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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
4
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
90
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.

1.05 s

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

1.40 s

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

117 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.

1.83 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.

4.08 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
14
5 PASS 3 REVIEW 4 FIX
F
Page Weight Budget
Action
5.7 MB transferred, 147 requests
FIX
5.7 MB transferred, 147 requests
Critical::
Page weighs 15.4 MB (5.7 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::
147 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
5.7 MB / 2.4 MB budget
5.7 MB transferred
147 requests
1.2 g CO2 per page load
JavaScript 3.0 MiB 52%
CSS 1.7 MiB 30%
Images 454.2 KiB 8%
HTML 448.9 KiB 8%
Fonts 117.9 KiB 2%
Other 38.8 KiB 1%
Other 19.8 KiB 0%
Other 8.0 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 (5.4 MiB of 5.7 MiB)
Info::
Third-party blocking time is low (0 ms)
94%
First-party Third-party
F
JS Bundles
Action
66 scripts, 1001 KB unused
FIX
66 scripts, 1001 KB 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: 1001 KB
1001 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.js142 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 KB66 KB (58%)✓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 KB62 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-XTF601BSRK&cx=c&gtm=4e6460144 KB58 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WWBWRXL141 KB46 KB (32%)✓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
28 images, 0 KB saveable
REVIEW
28 images, 0 KB saveable
Info::
All images are well-optimized
28 images 454 KB
0 oversized -0 KB
11 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1726ms total JS execution
REVIEW
1726ms total JS execution
Warning::
Unattributable: 436ms CPU time
Warning::
https://www.tomshardware.com/: 416ms CPU time
Info::
https://www.tomshardware.com/vite/assets/vendor-DH...: 158ms CPU time
Info::
https://cdn.privacy-mgmt.com/unified/wrapperMessag...: 133ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-WHL...: 112ms CPU time
Warning::
Third-party scripts: 1152ms (67% of total)

Main Thread Breakdown

Script Evaluation 56% Other 15% Style & Layout 14% Script Parsing & Compilation 8% Garbage Collection 4%
ScriptTotalScriptingParse/CompileParty
Unattributable436ms121ms0ms3rd
https://www.tomshardware.com/416ms61ms21ms1st
https://www.tomshardware.com/vite/assets/vendor-DH-HcC7C.js158ms143ms0ms1st
https://cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js133ms103ms3ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WHLXGS3C&gtm=4e6460112ms101ms10ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WWBWRXL108ms88ms10ms3rd
https://bordeaux.futurecdn.net/bordeaux.js100ms71ms14ms3rd
https://js.chargebee.com/v2/chargebee.js83ms59ms24ms3rd
https://hawk.tomshardware.com/js/w/es6/master-7d018138/responsive.js67ms52ms14ms3rd
https://www.googletagmanager.com/gtag/js?id=G-HKK8NZEZYV&cx=c&gtm=4e646062ms50ms9ms3rd

Showing top 10 of 11 scripts

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
6 fonts (118 KB)
PASS
6 fonts (118 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

118 KB total

Render-blocking

0

of 6

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 1.1 s LCP 1.4 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: swaphttps://vanilla.futurecdn.net/tomshardware/1597534/media/fonts/tomshardware.wofftomshardware.woff https://vanilla.futurecdn.net/tomshardware/1597534/media/fonts/tomshardware.woff — 7.5 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
tomshardware.woff woff swap
Size 7 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
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)

Fixing the unchecked items could save ~2 KB and ~4 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
147 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
67% of JavaScript execution is third-party
First-party Third-party 1152ms · 1208KB · €12/mo
Unattributable
Other
Costly
Execution 436ms
Transfer 0 KB
Monthly Cost €5/mo
cdn.privacy-mgmt.com
Other
Optional
Execution 133ms
Transfer 42 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 112ms
Transfer 165 KB
Unused 42%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 108ms
Transfer 141 KB
Unused 32%
Monthly Cost €1/mo
bordeaux.futurecdn.net
Other
Optional
Execution 100ms
Transfer 159 KB
Unused 57%
Monthly Cost €1/mo
js.chargebee.com
Other
Optional
Execution 83ms
Transfer 281 KB
Unused 73%
Monthly Cost €1/mo
hawk.tomshardware.com
Other
Optional
Execution 67ms
Transfer 142 KB
Unused 51%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 62ms
Transfer 153 KB
Unused 40%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 51ms
Transfer 125 KB
Unused 50%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 436ms and costs ~€5/month

67% of JavaScript execution time comes from third-party scripts.

Why this matters

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

Learn more ▾

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

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 436ms 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

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

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

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

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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