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Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
5
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
3
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
84
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

13.00 s

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

25.28 s

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

2.34 s

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

0.687

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

13.00 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.

35.63 s

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
16
7 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
5.5 MB transferred, 137 requests
FIX
5.5 MB transferred, 137 requests
Critical::
Page weighs 15.1 MB (5.5 MB transferred)
Warning::
JavaScript is 3.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.0 MB
Info::
CSS is 1.7 MB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 1.7 MB
Warning::
137 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.2 g CO2 per page load
5.5 MB / 2.4 MB budget
5.5 MB transferred
137 requests
1.2 g CO2 per page load
JavaScript 3.0 MiB 54%
CSS 1.7 MiB 30%
HTML 448.9 KiB 8%
Images 282.1 KiB 5%
Fonts 110.4 KiB 2%
Other 39.2 KiB 1%
Other 19.8 KiB 0%
Other 7.7 KiB 0%
Other 552 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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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
94% third-party, 0 ms blocking
FIX
94% third-party, 0 ms blocking
Warning::
Third-party code accounts for 94% of page weight (5.2 MiB of 5.5 MiB)
Info::
Third-party blocking time is low (0 ms)
94%
First-party Third-party
F
JS Execution Cost
Action
8641ms total JS execution
FIX
8641ms total JS execution
Warning::
Unattributable: 2094ms CPU time
Warning::
https://www.tomshardware.com/: 1355ms CPU time
Warning::
https://www.tomshardware.com/vite/assets/vendor-DH...: 736ms CPU time
Warning::
https://cdn.privacy-mgmt.com/unified/4.40.1/usnat-...: 526ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WWB...: 460ms CPU time
Warning::
Third-party scripts: 6491ms (75% of total)

Main Thread Breakdown

Script Evaluation 59% Other 15% Style & Layout 10% Script Parsing & Compilation 9% Garbage Collection 4%
ScriptTotalScriptingParse/CompileParty
Unattributable2094ms759ms0ms3rd
https://www.tomshardware.com/1355ms260ms81ms1st
https://www.tomshardware.com/vite/assets/vendor-DH-HcC7C.js736ms706ms1ms1st
https://cdn.privacy-mgmt.com/unified/4.40.1/usnat-uspapi.090eccada574d39af6f8.bundle.js526ms408ms32ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WWBWRXL460ms361ms56ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WHLXGS3C&gtm=4e6460454ms388ms42ms3rd
https://js.chargebee.com/v2/chargebee.js397ms288ms107ms3rd
https://www.googletagmanager.com/gtag/js?id=G-HKK8NZEZYV&cx=c&gtm=4e6460297ms236ms49ms3rd
https://hawk.tomshardware.com/js/w/es6/master-7d018138/responsive.js285ms234ms45ms3rd
https://bordeaux.futurecdn.net/bordeaux.js270ms192ms74ms3rd

Showing top 10 of 23 scripts

F
JS Bundles
Action
65 scripts, 1.0 MB unused
FIX
65 scripts, 1.0 MB unused
Warning::
https://js.chargebee.com/v2/chargebee.js: 205 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://bordeaux.futurecdn.net/bordeaux.js: 90 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://hawk.tomshardware.com/js/w/es6/responsive....: 87 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://vanilla.futurecdn.net/tomshardware/1597534...: 85 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WHL...: 69 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.0 MB
1030 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://js.chargebee.com/v2/chargebee.js281 KB205 KB (73%)✓3rd
https://bordeaux.futurecdn.net/bordeaux.js159 KB90 KB (57%)✓3rd
https://hawk.tomshardware.com/js/w/es6/responsive.js143 KB87 KB (62%)✓3rd
https://vanilla.futurecdn.net/tomshardware/1597534/media/shared/js/bundle.connect.js139 KB85 KB (62%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WHLXGS3C&gtm=4e6460165 KB69 KB (42%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KR9BFFCD&gtm=4e6460113 KB67 KB (59%)✓3rd
https://hawk.tomshardware.com/js/w/es6/master-7d018138/responsive.js142 KB64 KB (51%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MZM3ZZL125 KB63 KB (50%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-HKK8NZEZYV&cx=c&gtm=4e6460153 KB61 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-XTF601BSRK&cx=c&gtm=4e6460144 KB60 KB (41%)✓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: no-store,private
Info::
Last-Modified header present
Cache-Control

no-store,private

DirectiveValueMeaning
no-store—Never cache this response
private—Only browser cache, not CDN/proxy
B
Image Optimization
21 images, 0 KB saveable
REVIEW
21 images, 0 KB saveable
Info::
All images are well-optimized
21 images 282 KB
0 oversized -0 KB
10 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 (110 KB)
PASS
5 fonts (110 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

