Whether the site is served from green-energy infrastructure
REVIEW
Green Hosting
No green hosting detected
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+
Image Optimization
1 images, 0 KB saveable
PASS
1 images, 0 KB saveable
Warning::
!
https://static.xx.fbcdn.net/rsrc.php/y0/r/U45qBJmW... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
1images177 KB
0oversized-0 KB
0legacy format
1missing dimensionsCLS risk
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
A+
Font Loading
2 fonts (208 KB)
PASS
2 fonts (208 KB)
Info::
i
2 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
2
208 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
9AJbVCy4-G1.woff2woff2swap
Size29 KB
Load time17 ms
Start659 ms
RiskFOUT — text flashes from fallback to web font
-pkMfchyeAZ.woff2woff2swap
Size179 KB
Load time21 ms
Start659 ms
RiskFOUT — text flashes from fallback to web font
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 ~90 KB and ~180 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
No optimization needed
PASS
No optimization needed
Info::
✓
No resource hint issues
Network Waterfall
38 requests over 2244ms
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-party1334ms · 532KB · $18/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
static.xx.fbcdn.net
static.xx.fbcdn.net
Other
652ms
73 KB
52%
$9/mo
Costly
static.xx.fbcdn.net
static.xx.fbcdn.net
Other
216ms
153 KB
56%
$3/mo
Costly
www.facebook.com
www.facebook.com
Other
212ms
74 KB
—
$3/mo
Costly
Unattributable
Unattributable
Other
185ms
0 KB
—
$2/mo
Optional
static.xx.fbcdn.net
static.xx.fbcdn.net
Other
68ms
233 KB
48%
$1/mo
Optional
static.xx.fbcdn.net
Other
Costly
Execution652ms
Transfer73 KB
Unused52%
Monthly Cost$9/mo
static.xx.fbcdn.net
Other
Costly
Execution216ms
Transfer153 KB
Unused56%
Monthly Cost$3/mo
www.facebook.com
Other
Costly
Execution212ms
Transfer74 KB
Monthly Cost$3/mo
Unattributable
Other
Optional
Execution185ms
Transfer0 KB
Monthly Cost$2/mo
static.xx.fbcdn.net
Other
Optional
Execution68ms
Transfer233 KB
Unused48%
Monthly Cost$1/mo
These scripts may cost more than they're worth
static.xx.fbcdn.net adds 652ms and costs ~$9/month
static.xx.fbcdn.net adds 216ms and costs ~$3/month
www.facebook.com adds 212ms and costs ~$3/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
static.xx.fbcdn.net takes 652ms 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
52% of static.xx.fbcdn.net'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
static.xx.fbcdn.net takes 216ms 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
56% of static.xx.fbcdn.net'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
www.facebook.com takes 212ms 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.