cost CA$16/mo
dd.reuters.com
Other
Costly
Execution 982ms
Transfer 43 KB
Monthly Cost CA$14/mo
cds.connatix.com
Other
Costly
Execution 928ms
Transfer 63 KB
Unused 46%
Monthly Cost CA$13/mo
Google Tag Manager
Tag Manager
Costly
Execution 857ms
Transfer 165 KB
Unused 47%
Monthly Cost CA$12/mo
cds.connatix.com
Other
Costly
Execution 836ms
Transfer 56 KB
Unused 44%
Monthly Cost CA$12/mo
jsconfig.adsafeprotected.com
Other
Costly
Execution 798ms
Transfer 4 KB
Monthly Cost CA$11/mo
pagead2.googlesyndication.com
Other
Costly
Execution 721ms
Transfer 0 KB
Unused 41%
Monthly Cost CA$10/mo
www.datadoghq-browser-agent.com
Other
Costly
Execution 719ms
Transfer 48 KB
Unused 57%
Monthly Cost CA$10/mo
cdn.id5-sync.com
Other
Costly
Execution 694ms
Transfer 0 KB
Monthly Cost CA$10/mo
imasdk.googleapis.com
Other
Costly
Execution 691ms
Transfer 147 KB
Unused 66%
Monthly Cost CA$10/mo
www.dianomi.com
Other
Costly
Execution 548ms
Transfer 39 KB
Unused 60%
Monthly Cost CA$8/mo
a.pub.network
Other
Costly
Execution 536ms
Transfer 205 KB
Unused 34%
Monthly Cost CA$7/mo
static.adsafeprotected.com
Other
Costly
Execution 499ms
Transfer 0 KB
Monthly Cost CA$7/mo
ssl.p.jwpcdn.com
Other
Costly
Execution 484ms
Transfer 139 KB
Unused 85%
Monthly Cost CA$7/mo
Google Tag Manager
Tag Manager
Costly
Execution 459ms
Transfer 145 KB
Unused 34%
Monthly Cost CA$6/mo
cd.connatix.com
Other
Costly
Execution 417ms
Transfer 83 KB
Unused 38%
Monthly Cost CA$6/mo
btloader.com
Other
Costly
Execution 378ms
Transfer 30 KB
Monthly Cost CA$5/mo
c.amazon-adsystem.com
Other
Costly
Execution 349ms
Transfer 90 KB
Unused 37%
Monthly Cost CA$5/mo
OneTrust
Consent
Essential
Execution 330ms
Transfer 22 KB
Monthly Cost CA$5/mo
Google Tag Manager
Tag Manager
Costly
Execution 325ms
Transfer 136 KB
Unused 39%
Monthly Cost CA$4/mo
config.aps.amazon-adsystem.com
Other
Costly
Execution 322ms
Transfer 8 KB
Monthly Cost CA$4/mo
Google Tag Manager
Tag Manager
Costly
Execution 295ms
Transfer 128 KB
Unused 42%
Monthly Cost CA$4/mo
aka.clipcentric.com
Other
Costly
Execution 289ms
Transfer 28 KB
Monthly Cost CA$4/mo
Google Tag Manager
Tag Manager
Costly
Execution 272ms
Transfer 128 KB
Unused 47%
Monthly Cost CA$4/mo
freestar.solutions.cdn.optable.co
Other
Costly
Execution 266ms
Transfer 17 KB
Monthly Cost CA$4/mo
jsconfig.adsafeprotected.com
Other
Costly
Execution 258ms
Transfer 4 KB
Monthly Cost CA$4/mo
Google Tag Manager
Tag Manager
Costly
Execution 227ms
Transfer 136 KB
Unused 52%
Monthly Cost CA$3/mo
scaredsnakes.com
Other
Costly
Execution 224ms
Transfer 36 KB
Monthly Cost CA$3/mo
pagead2.googlesyndication.com
Other
Costly
Execution 222ms
Transfer 0 KB
Monthly Cost CA$3/mo
OneTrust
Consent
Essential
Execution 209ms
Transfer 127 KB
Unused 63%
Monthly Cost CA$3/mo
metrics.rapidedge.io
Other
Costly
Execution 206ms
Transfer 30 KB
Monthly Cost CA$3/mo
Google Tag Manager
Tag Manager
Costly
Execution 205ms
Transfer 143 KB
Unused 49%
Monthly Cost CA$3/mo
d-code.liadm.com
Other
Costly
Execution 201ms
Transfer 47 KB
Monthly Cost CA$3/mo
OneTrust
Consent
Essential
Execution 191ms
Transfer 9 KB
Monthly Cost CA$3/mo
pixel.adsafeprotected.com
Other
Optional
Execution 173ms
Transfer 92 KB
Unused 39%
Monthly Cost CA$2/mo
Facebook Pixel
Advertising
Optional
Execution 173ms
Transfer 95 KB
Unused 33%