110 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 24.0 s 26.0 s FCP 13.0 s LCP 25.3 shttps://vanilla.futurecdn.net/tomshardware/1597534/media/shared/fonts/OpenSans-400-Regular.woff2OpenSans-400-Regular.woff2 https://vanilla.futurecdn.net/tomshardware/1597534/media/shared/fonts/OpenSans-400-Regular.woff2 — 20.6 KiB — 0 ms — font-display: swaphttps://vanilla.futurecdn.net/tomshardware/1597534/media/shared/fonts/OpenSans-600-SemiBold.woff2OpenSans-600-SemiBold.w... https://vanilla.futurecdn.net/tomshardware/1597534/media/shared/fonts/OpenSans-600-SemiBold.woff2 — 20.7 KiB — 0 ms — font-display: swaphttps://vanilla.futurecdn.net/tomshardware/1597534/media/shared/fonts/OpenSans-700-Bold.woff2OpenSans-700-Bold.woff2 https://vanilla.futurecdn.net/tomshardware/1597534/media/shared/fonts/OpenSans-700-Bold.woff2 — 20.2 KiB — 0 ms — font-display: swapdata:font/woff2;base64,d09GMgABAAAAAGCIABIAAAAAyNwAAGAdAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoF6G5pSHIhi…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAAGCIABIAAAAAyNwAAGAdAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoF6G5pSHIhi… — 24.1 KiB — 0 ms — font-display: swapdata:font/woff2;base64,d09GMgABAAAAAGNwABIAAAAAyVAAAGMFAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoF6G5wGHIhi…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAAGNwABIAAAAAyVAAAGMFAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoF6G5wGHIhi… — 24.9 KiB — 0 ms — font-display: swap
OpenSans-400-Regular.woff2 woff2 swap
Size 21 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
OpenSans-600-SemiBold.w... woff2 swap
Size 21 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
OpenSans-700-Bold.woff2 woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
woff2;base64,d09GMgABAA... woff2 swap
Size 24 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
woff2;base64,d09GMgABAA... woff2 swap
Size 25 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)
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
18 hints, 0 missing preconnects
PASS
18 hints, 0 missing preconnects
Info::
Page uses 18 resource hint(s)

Current Resource Hints

preconnect
4
preload
3
dns-prefetch
+1
11
prefetch
—

18 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
Network Waterfall
137 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
75% of JavaScript execution is third-party
First-party Third-party 6491ms · 3585KB · €70/mo
Unattributable
Other
Costly
Execution 2094ms
Transfer 0 KB
Monthly Cost €23/mo
cdn.privacy-mgmt.com
Other
Costly
Execution 526ms
Transfer 42 KB
Unused 51%
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 460ms
Transfer 141 KB
Unused 34%
Monthly Cost €5/mo
Google Tag Manager
Tag Manager
Costly
Execution 454ms
Transfer 165 KB
Unused 42%
Monthly Cost €5/mo
js.chargebee.com
Other
Costly
Execution 397ms
Transfer 281 KB
Unused 73%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 297ms
Transfer 153 KB
Unused 40%
Monthly Cost €3/mo
hawk.tomshardware.com
Other
Costly
Execution 285ms
Transfer 142 KB
Unused 51%
Monthly Cost €3/mo
bordeaux.futurecdn.net
Other
Costly
Execution 270ms
Transfer 159 KB
Unused 57%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 218ms
Transfer 125 KB
Unused 50%
Monthly Cost €2/mo
vanilla.futurecdn.net
Other
Costly
Execution 201ms
Transfer 105 KB
Unused 42%
Monthly Cost €2/mo
vanilla.futurecdn.net
Other
Optional
Execution 196ms
Transfer 139 KB
Unused 62%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 196ms
Transfer 144 KB
Unused 41%
Monthly Cost €2/mo
bot.tomshardware.com
Other
Optional
Execution 143ms
Transfer 53 KB
Monthly Cost €2/mo
cdn.privacy-mgmt.com
Other
Optional
Execution 139ms
Transfer 42 KB
Monthly Cost €2/mo
sdk.mrf.io
Other
Optional
Execution 136ms
Transfer 64 KB
Unused 36%
Monthly Cost €1/mo
sb.scorecardresearch.com
Other
Optional
Execution 127ms
Transfer 0 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 114ms
Transfer 113 KB
Unused 59%
Monthly Cost €1/mo
freyr.futurecdn.net
Other
Optional
Execution 88ms
Transfer 21 KB
Monthly Cost €1/mo
slice.vanilla.futurecdn.net
Other
Optional
Execution 79ms
Transfer 39 KB
Monthly Cost €1/mo
bot.tomshardware.com
Other
Optional
Execution 71ms
Transfer 1657 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 2094ms and costs ~€23/month
  • cdn.privacy-mgmt.com adds 526ms and costs ~€6/month
  • Google Tag Manager adds 460ms and costs ~€5/month
  • Google Tag Manager adds 454ms and costs ~€5/month
  • js.chargebee.com adds 397ms and costs ~€4/month
  • Google Tag Manager adds 297ms and costs ~€3/month
  • hawk.tomshardware.com adds 285ms and costs ~€3/month
  • bordeaux.futurecdn.net adds 270ms and costs ~€3/month
  • Google Tag Manager adds 218ms and costs ~€2/month
  • vanilla.futurecdn.net adds 201ms and costs ~€2/month

75% 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

Unattributable takes 2094ms 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.privacy-mgmt.com takes 526ms 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

51% of cdn.privacy-mgmt.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 460ms 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 454ms 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.chargebee.com takes 397ms 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

73% of js.chargebee.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 297ms 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

hawk.tomshardware.com takes 285ms 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

51% of hawk.tomshardware.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

bordeaux.futurecdn.net takes 270ms 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 bordeaux.futurecdn.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

Google Tag Manager takes 218ms 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 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

vanilla.futurecdn.net 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 vanilla.futurecdn.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

59% 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

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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