Consider code splitting or tree shaking to reduce unused code.
Why this matters
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.
Why this matters
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.
Why this matters
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.
Why this matters
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
✓
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
1 fonts (13 KB)
PASS
1 fonts (13 KB)
Info::
i
1 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
1
13 KB total
Render-blocking
0
of 1
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
octet-stream;base64,d09...unknownswap
Size13 KB
Load time38 ms
Start567 ms
RiskFOUT — text flashes from fallback to web font
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 ~4 KB and ~8 ms
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
✓
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
✓
No render-blocking resources detected
A+
Resource Hints
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
✓
Page uses 3 resource hint(s)
Current Resource Hints
preconnect—
preload
2
dns-prefetch
1
prefetch—
3 resource hints configured
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
✓
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall
81 requests over 2532ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100%of JavaScript execution is third-party
First-party Third-party2398ms · 612KB · $14/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.jezebel.com
www.jezebel.com
Other
462ms
42 KB
—
$3/mo
Costly
Unattributable
Unattributable
Other
342ms
0 KB
—
$2/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
301ms
158 KB
38%
$2/mo
Costly
eu-us-cdn.consentmanager.net
eu-us-cdn.consentmanager.net
Other
272ms
26 KB
—
$2/mo
Costly
www.jezebel.com
www.jezebel.com
Other
211ms
0 KB
—
$1/mo
Costly
scripts.pubnation.com
scripts.pubnation.com
Other
185ms
78 KB
53%
$1/mo
Optional
scripts.pubnation.com
scripts.pubnation.com
Other
135ms
9 KB
—
$1/mo
Optional
www.jezebel.com
www.jezebel.com
Other
133ms
7 KB
—
$1/mo
Optional
static.chartbeat.com
static.chartbeat.com
Other
98ms
16 KB
—
$1/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
75ms
111 KB
64%
$0/mo
Optional
eu-us-cdn.consentmanager.net
eu-us-cdn.consentmanager.net
Other
70ms
101 KB
35%
$0/mo
Optional
scripts.pubnation.com
scripts.pubnation.com
Other
58ms
32 KB
—
$0/mo
Optional
www.jezebel.com
www.jezebel.com
Other
57ms
31 KB
—
$0/mo
Optional
www.jezebel.com
Other
Costly
Execution462ms
Transfer42 KB
Monthly Cost$3/mo
Unattributable
Other
Costly
Execution342ms
Transfer0 KB
Monthly Cost$2/mo
Google Tag Manager
Tag Manager
Costly
Execution301ms
Transfer158 KB
Unused38%
Monthly Cost$2/mo
eu-us-cdn.consentmanager.net
Other
Costly
Execution272ms
Transfer26 KB
Monthly Cost$2/mo
www.jezebel.com
Other
Costly
Execution211ms
Transfer0 KB
Monthly Cost$1/mo
scripts.pubnation.com
Other
Optional
Execution185ms
Transfer78 KB
Unused53%
Monthly Cost$1/mo
scripts.pubnation.com
Other
Optional
Execution135ms
Transfer9 KB
Monthly Cost$1/mo
www.jezebel.com
Other
Optional
Execution133ms
Transfer7 KB
Monthly Cost$1/mo
static.chartbeat.com
Other
Optional
Execution98ms
Transfer16 KB
Monthly Cost$1/mo
Google Tag Manager
Tag Manager
Optional
Execution75ms
Transfer111 KB
Unused64%
Monthly Cost$0/mo
eu-us-cdn.consentmanager.net
Other
Optional
Execution70ms
Transfer101 KB
Unused35%
Monthly Cost$0/mo
scripts.pubnation.com
Other
Optional
Execution58ms
Transfer32 KB
Monthly Cost$0/mo
www.jezebel.com
Other
Optional
Execution57ms
Transfer31 KB
Monthly Cost$0/mo
These scripts may cost more than they're worth
www.jezebel.com adds 462ms and costs ~$3/month
Unattributable adds 342ms and costs ~$2/month
Google Tag Manager adds 301ms and costs ~$2/month
eu-us-cdn.consentmanager.net adds 272ms and costs ~$2/month
www.jezebel.com adds 211ms and costs ~$1/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
Why this matters
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.jezebel.com takes 462ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 342ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 301ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
eu-us-cdn.consentmanager.net takes 272ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.jezebel.com takes 211ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
53% of scripts.pubnation.com's code is unused. The script may be loading features you don't use.
Why this matters
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
64% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Why this matters
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.