Monthly Cost CA$2/mo
ssl.p.jwpcdn.com
Other
Optional
Execution 160ms
Transfer 99 KB
Unused 27%
Monthly Cost CA$2/mo
cdn.sophi.io
Other
Optional
Execution 160ms
Transfer 40 KB
Monthly Cost CA$2/mo
ssl.p.jwpcdn.com
Other
Optional
Execution 160ms
Transfer 29 KB
Monthly Cost CA$2/mo
siteintercept.qualtrics.com
Other
Optional
Execution 153ms
Transfer 36 KB
Unused 62%
Monthly Cost CA$2/mo
b-code.liadm.com
Other
Optional
Execution 145ms
Transfer 46 KB
Monthly Cost CA$2/mo
static.chartbeat.com
Other
Optional
Execution 141ms
Transfer 25 KB
Monthly Cost CA$2/mo
a.pub.network
Other
Optional
Execution 136ms
Transfer 29 KB
Monthly Cost CA$2/mo
pixel.adsafeprotected.com
Other
Optional
Execution 135ms
Transfer 92 KB
Unused 38%
Monthly Cost CA$2/mo
static.adsafeprotected.com
Other
Optional
Execution 132ms
Transfer 7 KB
Monthly Cost CA$2/mo
cdn1.anonymised.io
Other
Optional
Execution 124ms
Transfer 24 KB
Monthly Cost CA$2/mo
Facebook Pixel
Advertising
Optional
Execution 122ms
Transfer 40 KB
Monthly Cost CA$2/mo
Segment
Analytics
Optional
Execution 120ms
Transfer 55 KB
Unused 55%
Monthly Cost CA$2/mo
cds.connatix.com
Other
Optional
Execution 114ms
Transfer 12 KB
Monthly Cost CA$2/mo
Google Analytics
Analytics
Optional
Execution 104ms
Transfer 21 KB
Monthly Cost CA$1/mo
web-sdk-cdn.singular.net
Other
Optional
Execution 100ms
Transfer 48 KB
Monthly Cost CA$1/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 99ms
Transfer 35 KB
Monthly Cost CA$1/mo
static.criteo.net
Other
Optional
Execution 96ms
Transfer 15 KB
Monthly Cost CA$1/mo
ak.sail-horizon.com
Other
Optional
Execution 92ms
Transfer 55 KB
Unused 72%
Monthly Cost CA$1/mo
s.go-mpulse.net
Other
Optional
Execution 92ms
Transfer 56 KB
Unused 65%
Monthly Cost CA$1/mo
launchpad.privacymanager.io
Other
Optional
Execution 86ms
Transfer 41 KB
Monthly Cost CA$1/mo
Segment
Analytics
Optional
Execution 83ms
Transfer 22 KB
Monthly Cost CA$1/mo
launchpad-wrapper.privacymanager.io
Other
Optional
Execution 77ms
Transfer 2 KB
Monthly Cost CA$1/mo
cds.connatix.com
Other
Optional
Execution 75ms
Transfer 34 KB
Monthly Cost CA$1/mo
secure.cdn.fastclick.net
Other
Optional
Execution 74ms
Transfer 22 KB
Monthly Cost CA$1/mo
cdn.hadronid.net
Other
Optional
Execution 72ms
Transfer 0 KB
Monthly Cost CA$1/mo
ep2.adtrafficquality.google
Other
Optional
Execution 72ms
Transfer 8 KB
Monthly Cost CA$1/mo
oa.openxcdn.net
Other
Optional
Execution 69ms
Transfer 8 KB
Monthly Cost CA$1/mo
tags.srv.stackadapt.com
Other
Optional
Execution 64ms
Transfer 8 KB
Monthly Cost CA$1/mo
amplify.outbrain.com
Other
Optional
Execution 64ms
Transfer 18 KB
Monthly Cost CA$1/mo
ssl.p.jwpcdn.com
Other
Optional
Execution 62ms
Transfer 22 KB
Monthly Cost CA$1/mo
p.ad.gt
Other
Optional
Execution 60ms
Transfer 10 KB
Monthly Cost CA$1/mo
LinkedIn Insight
Advertising
Optional
Execution 59ms
Transfer 19 KB
Monthly Cost CA$1/mo
OneTrust
Consent
Essential
Execution 59ms
Transfer 6 KB
Monthly Cost CA$1/mo
sb.scorecardresearch.com
Other
Optional
Execution 58ms
Transfer 0 KB
Monthly Cost CA$1/mo
js.outcomes.net
Other
Optional
Execution 56ms
Transfer 0 KB
Monthly Cost CA$1/mo
Segment
Analytics
Optional
Execution 56ms
Transfer 29 KB
Monthly Cost CA$1/mo
sb.scorecardresearch.com
Other
Optional
Execution 55ms
Transfer 0 KB
Monthly Cost CA$1/mo

