Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
C
Green Hosting
Action
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
10 images, 0 KB saveable
PASS
10 images, 0 KB saveable
Info::
✓
All images are well-optimized
10images810 KB
0oversized-0 KB
2legacy format
0missing dimensionsCLS risk
A+
Font Loading
2 fonts (62 KB)
PASS
2 fonts (62 KB)
Info::
i
2 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
2
62 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
tDbw2o2WnlgI0FNDgduEk4j...woff2swap
Size36 KB
Load time39 ms
Start754 ms
RiskFOUT — text flashes from fallback to web font
tDbw2o2WnlgI0FNDgduEk4j...woff2swap
Size26 KB
Load time34 ms
Start983 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)
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
8 hints, 0 missing preconnects
PASS
8 hints, 0 missing preconnects
Info::
✓
Page uses 8 resource hint(s)
Current Resource Hints
preconnect
2
preload
6
dns-prefetch—
prefetch—
8 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
Network Waterfall
96 requests over 4328ms
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-party7474ms · 2417KB · €130/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
assets.change.org
assets.change.org
Other
2062ms
388 KB
64%
€36/mo
Costly
www.change.org
www.change.org
Other
1770ms
62 KB
—
€31/mo
Costly
assets.change.org
assets.change.org
Other
1230ms
499 KB
88%
€21/mo
Costly
Unattributable
Unattributable
Other
811ms
0 KB
—
€14/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
397ms
145 KB
45%
€7/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
278ms
157 KB
42%
€5/mo
Costly
cdn-pci.optimizely.com
cdn-pci.optimizely.com
Other
208ms
305 KB
79%
€4/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
200ms
165 KB
41%
€3/mo
Costly
client.px-cloud.net
client.px-cloud.net
Other
159ms
133 KB
46%
€3/mo
Optional
js-agent.newrelic.com
js-agent.newrelic.com
Other
125ms
32 KB
—
€2/mo
Optional
assets.change.org
assets.change.org
Other
71ms
229 KB
100%
€1/mo
Optional
assets.change.org
assets.change.org
Other
59ms
116 KB
81%
€1/mo
Optional
accounts.google.com
accounts.google.com
Other
53ms
96 KB
84%
€1/mo
Optional
assets.change.org
assets.change.org
Other
52ms
90 KB
46%
€1/mo
Optional
assets.change.org
Other
Costly
Execution2062ms
Transfer388 KB
Unused64%
Monthly Cost€36/mo
www.change.org
Other
Costly
Execution1770ms
Transfer62 KB
Monthly Cost€31/mo
assets.change.org
Other
Costly
Execution1230ms
Transfer499 KB
Unused88%
Monthly Cost€21/mo
Unattributable
Other
Costly
Execution811ms
Transfer0 KB
Monthly Cost€14/mo
Google Tag Manager
Tag Manager
Costly
Execution397ms
Transfer145 KB
Unused45%
Monthly Cost€7/mo
Google Tag Manager
Tag Manager
Costly
Execution278ms
Transfer157 KB
Unused42%
Monthly Cost€5/mo
cdn-pci.optimizely.com
Other
Costly
Execution208ms
Transfer305 KB
Unused79%
Monthly Cost€4/mo
Google Tag Manager
Tag Manager
Costly
Execution200ms
Transfer165 KB
Unused41%
Monthly Cost€3/mo
client.px-cloud.net
Other
Optional
Execution159ms
Transfer133 KB
Unused46%
Monthly Cost€3/mo
js-agent.newrelic.com
Other
Optional
Execution125ms
Transfer32 KB
Monthly Cost€2/mo
assets.change.org
Other
Optional
Execution71ms
Transfer229 KB
Unused100%
Monthly Cost€1/mo
assets.change.org
Other
Optional
Execution59ms
Transfer116 KB
Unused81%
Monthly Cost€1/mo
accounts.google.com
Other
Optional
Execution53ms
Transfer96 KB
Unused84%
Monthly Cost€1/mo
assets.change.org
Other
Optional
Execution52ms
Transfer90 KB
Unused46%
Monthly Cost€1/mo
These scripts may cost more than they're worth
assets.change.org adds 2062ms and costs ~€36/month
www.change.org adds 1770ms and costs ~€31/month
assets.change.org adds 1230ms and costs ~€21/month
Unattributable adds 811ms and costs ~€14/month
Google Tag Manager adds 397ms and costs ~€7/month
Google Tag Manager adds 278ms and costs ~€5/month
cdn-pci.optimizely.com adds 208ms and costs ~€4/month
Google Tag Manager adds 200ms 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
assets.change.org takes 2062ms 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
64% of assets.change.org'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.change.org takes 1770ms 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
assets.change.org takes 1230ms 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
88% of assets.change.org'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
Unattributable takes 811ms 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 397ms 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 278ms 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
cdn-pci.optimizely.com takes 208ms 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
79% of cdn-pci.optimizely.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
Google Tag Manager takes 200ms 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
100% of assets.change.org'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
81% of assets.change.org'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
84% of accounts.google.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.