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.
B
Image Optimization
21 images, 0 KB saveable
REVIEW
21 images, 0 KB saveable
Warning::
!
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
21images291 KB
0oversized-0 KB
6legacy format
1missing dimensionsCLS risk
Set explicit width and height to prevent CLS.
Why this matters
Performance issues directly impact user engagement and conversion rates.
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+
Font Loading
3 fonts (334 KB)
PASS
3 fonts (334 KB)
Info::
i
3 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
3
334 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
Inter-Regular.woff2woff2swap
Size109 KB
Load time91 ms
Start321 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
Inter-SemiBold.woff2woff2swap
Size113 KB
Load time144 ms
Start380 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
Inter-Medium.woff2woff2swap
Size112 KB
Load time80 ms
Start381 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 ~167 KB and ~334 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
✓
Page uses 4 resource hint(s)
Current Resource Hints
preconnect
1
preload
3
dns-prefetch—
prefetch—
4 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
100 requests over 11258ms
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-party35999ms · 1311KB · £373/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.awin.com
www.awin.com
Other
20909ms
151 KB
58%
£217/mo
Costly
www.awin.com
www.awin.com
Other
10976ms
95 KB
—
£114/mo
Costly
Unattributable
Unattributable
Other
2100ms
0 KB
—
£22/mo
Costly
cdn.eu.amplitude.com
cdn.eu.amplitude.com
Other
444ms
44 KB
57%
£5/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
297ms
174 KB
38%
£3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
203ms
166 KB
51%
£2/mo
Costly
cdn.eu.amplitude.com
cdn.eu.amplitude.com
Other
202ms
40 KB
53%
£2/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
169ms
125 KB
50%
£2/mo
Optional
cdn.eu.amplitude.com
cdn.eu.amplitude.com
Other
168ms
123 KB
79%
£2/mo
Optional
Facebook Pixel
connect.facebook.net
Advertising
127ms
97 KB
34%
£1/mo
Optional
Facebook Pixel
connect.facebook.net
Advertising
114ms
46 KB
—
£1/mo
Optional
web.cmp.usercentrics.eu
web.cmp.usercentrics.eu
Other
111ms
56 KB
63%
£1/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
104ms
137 KB
47%
£1/mo
Optional
s.go-mpulse.net
s.go-mpulse.net
Other
76ms
57 KB
56%
£1/mo
Optional
www.awin.com
Other
Costly
Execution20909ms
Transfer151 KB
Unused58%
Monthly Cost£217/mo
www.awin.com
Other
Costly
Execution10976ms
Transfer95 KB
Monthly Cost£114/mo
Unattributable
Other
Costly
Execution2100ms
Transfer0 KB
Monthly Cost£22/mo
cdn.eu.amplitude.com
Other
Costly
Execution444ms
Transfer44 KB
Unused57%
Monthly Cost£5/mo
Google Tag Manager
Tag Manager
Costly
Execution297ms
Transfer174 KB
Unused38%
Monthly Cost£3/mo
Google Tag Manager
Tag Manager
Costly
Execution203ms
Transfer166 KB
Unused51%
Monthly Cost£2/mo
cdn.eu.amplitude.com
Other
Costly
Execution202ms
Transfer40 KB
Unused53%
Monthly Cost£2/mo
Google Tag Manager
Tag Manager
Optional
Execution169ms
Transfer125 KB
Unused50%
Monthly Cost£2/mo
cdn.eu.amplitude.com
Other
Optional
Execution168ms
Transfer123 KB
Unused79%
Monthly Cost£2/mo
Facebook Pixel
Advertising
Optional
Execution127ms
Transfer97 KB
Unused34%
Monthly Cost£1/mo
Facebook Pixel
Advertising
Optional
Execution114ms
Transfer46 KB
Monthly Cost£1/mo
web.cmp.usercentrics.eu
Other
Optional
Execution111ms
Transfer56 KB
Unused63%
Monthly Cost£1/mo
Google Tag Manager
Tag Manager
Optional
Execution104ms
Transfer137 KB
Unused47%
Monthly Cost£1/mo
s.go-mpulse.net
Other
Optional
Execution76ms
Transfer57 KB
Unused56%
Monthly Cost£1/mo
These scripts may cost more than they're worth
www.awin.com adds 20909ms and costs ~£217/month
www.awin.com adds 10976ms and costs ~£114/month
Unattributable adds 2100ms and costs ~£22/month
cdn.eu.amplitude.com adds 444ms and costs ~£5/month
Google Tag Manager adds 297ms and costs ~£3/month
Google Tag Manager adds 203ms and costs ~£2/month
cdn.eu.amplitude.com adds 202ms and costs ~£2/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.awin.com takes 20909ms 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
58% of www.awin.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
www.awin.com takes 10976ms 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 2100ms 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.eu.amplitude.com takes 444ms 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
57% of cdn.eu.amplitude.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 297ms 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 203ms 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
51% 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.
Source: web.dev
cdn.eu.amplitude.com takes 202ms 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 cdn.eu.amplitude.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
50% 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.
Source: web.dev
79% of cdn.eu.amplitude.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
63% of web.cmp.usercentrics.eu'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
56% of s.go-mpulse.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.