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.
1.12 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.96 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
478 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.
2.77 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.
7.62 s
Page Load Progression
FPage Weight BudgetAction9.7 MB transferred, 176 requestsFIX
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
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
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
FJS Execution CostAction4446ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 784ms | 131ms | 0ms | 3rd |
| https://lifehacker.com/ | 466ms | 47ms | 4ms | 1st |
| https://static-cdn.spot.im/production/social/tags/v5.26.0/launcher/691-bundle.js | 422ms | 376ms | 21ms | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 365ms | 319ms | 38ms | 3rd |
| https://cdn.ziffstatic.com/jst/otTCF.202512.1.0.js | 351ms | 315ms | 5ms | 3rd |
| https://static-cdn.spot.im/production/social/tags/v5.26.0/launcher/entry-bundle.js | 199ms | 191ms | 3ms | 3rd |
| https://cdn.ziffstatic.com/jst/otBannerSdk.202512.1.0.js | 183ms | 140ms | 22ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-7E851STSQZ | 180ms | 143ms | 28ms | 3rd |
| https://static-cdn.spot.im/production/social/tags/v5.26.0/launcher/696-bundle.js | 179ms | 47ms | 1ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 163ms | 133ms | 26ms | 3rd |
Showing top 10 of 23 scripts
FJS BundlesAction79 scripts, 1.8 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.ziffstatic.com/pg/lifehacker.prebid.js | 232 KB | 188 KB (81%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 188 KB | 126 KB (67%) | ✓ | 3rd |
| https://assets.bounceexchange.com/assets/smart-tag/versioned/main-v2_567848e754a175dbe621932e8f6a1b7e.br.js | 116 KB | 88 KB (76%) | ✓ | 3rd |
| https://cdn.ziffstatic.com/jst/otBannerSdk.202512.1.0.js | 126 KB | 72 KB (57%) | ✓ | 3rd |
| https://forms.lifehacker.com/w37htfhcq2/vendor/d0e1d3d8-b896-4fe6-911a-2d9fc7c5cc2a/main.js?cb=8DCB3ECB413095BC01D1B29BF4757228 | 117 KB | 71 KB (61%) | ✓ | 3rd |
| https://openads-cdn.adsrvr.org/openadsjs/build/v1.0/ziffdavis/openads.js | 98 KB | 67 KB (69%) | ✓ | 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 InventoryAction176 resources · 9.7 MB · 1.8 MB savings availableFIX
~1.8 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 176 resources | 9.7 MiB | ||||||
BImage Optimization24 images, 0 KB saveableREVIEW
AThird-Party Impact37% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (2014 KB)PASS
Web fonts
6
2014 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
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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 ~1553 KB and ~3106 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
A+HTTP Cachingmax-age=1800 (30 minutes)PASS
public, max-age=1800
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| max-age | 1800 | Cache for 30 minutes |
Network Waterfall176 requests over 5265msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 784ms | 0 KB | — | €9/mo | Costly |
static-cdn.spot.im static-cdn.spot.im | Other | 422ms | 101 KB | 54% | €5/mo | Costly |
www.gstatic.com www.gstatic.com | Other | 365ms | 0 KB | 49% | €4/mo | Costly |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 351ms | 18 KB | — | €4/mo | Costly |
static-cdn.spot.im static-cdn.spot.im | Other | 199ms | 15 KB | — | €2/mo | Optional |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 183ms | 126 KB | 57% | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 180ms | 161 KB | 38% | €2/mo | Optional |
static-cdn.spot.im static-cdn.spot.im | Other | 179ms | 7 KB | — | €2/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 163ms | 188 KB | 67% | €2/mo | Optional |
client.aps.amazon-adsystem.com client.aps.amazon-adsystem.com | Other | 148ms | 91 KB | — | €2/mo | Optional |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 135ms | 84 KB | 81% | €1/mo | Optional |
assets.bounceexchange.com assets.bounceexchange.com | Other | 122ms | 42 KB | 81% | €1/mo | Optional |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 105ms | 232 KB | 81% | €1/mo | Optional |
forms.lifehacker.com forms.lifehacker.com | Other | 81ms | 117 KB | 61% | €1/mo | Optional |
assets.bounceexchange.com assets.bounceexchange.com | Other | 78ms | 116 KB | 76% | €1/mo | Optional |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 72ms | 0 KB | — | €1/mo | Optional |
openads-cdn.adsrvr.org openads-cdn.adsrvr.org | Other | 65ms | 98 KB | 69% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 61ms | 122 KB | 51% | €1/mo | Optional |
forms.lifehacker.com forms.lifehacker.com | Other | 59ms | 1 KB | — | €1/mo | Optional |
pub.doubleverify.com pub.doubleverify.com | Other | 55ms | 31 KB | — | €1/mo | Optional |
static-cdn.spot.im static-cdn.spot.im | Other | 54ms | 22 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 784ms and costs ~€9/month
- static-cdn.spot.im adds 422ms and costs ~€5/month
- www.gstatic.com adds 365ms and costs ~€4/month
- cdn.ziffstatic.com adds 351ms and costs ~€4/month
87% 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 784ms 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
static-cdn.spot.im takes 422ms 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
54% of static-cdn.spot.im'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.gstatic.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
cdn.ziffstatic.com takes 351ms 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
67% 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
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
81% of assets.bounceexchange.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
61% of forms.lifehacker.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
76% of assets.bounceexchange.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
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
51% 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