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
10images811 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 time46 ms
Start942 ms
RiskFOUT — text flashes from fallback to web font
tDbw2o2WnlgI0FNDgduEk4j...woff2swap
Size26 KB
Load time53 ms
Start943 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 5148ms
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-party8344ms · 2428KB · €115/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
assets.change.org
assets.change.org
Other
2432ms
388 KB
64%
€34/mo
Costly
www.change.org
www.change.org
Other
1771ms
62 KB
—
€24/mo
Costly
assets.change.org
assets.change.org
Other
1450ms
496 KB
88%
€20/mo
Costly
Unattributable
Unattributable
Other
1034ms
0 KB
—
€14/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
370ms
157 KB
42%
€5/mo
Costly
cdn-pci.optimizely.com
cdn-pci.optimizely.com
Other
299ms
334 KB
80%
€4/mo
Costly
client.px-cloud.net
client.px-cloud.net
Other
228ms
133 KB
44%
€3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
173ms
166 KB
41%
€2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
145ms
145 KB
45%
€2/mo
Optional
js-agent.newrelic.com
js-agent.newrelic.com
Other
141ms
32 KB
—
€2/mo
Optional
assets.change.org
assets.change.org
Other
113ms
229 KB
100%
€2/mo
Optional
assets.change.org
assets.change.org
Other
74ms
116 KB
81%
€1/mo
Optional
assets.change.org
assets.change.org
Other
63ms
90 KB
46%
€1/mo
Optional
assets.change.org
assets.change.org
Other
52ms
81 KB
97%
€1/mo
Optional
assets.change.org
Other
Costly
Execution2432ms
Transfer388 KB
Unused64%
Monthly Cost€34/mo
www.change.org
Other
Costly
Execution1771ms
Transfer62 KB
Monthly Cost€24/mo
assets.change.org
Other
Costly
Execution1450ms
Transfer496 KB
Unused88%
Monthly Cost€20/mo
Unattributable
Other
Costly
Execution1034ms
Transfer0 KB
Monthly Cost€14/mo
Google Tag Manager
Tag Manager
Costly
Execution370ms
Transfer157 KB
Unused42%
Monthly Cost€5/mo
cdn-pci.optimizely.com
Other
Costly
Execution299ms
Transfer334 KB
Unused80%
Monthly Cost€4/mo
client.px-cloud.net
Other
Costly
Execution228ms
Transfer133 KB
Unused44%
Monthly Cost€3/mo
Google Tag Manager
Tag Manager
Optional
Execution173ms
Transfer166 KB
Unused41%
Monthly Cost€2/mo
Google Tag Manager
Tag Manager
Optional
Execution145ms
Transfer145 KB
Unused45%
Monthly Cost€2/mo
js-agent.newrelic.com
Other
Optional
Execution141ms
Transfer32 KB
Monthly Cost€2/mo
assets.change.org
Other
Optional
Execution113ms
Transfer229 KB
Unused100%
Monthly Cost€2/mo
assets.change.org
Other
Optional
Execution74ms
Transfer116 KB
Unused81%
Monthly Cost€1/mo
assets.change.org
Other
Optional
Execution63ms
Transfer90 KB
Unused46%
Monthly Cost€1/mo
assets.change.org
Other
Optional
Execution52ms
Transfer81 KB
Unused97%
Monthly Cost€1/mo
These scripts may cost more than they're worth
assets.change.org adds 2432ms and costs ~€34/month
www.change.org adds 1771ms and costs ~€24/month
assets.change.org adds 1450ms and costs ~€20/month
Unattributable adds 1034ms and costs ~€14/month
Google Tag Manager adds 370ms and costs ~€5/month
cdn-pci.optimizely.com adds 299ms and costs ~€4/month
client.px-cloud.net adds 228ms 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 2432ms 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 1771ms 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 1450ms 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 1034ms 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 370ms 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 299ms 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
80% 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
client.px-cloud.net takes 228ms 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
97% 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.