Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
4.54 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
26.17 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.54 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
1.705
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.44 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.
37.35 s
Page Load Progression
FPage Weight BudgetAction5.5 MB transferred, 136 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
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.
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.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction8308ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 1950ms | 706ms | 0ms | 3rd |
| https://www.tomshardware.com/ | 1515ms | 314ms | 103ms | 3rd |
| https://www.tomshardware.com/vite/assets/vendor-DH-HcC7C.js | 649ms | 625ms | 1ms | 3rd |
| https://cdn.privacy-mgmt.com/unified/4.40.1/usnat-uspapi.090eccada574d39af6f8.bundle.js | 522ms | 409ms | 37ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WHLXGS3C>m=4e64e1 | 421ms | 381ms | 35ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WWBWRXL | 387ms | 319ms | 39ms | 3rd |
| https://js.chargebee.com/v2/chargebee.js | 365ms | 280ms | 84ms | 3rd |
| https://hawk.tomshardware.com/js/w/es6/master-c775ccf2/responsive.js | 293ms | 241ms | 43ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MZM3ZZL | 246ms | 210ms | 27ms | 3rd |
| https://bordeaux.futurecdn.net/bordeaux.js | 199ms | 139ms | 46ms | 3rd |
Showing top 10 of 23 scripts
FJS BundlesAction64 scripts, 1.0 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://js.chargebee.com/v2/chargebee.js | 282 KB | 205 KB (73%) | ✓ | 3rd |
| https://bordeaux.futurecdn.net/bordeaux.js | 159 KB | 90 KB (57%) | ✓ | 3rd |
| https://hawk.tomshardware.com/js/w/es6/responsive.js | 143 KB | 87 KB (62%) | ✓ | 3rd |
| https://vanilla.futurecdn.net/tomshardware/1603762/media/shared/js/bundle.connect.js | 139 KB | 85 KB (62%) | ✓ | 3rd |
| https://hawk.tomshardware.com/js/w/es6/master-c775ccf2/responsive.js | 142 KB | 72 KB (51%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WHLXGS3C>m=4e64e1 | 166 KB | 70 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KR9BFFCD>m=4e64e1 | 113 KB | 67 KB (59%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-HKK8NZEZYV&cx=c>m=4e64e1 | 153 KB | 63 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MZM3ZZL | 126 KB | 62 KB (49%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-XTF601BSRK&cx=c>m=4e64e1 | 145 KB | 60 KB (41%) | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction136 resources · 5.5 MB · 1.0 MB savings availableFIX
~1.0 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 136 resources | 5.5 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
no-store,private
| Directive | Value | Meaning |
|---|---|---|
| no-store | — | Never cache this response |
| private | — | Only browser cache, not CDN/proxy |
BImage Optimization20 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading5 fonts (110 KB)PASS
Web fonts
5
110 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints18 hints, 0 missing preconnectsPASS
Current Resource Hints
18 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall136 requests over 31366msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 1950ms | 0 KB | — | €21/mo | Costly |
www.tomshardware.com www.tomshardware.com | Other | 1515ms | 270 KB | — | €16/mo | Costly |
www.tomshardware.com www.tomshardware.com | Other | 649ms | 41 KB | 55% | €7/mo | Costly |
cdn.privacy-mgmt.com cdn.privacy-mgmt.com | Other | 522ms | 35 KB | — | €6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 421ms | 166 KB | 42% | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 387ms | 143 KB | 33% | €4/mo | Costly |
js.chargebee.com js.chargebee.com | Other | 365ms | 282 KB | 73% | €4/mo | Costly |
hawk.tomshardware.com hawk.tomshardware.com | Other | 293ms | 142 KB | 51% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 246ms | 126 KB | 49% | €3/mo | Costly |
bordeaux.futurecdn.net bordeaux.futurecdn.net | Other | 199ms | 159 KB | 57% | €2/mo | Optional |
vanilla.futurecdn.net vanilla.futurecdn.net | Other | 197ms | 105 KB | 42% | €2/mo | Optional |
vanilla.futurecdn.net vanilla.futurecdn.net | Other | 195ms | 139 KB | 62% | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 195ms | 153 KB | 41% | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 193ms | 145 KB | 41% | €2/mo | Optional |
sdk.mrf.io sdk.mrf.io | Other | 164ms | 64 KB | 35% | €2/mo | Optional |
sb.scorecardresearch.com sb.scorecardresearch.com | Other | 136ms | 0 KB | — | €1/mo | Optional |
bot.tomshardware.com bot.tomshardware.com | Other | 136ms | 53 KB | — | €1/mo | Optional |
cdn.privacy-mgmt.com cdn.privacy-mgmt.com | Other | 126ms | 42 KB | — | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 118ms | 113 KB | 59% | €1/mo | Optional |
freyr.futurecdn.net freyr.futurecdn.net | Other | 97ms | 22 KB | — | €1/mo | Optional |
bot.tomshardware.com bot.tomshardware.com | Other | 88ms | 5 KB | — | €1/mo | Optional |
slice.vanilla.futurecdn.net slice.vanilla.futurecdn.net | Other | 62ms | 39 KB | — | €1/mo | Optional |
cdn.privacy-mgmt.com cdn.privacy-mgmt.com | Other | 56ms | 25 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 1950ms and costs ~€21/month
- www.tomshardware.com adds 1515ms and costs ~€16/month
- www.tomshardware.com adds 649ms and costs ~€7/month
- cdn.privacy-mgmt.com adds 522ms and costs ~€6/month
- Google Tag Manager adds 421ms and costs ~€5/month
- Google Tag Manager adds 387ms and costs ~€4/month
- js.chargebee.com adds 365ms and costs ~€4/month
- hawk.tomshardware.com adds 293ms and costs ~€3/month
- Google Tag Manager adds 246ms and costs ~€3/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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 1950ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.tomshardware.com takes 1515ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.tomshardware.com takes 649ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
55% of www.tomshardware.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
cdn.privacy-mgmt.com takes 522ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 421ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 387ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
js.chargebee.com takes 365ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
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.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
hawk.tomshardware.com takes 293ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
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.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Google Tag Manager takes 246ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
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.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
62% of vanilla.futurecdn.net's code is unused. The script may be loading features you don't use.
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.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev