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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
66
GRADE
D
FIX
4
REVIEW
2
PASS
6
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.
83
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
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.

6.76 s

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

23.12 s

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

8.71 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.

15.51 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.

51.21 s

Page Load Progression

602 ms
1.2 s
1.8 s
2.4 s
3.0 s
3.6 s
4.2 s
4.8 s
Checks
14
6 PASS 2 REVIEW 4 FIX
F
Page Weight Budget
Action
6.9 MB transferred, 392 requests
FIX
6.9 MB transferred, 392 requests
Critical::
Page weighs 28.3 MB (6.9 MB transferred)
Warning::
JavaScript is 3.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.8 MB
Warning::
Images are 1.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.3 MB
Info::
Fonts are 350 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 350 KB
Warning::
392 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.4 g CO2 per page load
6.9 MB / 2.4 MB budget
6.9 MB transferred
392 requests
1.4 g CO2 per page load
JavaScript 3.8 MiB 56%
Images 1.3 MiB 19%
Other 757.4 KiB 11%
HTML 436.8 KiB 6%
Fonts 350.3 KiB 5%
Other 95.4 KiB 1%
Other 73.1 KiB 1%
CSS 44.8 KiB 1%
Other 3.0 KiB 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

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

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
89% third-party, 0 ms blocking
FIX
89% third-party, 0 ms blocking
Warning::
Third-party code accounts for 89% of page weight (6.1 MiB of 6.9 MiB)
Info::
Third-party blocking time is low (0 ms)
89%
First-party Third-party
F
JS Execution Cost
Action
52165ms total JS execution
FIX
52165ms total JS execution
Warning::
https://i.forbesimg.com/simple-site/_next/static/c...: 8922ms CPU time
Warning::
https://www.forbes.com/: 7808ms CPU time
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 6710ms CPU time
Warning::
Unattributable: 4742ms CPU time
Warning::
https://jsconfig.adsafeprotected.com/jsconfig/jloa...: 3516ms CPU time
Warning::
Third-party scripts: 44357ms (85% of total)

Main Thread Breakdown

Script Evaluation 53% Other 21% Style & Layout 15% Script Parsing & Compilation 5% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://i.forbesimg.com/simple-site/_next/static/chunks/3297-3348bed331a8c558.js8922ms1087ms22ms3rd
https://www.forbes.com/7808ms296ms8ms1st
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js6710ms5532ms543ms3rd
Unattributable4742ms705ms0ms3rd
https://jsconfig.adsafeprotected.com/jsconfig/jload/930392?cbName=__IntegralAS__8545&anId=930392&campId=320x50&pubId=5324790959&chanId=23319626272&placementId=6328227324&pubCreative=138436601168&pubOrder=3218637725&cb=787560657&adsafe_par=3516ms3078ms1ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202603310101/pubads_impl.js2837ms2418ms203ms3rd
https://i.forbesimg.com/simple-site/_next/static/chunks/framework-c9e62a73d4ceebe9.js2070ms1409ms27ms3rd
https://forbes.blueconic.net/script.js1561ms1387ms16ms3rd
https://cdn.p-n.io/pushly-sdk.min.js?domain_key=qmhdz0KFKfsfhQQeCP5Js1NFta1P8jkwbf051493ms1318ms20ms3rd
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js1490ms1042ms440ms3rd

Showing top 10 of 51 scripts

F
JS Bundles
Action
120 scripts, 3.0 MB unused
FIX
120 scripts, 3.0 MB unused
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 166 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 166 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 166 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 166 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 166 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 3.0 MB
3030 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB166 KB (46%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB166 KB (46%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB166 KB (46%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB166 KB (46%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB166 KB (46%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB166 KB (46%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB166 KB (46%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB166 KB (46%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB166 KB (46%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB166 KB (46%)✓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

B
Image Optimization
77 images, 0 KB saveable
REVIEW
77 images, 0 KB saveable
Info::
All images are well-optimized
77 images 1.3 MB
0 oversized -0 KB
59 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
18 fonts (350 KB)
PASS
18 fonts (350 KB)
Info::
18 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

