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.
11.72 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
41.23 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
4.86 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.
11.72 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.
43.31 s
Page Load Progression
FPage Weight BudgetAction9.6 MB transferred, 178 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 CostAction19311ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 2915ms | 536ms | 0ms | 3rd |
| https://static-cdn.spot.im/production/social/tags/v5.26.0/launcher/691-bundle.js | 2357ms | 2123ms | 54ms | 3rd |
| https://cdn.ziffstatic.com/jst/otTCF.202512.1.0.js | 1665ms | 1414ms | 23ms | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 1319ms | 1145ms | 141ms | 3rd |
| https://lifehacker.com/ | 1244ms | 163ms | 16ms | 1st |
| https://static-cdn.spot.im/production/social/tags/v5.26.0/launcher/696-bundle.js | 856ms | 235ms | 3ms | 3rd |
| https://static-cdn.spot.im/production/social/tags/v5.26.0/launcher/entry-bundle.js | 764ms | 724ms | 6ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-7E851STSQZ | 722ms | 609ms | 86ms | 3rd |
| https://cdn.ziffstatic.com/jst/otBannerSdk.202512.1.0.js | 708ms | 529ms | 108ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 648ms | 494ms | 98ms | 3rd |
Showing top 10 of 35 scripts
FJS BundlesAction79 scripts, 1.7 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 | 362 KB | 162 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 162 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 162 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 162 KB (49%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 188 KB | 128 KB (68%) | ✓ | 3rd |
| https://assets.bounceexchange.com/assets/smart-tag/versioned/main-v2_567848e754a175dbe621932e8f6a1b7e.br.js | 116 KB | 87 KB (75%) | ✓ | 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://cdn.ziffstatic.com/pg/lifehacker.js | 84 KB | 68 KB (81%) | ✓ | 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 InventoryAction178 resources · 9.6 MB · 1.7 MB savings availableFIX
~1.7 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 178 resources | 9.6 MiB | ||||||
BImage Optimization22 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 Hints19 hints, 0 missing preconnectsPASS
Current Resource Hints
19 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: 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 Waterfall178 requests over 6284msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 2915ms | 0 KB | — | €32/mo | Costly |
static-cdn.spot.im static-cdn.spot.im | Other | 2357ms | 101 KB | 54% | €26/mo | Costly |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 1665ms | 18 KB | — | €18/mo | Costly |
www.gstatic.com www.gstatic.com | Other | 1319ms | 0 KB | 49% | €14/mo | Costly |
static-cdn.spot.im static-cdn.spot.im | Other | 856ms | 7 KB | — | €9/mo | Costly |
static-cdn.spot.im static-cdn.spot.im | Other | 764ms | 15 KB | — | €8/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 722ms | 161 KB | 38% | €8/mo | Costly |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 708ms | 126 KB | 57% | €8/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 648ms | 188 KB | 68% | €7/mo | Costly |
client.aps.amazon-adsystem.com client.aps.amazon-adsystem.com | Other | 599ms | 91 KB | 55% | €6/mo | Costly |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 582ms | 232 KB | 81% | €6/mo | Costly |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 547ms | 84 KB | 81% | €6/mo | Costly |
static-cdn.spot.im static-cdn.spot.im | Other | 411ms | 11 KB | — | €4/mo | Costly |
assets.bounceexchange.com assets.bounceexchange.com | Other | 388ms | 116 KB | 75% | €4/mo | Costly |
cdn.ziffstatic.com cdn.ziffstatic.com | Other | 297ms | 0 KB | — | €3/mo | Costly |
static-cdn.spot.im static-cdn.spot.im | Other | 292ms | 55 KB | 69% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 241ms | 122 KB | 51% | €3/mo | Costly |
openads-cdn.adsrvr.org openads-cdn.adsrvr.org | Other | 240ms | 98 KB | — | €3/mo | Costly |
forms.lifehacker.com forms.lifehacker.com | Other | 217ms | 1 KB | — | €2/mo | Costly |
assets.bounceexchange.com assets.bounceexchange.com | Other | 217ms | 42 KB | 81% | €2/mo | Costly |
forms.lifehacker.com forms.lifehacker.com | Other | 214ms | 117 KB | 61% | €2/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 172ms | 34 KB | — | €2/mo | Optional |
pub.doubleverify.com pub.doubleverify.com | Other | 166ms | 31 KB | — | €2/mo | Optional |
static.chartbeat.com static.chartbeat.com | Other | 160ms | 25 KB | — | €2/mo | Optional |
cdn.static.zdbb.net cdn.static.zdbb.net | Other | 158ms | 0 KB | — | €2/mo | Optional |
assets.bounceexchange.com assets.bounceexchange.com | Other | 136ms | 16 KB | — | €1/mo | Optional |
static-cdn.spot.im static-cdn.spot.im | Other | 118ms | 72 KB | 60% | €1/mo | Optional |
cdn.id5-sync.com cdn.id5-sync.com | Other | 117ms | 34 KB | — | €1/mo | Optional |
assets.bounceexchange.com assets.bounceexchange.com | Other | 67ms | 30 KB | 76% | €1/mo | Optional |
static-cdn.spot.im static-cdn.spot.im | Other | 63ms | 3 KB | — | €1/mo | Optional |
tru.am tru.am | Other | 55ms | 2 KB | — | €1/mo | Optional |
launcher.spot.im launcher.spot.im | Other | 53ms | 19 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 2915ms and costs ~€32/month
- static-cdn.spot.im adds 2357ms and costs ~€26/month
- cdn.ziffstatic.com adds 1665ms and costs ~€18/month
- www.gstatic.com adds 1319ms and costs ~€14/month
- static-cdn.spot.im adds 856ms and costs ~€9/month
- static-cdn.spot.im adds 764ms and costs ~€8/month
- Google Tag Manager adds 722ms and costs ~€8/month
- cdn.ziffstatic.com adds 708ms and costs ~€8/month
- securepubads.g.doubleclick.net adds 648ms and costs ~€7/month
- client.aps.amazon-adsystem.com adds 599ms and costs ~€6/month
- cdn.ziffstatic.com adds 582ms and costs ~€6/month
- cdn.ziffstatic.com adds 547ms and costs ~€6/month
- static-cdn.spot.im adds 411ms and costs ~€4/month
- assets.bounceexchange.com adds 388ms and costs ~€4/month
- cdn.ziffstatic.com adds 297ms and costs ~€3/month
- static-cdn.spot.im adds 292ms and costs ~€3/month
- Google Tag Manager adds 241ms and costs ~€3/month
- openads-cdn.adsrvr.org adds 240ms and costs ~€3/month
- forms.lifehacker.com adds 217ms and costs ~€2/month
- assets.bounceexchange.com adds 217ms and costs ~€2/month
- forms.lifehacker.com adds 214ms and costs ~€2/month
90% 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 2915ms 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 2357ms 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
cdn.ziffstatic.com takes 1665ms 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.gstatic.com takes 1319ms 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 856ms 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 764ms 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 722ms 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 708ms 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
securepubads.g.doubleclick.net takes 648ms 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
client.aps.amazon-adsystem.com takes 599ms 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
cdn.ziffstatic.com takes 582ms 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
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
cdn.ziffstatic.com takes 547ms 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
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
static-cdn.spot.im takes 411ms 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
assets.bounceexchange.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
75% 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
cdn.ziffstatic.com takes 297ms 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 292ms 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
69% 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
Google Tag Manager takes 241ms 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 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
openads-cdn.adsrvr.org takes 240ms 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
forms.lifehacker.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
assets.bounceexchange.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
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
forms.lifehacker.com takes 214ms 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
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
60% 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
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