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.
9.42 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
14.83 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
4.13 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.
12.37 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.
34.13 s
Page Load Progression
FPage Weight BudgetAction7.2 MB transferred, 153 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
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
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.
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.
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 CostAction11783ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.cnet.com/a/neutron/eb626a70ccf6.modern.js | 3300ms | 3030ms | 28ms | 3rd |
| https://www.cnet.com/ | 1396ms | 96ms | 248ms | 3rd |
| Unattributable | 1181ms | 135ms | 0ms | 3rd |
| https://cdn.ziffstatic.com/jst/otTCF.202512.1.0.js | 598ms | 522ms | 5ms | 3rd |
| https://www.cnet.com/a/neutron/6518b13b9504.modern.js | 512ms | 439ms | 4ms | 3rd |
| https://client.aps.amazon-adsystem.com/publisher.js | 410ms | 372ms | 32ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604100101/pubads_impl.js | 401ms | 342ms | 45ms | 3rd |
| https://www.cnet.com/a/neutron/47d696a75771.modern.js | 396ms | 262ms | 5ms | 3rd |
| https://cdn.ziffstatic.com/jst/otBannerSdk.202512.1.0.js | 391ms | 287ms | 41ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=G-R820W8QX02&cx=c>m=4e64e1 | 357ms | 308ms | 47ms | 3rd |
Showing top 10 of 28 scripts
FJS BundlesAction60 scripts, 1.2 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.ziffstatic.com/pg/cnet.prebid.js | 232 KB | 188 KB (81%) | ✓ | 3rd |
| https://www.cnet.com/a/neutron/47d696a75771.modern.js | 381 KB | 180 KB (48%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604100101/pubads_impl.js | 186 KB | 127 KB (68%) | ✓ | 3rd |
| https://cdn.confiant-integrations.net/gptprebidnative/202603241056/wrap.js | 142 KB | 85 KB (60%) | ✓ | 3rd |
| https://www.cnet.com/a/neutron/a922d2a89ddd.modern.js | 224 KB | 72 KB (32%) | ✓ | 3rd |
| https://cdn.ziffstatic.com/jst/otBannerSdk.202512.1.0.js | 126 KB | 72 KB (57%) | ✓ | 3rd |
| https://forms.cnet.com/w37htfhcq2/vendor/474a4045-633c-42d5-8a01-35be527d3b9a/main.js?cb=8DCB3ECB413095BC01D1B29BF4757228 | 116 KB | 69 KB (59%) | ✓ | 3rd |
| https://cdn.ziffstatic.com/pg/cnet.js | 86 KB | 68 KB (79%) | ✓ | 3rd |
| https://openads-cdn.adsrvr.org/openadsjs/build/v1.0/ziffdavis/openads.js | 98 KB | 67 KB (69%) | ✓ | 3rd |
| https://www.cnet.com/a/neutron/3d1897abd40d.modern.js | 83 KB | 63 KB (75%) | ✓ | 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 InventoryAction153 resources · 7.2 MB · 1.2 MB savings availableFIX
~1.2 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 153 resources | 7.2 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization40 images, 0 KB saveableREVIEW
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (426 KB)PASS
Web fonts
2
426 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~189 KB and ~378 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints11 hints, 0 missing preconnectsPASS
Current Resource Hints
11 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Google Cloud
Network Waterfall153 requests over 4694msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.cnet.com www.cnet.com | Other | 3300ms | 106 KB | 45% | €53/mo | Costly |
www.cnet.com www.cnet.com | Other | 1396ms | 429 KB | — | €22/mo | Costly |
Unattributable Unattributable | Other | 1181ms | 0 KB | — | €19/mo | Costly |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 598ms | 18 KB | — | €10/mo | Costly |
www.cnet.com www.cnet.com | Other | 512ms | 12 KB | — | €8/mo | Costly |
client.aps.amazon-adsystem.com client.aps.amazon-adsystem.com | Other | 410ms | 91 KB | 55% | €7/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 401ms | 186 KB | 68% | €6/mo | Costly |
www.cnet.com www.cnet.com | Other | 396ms | 381 KB | 48% | €6/mo | Costly |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 391ms | 126 KB | 57% | €6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 357ms | 161 KB | 39% | €6/mo | Costly |
www.cnet.com www.cnet.com | Other | 334ms | 9 KB | — | €5/mo | Costly |
cdn.confiant-integrations.net cdn.confiant-integrations.net | Other | 319ms | 142 KB | 60% | €5/mo | Costly |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 217ms | 86 KB | 79% | €3/mo | Costly |
www.cnet.com www.cnet.com | Other | 191ms | 1 KB | — | €3/mo | Optional |
fundingchoicesmessages.google.com fundingchoicesmessages.google.com | Other | 191ms | 70 KB | 50% | €3/mo | Optional |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 186ms | 232 KB | 81% | €3/mo | Optional |
forms.cnet.com forms.cnet.com | Other | 185ms | 116 KB | 59% | €3/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 179ms | 116 KB | 53% | €3/mo | Optional |
openads-cdn.adsrvr.org openads-cdn.adsrvr.org | Other | 159ms | 98 KB | 69% | €3/mo | Optional |
www.cnet.com www.cnet.com | Other | 143ms | 8 KB | — | €2/mo | Optional |
forms.cnet.com forms.cnet.com | Other | 140ms | 1 KB | — | €2/mo | Optional |
cdn.confiant-integrations.net cdn.confiant-integrations.net | Other | 101ms | 58 KB | — | €2/mo | Optional |
frugalfiestas.com frugalfiestas.com | Other | 101ms | 37 KB | — | €2/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 100ms | 34 KB | — | €2/mo | Optional |
pub.doubleverify.com pub.doubleverify.com | Other | 86ms | 31 KB | — | €1/mo | Optional |
www.cnet.com www.cnet.com | Other | 84ms | 5 KB | — | €1/mo | Optional |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 72ms | 0 KB | — | €1/mo | Optional |
static.chartbeat.com static.chartbeat.com | Other | 53ms | 16 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.cnet.com adds 3300ms and costs ~€53/month
- www.cnet.com adds 1396ms and costs ~€22/month
- Unattributable adds 1181ms and costs ~€19/month
- cdn.ziffstatic.com adds 598ms and costs ~€10/month
- www.cnet.com adds 512ms and costs ~€8/month
- client.aps.amazon-adsystem.com adds 410ms and costs ~€7/month
- securepubads.g.doubleclick.net adds 401ms and costs ~€6/month
- www.cnet.com adds 396ms and costs ~€6/month
- cdn.ziffstatic.com adds 391ms and costs ~€6/month
- Google Tag Manager adds 357ms and costs ~€6/month
- www.cnet.com adds 334ms and costs ~€5/month
- cdn.confiant-integrations.net adds 319ms and costs ~€5/month
- cdn.ziffstatic.com adds 217ms 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
www.cnet.com takes 3300ms 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.cnet.com takes 1396ms 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
Unattributable takes 1181ms 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
cdn.ziffstatic.com takes 598ms 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.cnet.com takes 512ms 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
client.aps.amazon-adsystem.com takes 410ms 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 client.aps.amazon-adsystem.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
securepubads.g.doubleclick.net takes 401ms 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
68% of securepubads.g.doubleclick.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
www.cnet.com takes 396ms 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
cdn.ziffstatic.com takes 391ms 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 cdn.ziffstatic.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 357ms 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.cnet.com takes 334ms 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
cdn.confiant-integrations.net takes 319ms 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
60% of cdn.confiant-integrations.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
cdn.ziffstatic.com takes 217ms 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
79% of cdn.ziffstatic.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
81% of cdn.ziffstatic.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
59% of forms.cnet.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
53% 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
69% of openads-cdn.adsrvr.org'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