Whether the site is served from green-energy infrastructure
REVIEW
Green Hosting
No green hosting detected
B
HTTP Caching
max-age=0
REVIEW
max-age=0
Info::
✓
Cache-Control header is set
Got: max-age=0
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
max-age=0
Directive
Value
Meaning
max-age
0
Cache for 0 seconds
A
Page Weight Budget
876 KB transferred, 40 requests
PASS
876 KB transferred, 40 requests
Info::
✓
Page weighs 2.3 MB (876 KB transferred)
Warning::
!
JavaScript is 812 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 812 KB
Info::
✓
40 HTTP requests
Info::
i
Estimated 0.18 g CO2 per page load
876 KBtransferred
40 requests
0.18 g CO2 per page load
JavaScript812.0 KiB93%
Fonts36.7 KiB4%
HTML8.3 KiB1%
Images7.2 KiB1%
Other7.1 KiB1%
CSS2.9 KiB0%
Other2.0 KiB0%
Other0 B0%
02.4 MB4.9 MB
Under budget
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Why this matters
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
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://content.spirit.com/a/1679 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
1images7 KB
0oversized-0 KB
1legacy 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 (37 KB)
PASS
2 fonts (37 KB)
Info::
i
2 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
2
37 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size37 KB
Load time103 ms
Start4.9 s
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size0 KB
Load time2 ms
Start5.0 s
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)
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
40 requests over 6885ms
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-party1934ms · 215KB · $26/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
client.px-cloud.net
client.px-cloud.net
Other
773ms
0 KB
30%
$10/mo
Costly
captcha.px-cloud.net
captcha.px-cloud.net
Other
413ms
0 KB
18%
$5/mo
Costly
www.spirit.com
www.spirit.com
Other
240ms
57 KB
—
$3/mo
Costly
www.spirit.com
www.spirit.com
Other
172ms
153 KB
19%
$2/mo
Optional
www.spirit.com
www.spirit.com
Other
138ms
1 KB
21%
$2/mo
Optional
Unattributable
Unattributable
Other
109ms
0 KB
—
$1/mo
Optional
www.spirit.com
www.spirit.com
Other
89ms
4 KB
—
$1/mo
Optional
client.px-cloud.net
Other
Costly
Execution773ms
Transfer0 KB
Unused30%
Monthly Cost$10/mo
captcha.px-cloud.net
Other
Costly
Execution413ms
Transfer0 KB
Unused18%
Monthly Cost$5/mo
www.spirit.com
Other
Costly
Execution240ms
Transfer57 KB
Monthly Cost$3/mo
www.spirit.com
Other
Optional
Execution172ms
Transfer153 KB
Unused19%
Monthly Cost$2/mo
www.spirit.com
Other
Optional
Execution138ms
Transfer1 KB
Unused21%
Monthly Cost$2/mo
Unattributable
Other
Optional
Execution109ms
Transfer0 KB
Monthly Cost$1/mo
www.spirit.com
Other
Optional
Execution89ms
Transfer4 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
client.px-cloud.net adds 773ms and costs ~$10/month
captcha.px-cloud.net adds 413ms and costs ~$5/month
www.spirit.com adds 240ms 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
client.px-cloud.net takes 773ms 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
captcha.px-cloud.net takes 413ms 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.spirit.com takes 240ms 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.