18

350 KB total

Render-blocking

0

of 18

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 6.8 s LCP 23.1 shttps://i.forbesimg.com/assets/fonts/Schnyder/Schnyder-SDemi-Web.woff2Schnyder-SDemi-Web.woff2 https://i.forbesimg.com/assets/fonts/Schnyder/Schnyder-SDemi-Web.woff2 — 32.5 KiB — 0 ms — font-display: swaphttps://i.forbesimg.com/assets/fonts/Graphik/Graphik-Regular-Web.woff2Graphik-Regular-Web.woff2 https://i.forbesimg.com/assets/fonts/Graphik/Graphik-Regular-Web.woff2 — 30.3 KiB — 0 ms — font-display: swaphttps://i.forbesimg.com/assets/fonts/Highlander/Highlander-Bold.woff2Highlander-Bold.woff2 https://i.forbesimg.com/assets/fonts/Highlander/Highlander-Bold.woff2 — 45.2 KiB — 0 ms — font-display: swaphttps://i.forbesimg.com/assets/fonts/Graphik/Graphik-Regular-Web.woff2Graphik-Regular-Web.woff2 https://i.forbesimg.com/assets/fonts/Graphik/Graphik-Regular-Web.woff2 — 247 B — 0 ms — font-display: swaphttps://i.forbesimg.com/assets/fonts/Graphik/Graphik-Medium-Web.woff2Graphik-Medium-Web.woff2 https://i.forbesimg.com/assets/fonts/Graphik/Graphik-Medium-Web.woff2 — 36.0 KiB — 0 ms — font-display: swaphttps://i.forbesimg.com/assets/fonts/Schnyder/Schnyder-SDemi-Web.woff2Schnyder-SDemi-Web.woff2 https://i.forbesimg.com/assets/fonts/Schnyder/Schnyder-SDemi-Web.woff2 — 247 B — 0 ms — font-display: swaphttps://i.forbesimg.com/assets/fonts/highlander/highlander-bold.woff2highlander-bold.woff2 https://i.forbesimg.com/assets/fonts/highlander/highlander-bold.woff2 — 31.0 KiB — 0 ms — font-display: swaphttps://i.forbesimg.com/assets/fonts/Graphik/Graphik-Semibold-Web.woff2Graphik-Semibold-Web.woff2 https://i.forbesimg.com/assets/fonts/Graphik/Graphik-Semibold-Web.woff2 — 34.1 KiB — 0 ms — font-display: swaphttps://i.forbesimg.com/assets/fonts/Graphik/Graphik-Medium-Web.woff2Graphik-Medium-Web.woff2 https://i.forbesimg.com/assets/fonts/Graphik/Graphik-Medium-Web.woff2 — 0 B — 0 ms — font-display: swaphttps://i.forbesimg.com/assets/fonts/Schnyder/Schnyder-SDemi-Web.woff2Schnyder-SDemi-Web.woff2 https://i.forbesimg.com/assets/fonts/Schnyder/Schnyder-SDemi-Web.woff2 — 0 B — 0 ms — font-display: swaphttps://i.forbesimg.com/assets/fonts/Graphik/Graphik-Regular-Web.woff2Graphik-Regular-Web.woff2 https://i.forbesimg.com/assets/fonts/Graphik/Graphik-Regular-Web.woff2 — 0 B — 0 ms — font-display: swaphttps://i.forbesimg.com/assets/fonts/highlander/highlander-bold.woff2highlander-bold.woff2 https://i.forbesimg.com/assets/fonts/highlander/highlander-bold.woff2 — 0 B — 0 ms — font-display: swaphttps://static.captcha-delivery.com/common/fonts/roboto/roboto.woff2roboto.woff2 https://static.captcha-delivery.com/common/fonts/roboto/roboto.woff2 — 15.8 KiB — 0 ms — font-display: swaphttps://contextual.media.net/__media__/fonts/OpenSans_Bold/OpenSans_Bold.woffOpenSans_Bold.woff https://contextual.media.net/__media__/fonts/OpenSans_Bold/OpenSans_Bold.woff — 25.1 KiB — 0 ms — font-display: swaphttps://contextual.media.net/__media__/fonts/OpenSans-Regular/OpenSans-Regular.woffOpenSans-Regular.woff https://contextual.media.net/__media__/fonts/OpenSans-Regular/OpenSans-Regular.woff — 66.0 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 0 B — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 0 B — 0 ms — font-display: swap
Schnyder-SDemi-Web.woff2 woff2 swap
Size 32 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Graphik-Regular-Web.woff2 woff2 swap
Size 30 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Highlander-Bold.woff2 woff2 swap
Size 45 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Graphik-Regular-Web.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Graphik-Medium-Web.woff2 woff2 swap
Size 36 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Schnyder-SDemi-Web.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
highlander-bold.woff2 woff2 swap
Size 31 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Graphik-Semibold-Web.woff2 woff2 swap
Size 34 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Graphik-Medium-Web.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Schnyder-SDemi-Web.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Graphik-Regular-Web.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
highlander-bold.woff2 woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
roboto.woff2 woff2 swap
Size 16 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
OpenSans_Bold.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
OpenSans-Regular.woff woff swap
Size 66 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
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 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)