These scripts may cost more than they're worth

  • aam.a47b.com adds 6483ms and costs ~CA$90/month
  • Unattributable adds 4735ms and costs ~CA$65/month
  • securepubads.g.doubleclick.net adds 3795ms and costs ~CA$52/month
  • scripts.mf.webcontentassessor.com adds 2666ms and costs ~CA$37/month
  • cds.connatix.com adds 2442ms and costs ~CA$34/month
  • cdn.permutive.com adds 2350ms and costs ~CA$32/month
  • Google Tag Manager adds 1832ms and costs ~CA$25/month
  • cdn.jwplayer.com adds 1663ms and costs ~CA$23/month
  • a.pub.network adds 1164ms and costs ~CA$16/month
  • dd.reuters.com adds 982ms and costs ~CA$14/month
  • cds.connatix.com adds 928ms and costs ~CA$13/month
  • Google Tag Manager adds 857ms and costs ~CA$12/month
  • cds.connatix.com adds 836ms and costs ~CA$12/month
  • jsconfig.adsafeprotected.com adds 798ms and costs ~CA$11/month
  • pagead2.googlesyndication.com adds 721ms and costs ~CA$10/month
  • www.datadoghq-browser-agent.com adds 719ms and costs ~CA$10/month
  • cdn.id5-sync.com adds 694ms and costs ~CA$10/month
  • imasdk.googleapis.com adds 691ms and costs ~CA$10/month
  • www.dianomi.com adds 548ms and costs ~CA$8/month
  • a.pub.network adds 536ms and costs ~CA$7/month
  • static.adsafeprotected.com adds 499ms and costs ~CA$7/month
  • ssl.p.jwpcdn.com adds 484ms and costs ~CA$7/month
  • Google Tag Manager adds 459ms and costs ~CA$6/month
  • cd.connatix.com adds 417ms and costs ~CA$6/month
  • btloader.com adds 378ms and costs ~CA$5/month
  • c.amazon-adsystem.com adds 349ms and costs ~CA$5/month
  • Google Tag Manager adds 325ms and costs ~CA$4/month
  • config.aps.amazon-adsystem.com adds 322ms and costs ~CA$4/month
  • Google Tag Manager adds 295ms and costs ~CA$4/month
  • aka.clipcentric.com adds 289ms and costs ~CA$4/month
  • Google Tag Manager adds 272ms and costs ~CA$4/month
  • freestar.solutions.cdn.optable.co adds 266ms and costs ~CA$4/month
  • jsconfig.adsafeprotected.com adds 258ms and costs ~CA$4/month
  • Google Tag Manager adds 227ms and costs ~CA$3/month
  • scaredsnakes.com adds 224ms and costs ~CA$3/month
  • pagead2.googlesyndication.com adds 222ms and costs ~CA$3/month
  • metrics.rapidedge.io adds 206ms and costs ~CA$3/month
  • Google Tag Manager adds 205ms and costs ~CA$3/month
  • d-code.liadm.com adds 201ms and costs ~CA$3/month

76% 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

aam.a47b.com takes 6483ms 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 4735ms 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

securepubads.g.doubleclick.net takes 3795ms 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

scripts.mf.webcontentassessor.com takes 2666ms 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

cds.connatix.com takes 2442ms 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

83% of cds.connatix.com'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

cdn.permutive.com takes 2350ms 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 1832ms 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.jwplayer.com takes 1663ms 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

65% of cdn.jwplayer.com'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

a.pub.network takes 1164ms 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

dd.reuters.com takes 982ms 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

cds.connatix.com takes 928ms 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 857ms 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

cds.connatix.com takes 836ms 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

jsconfig.adsafeprotected.com takes 798ms 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

pagead2.googlesyndication.com takes 721ms 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.datadoghq-browser-agent.com takes 719ms 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

57% of www.datadoghq-browser-agent.com'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

cdn.id5-sync.com takes 694ms 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

imasdk.googleapis.com takes 691ms 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

66% of imasdk.googleapis.com'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

www.dianomi.com takes 548ms 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

60% of www.dianomi.com'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

a.pub.network takes 536ms 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

static.adsafeprotected.com takes 499ms 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

ssl.p.jwpcdn.com takes 484ms 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

85% of ssl.p.jwpcdn.com'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

Google Tag Manager 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

cd.connatix.com takes 417ms 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

btloader.com takes 378ms 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

c.amazon-adsystem.com takes 349ms 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 325ms 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

config.aps.amazon-adsystem.com takes 322ms 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 295ms 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

aka.clipcentric.com takes 289ms 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 272ms 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

freestar.solutions.cdn.optable.co takes 266ms 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

jsconfig.adsafeprotected.com takes 258ms 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 227ms 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 Google Tag Manager'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

scaredsnakes.com takes 224ms 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

pagead2.googlesyndication.com takes 222ms 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

63% of OneTrust'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

metrics.rapidedge.io takes 206ms 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 205ms 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

d-code.liadm.com takes 201ms 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

62% of siteintercept.qualtrics.com'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

55% of Segment'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

72% of ak.sail-horizon.com'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

65% of s.go-mpulse.net'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.

Send Feedback