Performance
· 15 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.
1.11 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.42 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
164 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.
1.82 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.
5.00 s
Page Load Progression
FPage Weight BudgetAction5.7 MB transferred, 143 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 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 | 143 KB | 72 KB (51%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WHLXGS3C>m=4e64e1h1&bs=ctrl | 166 KB | 69 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KR9BFFCD>m=4e64e1h1&bs=ctrl | 113 KB | 67 KB (59%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-HKK8NZEZYV&cx=c>m=4e64f0h2 | 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=4e64e1h1&bs=ctrl | 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 InventoryAction143 resources · 5.7 MB · 1.0 MB savings availableFIX
~1.0 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 143 resources | 5.7 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 Optimization27 images, 0 KB saveableREVIEW
CJS Execution CostAction1736ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 447ms | 166ms | 0ms | 3rd |
| https://www.tomshardware.com/ | 388ms | 103ms | 22ms | 3rd |
| https://www.tomshardware.com/vite/assets/vendor-DH-HcC7C.js | 152ms | 141ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WHLXGS3C>m=4e64e1h1&bs=ctrl | 137ms | 120ms | 9ms | 3rd |
| https://cdn.privacy-mgmt.com/unified/4.40.1/usnat-uspapi.090eccada574d39af6f8.bundle.js | 136ms | 104ms | 8ms | 3rd |
| https://js.chargebee.com/v2/chargebee.js | 92ms | 69ms | 23ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WWBWRXL | 80ms | 69ms | 10ms | 3rd |
| https://hawk.tomshardware.com/js/w/es6/master-c775ccf2/responsive.js | 70ms | 58ms | 11ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MZM3ZZL | 65ms | 50ms | 7ms | 3rd |
| https://bordeaux.futurecdn.net/bordeaux.js | 60ms | 45ms | 13ms | 3rd |
Showing top 10 of 12 scripts
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 Loading6 fonts (118 KB)PASS
Web fonts
6
118 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~2 KB and ~4 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall143 requests over 31593msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 447ms | 0 KB | — | €5/mo | Costly |
www.tomshardware.com www.tomshardware.com | Other | 388ms | 270 KB | — | €4/mo | Costly |
www.tomshardware.com www.tomshardware.com | Other | 152ms | 41 KB | 56% | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 137ms | 166 KB | 42% | €1/mo | Optional |
cdn.privacy-mgmt.com cdn.privacy-mgmt.com | Other | 136ms | 35 KB | — | €1/mo | Optional |
js.chargebee.com js.chargebee.com | Other | 92ms | 282 KB | 73% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 80ms | 143 KB | 32% | €1/mo | Optional |
hawk.tomshardware.com hawk.tomshardware.com | Other | 70ms | 143 KB | 51% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 65ms | 126 KB | 49% | €1/mo | Optional |
bordeaux.futurecdn.net bordeaux.futurecdn.net | Other | 60ms | 159 KB | 57% | €1/mo | Optional |
vanilla.futurecdn.net vanilla.futurecdn.net | Other | 54ms | 105 KB | 42% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 52ms | 153 KB | 41% | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 447ms and costs ~€5/month
- www.tomshardware.com adds 388ms and costs ~€4/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 447ms 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 388ms 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
56% 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
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
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
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