Fixing the unchecked items could save ~27 KB and ~54 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
6 hints, 0 missing preconnects
PASS
6 hints, 0 missing preconnects
Info::
Page uses 6 resource hint(s)

Current Resource Hints

preconnect
2
preload
4
dns-prefetch
—
prefetch
—

6 resource hints configured

A
HTTP Caching
max-age=300 (5 minutes)
PASS
max-age=300 (5 minutes)
Info::
Cache-Control header is set
Got: public, max-age=300
Info::
Effective TTL: 5 minutes (max-age=300)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=300

DirectiveValueMeaning
public—Any cache may store this response
max-age300Cache for 5 minutes
Effective TTL: 300 seconds
Network Waterfall
392 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
85% of JavaScript execution is third-party
First-party Third-party 44357ms · 2315KB · €709/mo
i.forbesimg.com
Other
Costly
Execution 8922ms
Transfer 66 KB
Unused 36%
Monthly Cost €143/mo
www.gstatic.com
Other
Costly
Execution 6710ms
Transfer 0 KB
Unused 46%
Monthly Cost €107/mo
Unattributable
Other
Costly
Execution 4742ms
Transfer 0 KB
Monthly Cost €76/mo
jsconfig.adsafeprotected.com
Other
Costly
Execution 3516ms
Transfer 4 KB
Monthly Cost €56/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 2837ms
Transfer 182 KB
Unused 47%
Monthly Cost €45/mo
i.forbesimg.com
Other
Costly
Execution 2070ms
Transfer 74 KB
Unused 52%
Monthly Cost €33/mo
forbes.blueconic.net
Other
Costly
Execution 1561ms
Transfer 41 KB
Monthly Cost €25/mo
cdn.p-n.io
Other
Costly
Execution 1493ms
Transfer 45 KB
Monthly Cost €24/mo
cdn.ketchjs.com
Other
Costly
Execution 1490ms
Transfer 0 KB
Unused 60%
Monthly Cost €24/mo
cdn.doubleverify.com
Other
Costly
Execution 837ms
Transfer 0 KB
Unused 38%
Monthly Cost €13/mo
Google Tag Manager
Tag Manager
Costly
Execution 827ms
Transfer 148 KB
Unused 37%
Monthly Cost €13/mo
warp.media.net
Other
Costly
Execution 806ms
Transfer 221 KB
Unused 32%
Monthly Cost €13/mo
js.datadome.co
Other
Costly
Execution 769ms
Transfer 42 KB
Monthly Cost €12/mo
Google Tag Manager
Tag Manager
Costly
Execution 700ms
Transfer 154 KB
Unused 38%
Monthly Cost €11/mo
i.forbesimg.com
Other
Costly
Execution 663ms
Transfer 97 KB
Unused 50%
Monthly Cost €11/mo
pagead2.googlesyndication.com
Other
Costly
Execution 565ms
Transfer 0 KB
Unused 41%
Monthly Cost €9/mo
Google Tag Manager
Tag Manager
Costly
Execution 556ms
Transfer 145 KB
Unused 36%
Monthly Cost €9/mo
client.aps.amazon-adsystem.com
Other
Costly
Execution 501ms
Transfer 81 KB
Unused 43%
Monthly Cost €8/mo
Facebook Pixel
Advertising
Costly
Execution 389ms
Transfer 122 KB
Unused 30%
Monthly Cost €6/mo
static.adsafeprotected.com
Other
Costly
Execution 349ms
Transfer 0 KB
Monthly Cost €6/mo
pixel.adsafeprotected.com
Other
Costly
Execution 311ms
Transfer 92 KB
Unused 38%
Monthly Cost €5/mo
contextual.media.net
Other
Costly
Execution 299ms
Transfer 103 KB
Unused 48%
Monthly Cost €5/mo
pixel.adsafeprotected.com
Other
Costly
Execution 287ms
Transfer 92 KB
Unused 38%
Monthly Cost €5/mo
cdn.doubleverify.com
Other
Costly
Execution 252ms
Transfer 0 KB
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 225ms
Transfer 125 KB
Unused 57%
Monthly Cost €4/mo
siteintercept.qualtrics.com
Other
Costly
Execution 221ms
Transfer 36 KB
Unused 67%
Monthly Cost €4/mo
jsconfig.adsafeprotected.com
Other
Costly
Execution 212ms
Transfer 4 KB
Monthly Cost €3/mo
Facebook Pixel
Advertising
Costly
Execution 203ms
Transfer 95 KB
Unused 39%
Monthly Cost €3/mo
contextual.media.net
Other
Optional
Execution 178ms
Transfer 29 KB
Monthly Cost €3/mo
cdn.ketchjs.com
Other
Optional
Execution 175ms
Transfer 1 KB
Monthly Cost €3/mo
i.forbesimg.com
Other
Optional
Execution 138ms
Transfer 13 KB
Monthly Cost €2/mo
static.chartbeat.com
Other
Optional
Execution 131ms
Transfer 16 KB
Monthly Cost €2/mo
sb.scorecardresearch.com
Other
Optional
Execution 131ms
Transfer 0 KB
Monthly Cost €2/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 105ms
Transfer 0 KB
Unused 69%
Monthly Cost €2/mo
pub.doubleverify.com
Other
Optional
Execution 103ms
Transfer 31 KB
Monthly Cost €2/mo
d.email.forbes.com
Other
Optional
Execution 101ms
Transfer 29 KB
Monthly Cost €2/mo
Twitter/X Pixel
Advertising
Optional
Execution 97ms
Transfer 13 KB
Monthly Cost €2/mo
forbes.blueconic.net
Other
Optional
Execution 89ms
Transfer 31 KB
Monthly Cost €1/mo
i.forbesimg.com
Other
Optional
Execution 86ms
Transfer 38 KB
Monthly Cost €1/mo
static.criteo.net
Other
Optional
Execution 83ms
Transfer 15 KB
Monthly Cost €1/mo
tps.doubleverify.com
Other
Optional
Execution 80ms
Transfer 1 KB
Monthly Cost €1/mo
ml314.com
Other
Optional
Execution 73ms
Transfer 39 KB
Monthly Cost €1/mo
cdn.adsafeprotected.com
Other
Optional
Execution 72ms
Transfer 7 KB
Monthly Cost €1/mo
www.redditstatic.com
Other
Optional
Execution 65ms
Transfer 19 KB
Monthly Cost €1/mo
tps.doubleverify.com
Other
Optional
Execution 64ms
Transfer 1 KB
Monthly Cost €1/mo
ep2.adtrafficquality.google
Other
Optional
Execution 59ms
Transfer 8 KB
Monthly Cost €1/mo
cdn.id5-sync.com
Other
Optional
Execution 58ms
Transfer 35 KB
Unused 89%
Monthly Cost €1/mo
ml314.com
Other
Optional
Execution 52ms
Transfer 1 KB
Monthly Cost €1/mo
oa.openxcdn.net
Other
Optional
Execution 52ms
Transfer 8 KB
Monthly Cost €1/mo
secure.quantserve.com
Other
Optional
Execution 51ms
Transfer 12 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • i.forbesimg.com adds 8922ms and costs ~€143/month
  • www.gstatic.com adds 6710ms and costs ~€107/month
  • Unattributable adds 4742ms and costs ~€76/month
  • jsconfig.adsafeprotected.com adds 3516ms and costs ~€56/month
  • securepubads.g.doubleclick.net adds 2837ms and costs ~€45/month
  • i.forbesimg.com adds 2070ms and costs ~€33/month
  • forbes.blueconic.net adds 1561ms and costs ~€25/month
  • cdn.p-n.io adds 1493ms and costs ~€24/month
  • cdn.ketchjs.com adds 1490ms and costs ~€24/month
  • cdn.doubleverify.com adds 837ms and costs ~€13/month
  • Google Tag Manager adds 827ms and costs ~€13/month
  • warp.media.net adds 806ms and costs ~€13/month
  • js.datadome.co adds 769ms and costs ~€12/month
  • Google Tag Manager adds 700ms and costs ~€11/month
  • i.forbesimg.com adds 663ms and costs ~€11/month
  • pagead2.googlesyndication.com adds 565ms and costs ~€9/month
  • Google Tag Manager adds 556ms and costs ~€9/month
  • client.aps.amazon-adsystem.com adds 501ms and costs ~€8/month
  • Facebook Pixel adds 389ms and costs ~€6/month
  • static.adsafeprotected.com adds 349ms and costs ~€6/month
  • pixel.adsafeprotected.com adds 311ms and costs ~€5/month
  • contextual.media.net adds 299ms and costs ~€5/month
  • pixel.adsafeprotected.com adds 287ms and costs ~€5/month
  • cdn.doubleverify.com adds 252ms and costs ~€4/month
  • Google Tag Manager adds 225ms and costs ~€4/month
  • siteintercept.qualtrics.com adds 221ms and costs ~€4/month
  • jsconfig.adsafeprotected.com adds 212ms and costs ~€3/month
  • Facebook Pixel adds 203ms and costs ~€3/month

85% 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

i.forbesimg.com takes 8922ms 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.gstatic.com takes 6710ms 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 4742ms 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 3516ms 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 2837ms 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

i.forbesimg.com takes 2070ms 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 i.forbesimg.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

forbes.blueconic.net takes 1561ms 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.p-n.io takes 1493ms 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 1490ms 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 cdn.ketchjs.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.doubleverify.com takes 837ms 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 827ms 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

warp.media.net takes 806ms 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

js.datadome.co takes 769ms 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 700ms 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

i.forbesimg.com takes 663ms 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

50% of i.forbesimg.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

pagead2.googlesyndication.com takes 565ms 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 556ms 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

client.aps.amazon-adsystem.com takes 501ms 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

Facebook Pixel takes 389ms 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 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

pixel.adsafeprotected.com takes 311ms 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

contextual.media.net takes 299ms 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

pixel.adsafeprotected.com takes 287ms 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.doubleverify.com takes 252ms 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 225ms 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 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

siteintercept.qualtrics.com takes 221ms 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

67% 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

jsconfig.adsafeprotected.com takes 212ms 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

Facebook Pixel takes 203ms 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

69% of securepubads.g.doubleclick.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

89% of cdn.id5-sync.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

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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