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
23 images, 0 KB saveable
REVIEW
23 images, 0 KB saveable
Warning::
!
https://www.last.fm/static/images/about/lastfm-pro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
23images54 KB
0oversized-0 KB
23legacy 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+
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
4 fonts (87 KB)
PASS
4 fonts (87 KB)
Info::
i
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
87 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
7cHqv4kjgoGqM7E3t-4s51o...woff2swap
Size15 KB
Load time9 ms
Start484 ms
RiskFOUT — text flashes from fallback to web font
7cHpv4kjgoGqM7E_DMs5yng...woff2swap
Size15 KB
Load time11 ms
Start485 ms
RiskFOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX...woff2swap
Size22 KB
Load time5 ms
Start493 ms
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size34 KB
Load time27 ms
Start1.8 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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
✓
Page uses 3 resource hint(s)
Current Resource Hints
preconnect—
preload
1
dns-prefetch
2
prefetch—
3 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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Google Cloud
Network Waterfall
161 requests over 4781ms
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-party9709ms · 1784KB · $129/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
cdnjs
cdnjs.cloudflare.com
CDN
1982ms
63 KB
55%
$26/mo
Costly
www.last.fm
www.last.fm
Other
1501ms
35 KB
—
$20/mo
Costly
Unattributable
Unattributable
Other
1114ms
0 KB
—
$15/mo
Costly
at.cbsi.com
at.cbsi.com
Other
594ms
229 KB
67%
$8/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
384ms
147 KB
42%
$5/mo
Costly
srv.tunefindforfans.com
srv.tunefindforfans.com
Other
339ms
39 KB
66%
$4/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
323ms
125 KB
49%
$4/mo
Costly
securepubads.g.doubleclick.net
securepubads.g.doubleclick.net
Other
315ms
188 KB
70%
$4/mo
Costly
www.last.fm
www.last.fm
Other
268ms
215 KB
69%
$4/mo
Costly
tags.tiqcdn.com
tags.tiqcdn.com
Other
267ms
30 KB
—
$4/mo
Costly
OneTrust
cdn.cookielaw.org
Consent
266ms
112 KB
57%
$4/mo
Essential
www.last.fm
www.last.fm
Other
244ms
7 KB
—
$3/mo
Costly
srv.tunefindforfans.com
srv.tunefindforfans.com
Other
235ms
35 KB
—
$3/mo
Costly
Google Analytics
www.google-analytics.com
Analytics
198ms
112 KB
60%
$3/mo
Optional
tags.tiqcdn.com
tags.tiqcdn.com
Other
187ms
35 KB
—
$2/mo
Optional
js-agent.newrelic.com
js-agent.newrelic.com
Other
169ms
28 KB
—
$2/mo
Optional
siteintercept.qualtrics.com
siteintercept.qualtrics.com
Other
159ms
36 KB
70%
$2/mo
Optional
b-code.liadm.com
b-code.liadm.com
Other
157ms
46 KB
—
$2/mo
Optional
fundingchoicesmessages.google.com
fundingchoicesmessages.google.com
Other
150ms
10 KB
—
$2/mo
Optional
Google Analytics
www.google-analytics.com
Analytics
128ms
21 KB
—
$2/mo
Optional
contextual.media.net
contextual.media.net
Other
123ms
42 KB
—
$2/mo
Optional
OneTrust
cdn.cookielaw.org
Consent
104ms
17 KB
—
$1/mo
Essential
securepubads.g.doubleclick.net
securepubads.g.doubleclick.net
Other
93ms
34 KB
—
$1/mo
Optional
OneTrust
cdn.cookielaw.org
Consent
84ms
9 KB
—
$1/mo
Essential
strangeclocks.com
strangeclocks.com
Other
83ms
36 KB
—
$1/mo
Optional
jsDelivr
cdn.jsdelivr.net
CDN
68ms
46 KB
51%
$1/mo
Optional
cdn.privacy.paramount.com
cdn.privacy.paramount.com
Other
63ms
7 KB
—
$1/mo
Optional
www.youtube.com
www.youtube.com
Other
58ms
11 KB
—
$1/mo
Optional
www.last.fm
www.last.fm
Other
51ms
72 KB
—
$1/mo
Optional
cdnjs
CDN
Costly
Execution1982ms
Transfer63 KB
Unused55%
Monthly Cost$26/mo
www.last.fm
Other
Costly
Execution1501ms
Transfer35 KB
Monthly Cost$20/mo
Unattributable
Other
Costly
Execution1114ms
Transfer0 KB
Monthly Cost$15/mo
at.cbsi.com
Other
Costly
Execution594ms
Transfer229 KB
Unused67%
Monthly Cost$8/mo
Google Tag Manager
Tag Manager
Costly
Execution384ms
Transfer147 KB
Unused42%
Monthly Cost$5/mo
srv.tunefindforfans.com
Other
Costly
Execution339ms
Transfer39 KB
Unused66%
Monthly Cost$4/mo
Google Tag Manager
Tag Manager
Costly
Execution323ms
Transfer125 KB
Unused49%
Monthly Cost$4/mo
securepubads.g.doubleclick.net
Other
Costly
Execution315ms
Transfer188 KB
Unused70%
Monthly Cost$4/mo
www.last.fm
Other
Costly
Execution268ms
Transfer215 KB
Unused69%
Monthly Cost$4/mo
tags.tiqcdn.com
Other
Costly
Execution267ms
Transfer30 KB
Monthly Cost$4/mo
OneTrust
Consent
Essential
Execution266ms
Transfer112 KB
Unused57%
Monthly Cost$4/mo
www.last.fm
Other
Costly
Execution244ms
Transfer7 KB
Monthly Cost$3/mo
srv.tunefindforfans.com
Other
Costly
Execution235ms
Transfer35 KB
Monthly Cost$3/mo
Google Analytics
Analytics
Optional
Execution198ms
Transfer112 KB
Unused60%
Monthly Cost$3/mo
tags.tiqcdn.com
Other
Optional
Execution187ms
Transfer35 KB
Monthly Cost$2/mo
js-agent.newrelic.com
Other
Optional
Execution169ms
Transfer28 KB
Monthly Cost$2/mo
siteintercept.qualtrics.com
Other
Optional
Execution159ms
Transfer36 KB
Unused70%
Monthly Cost$2/mo
b-code.liadm.com
Other
Optional
Execution157ms
Transfer46 KB
Monthly Cost$2/mo
fundingchoicesmessages.google.com
Other
Optional
Execution150ms
Transfer10 KB
Monthly Cost$2/mo
Google Analytics
Analytics
Optional
Execution128ms
Transfer21 KB
Monthly Cost$2/mo
contextual.media.net
Other
Optional
Execution123ms
Transfer42 KB
Monthly Cost$2/mo
OneTrust
Consent
Essential
Execution104ms
Transfer17 KB
Monthly Cost$1/mo
securepubads.g.doubleclick.net
Other
Optional
Execution93ms
Transfer34 KB
Monthly Cost$1/mo
OneTrust
Consent
Essential
Execution84ms
Transfer9 KB
Monthly Cost$1/mo
strangeclocks.com
Other
Optional
Execution83ms
Transfer36 KB
Monthly Cost$1/mo
jsDelivr
CDN
Optional
Execution68ms
Transfer46 KB
Unused51%
Monthly Cost$1/mo
cdn.privacy.paramount.com
Other
Optional
Execution63ms
Transfer7 KB
Monthly Cost$1/mo
www.youtube.com
Other
Optional
Execution58ms
Transfer11 KB
Monthly Cost$1/mo
www.last.fm
Other
Optional
Execution51ms
Transfer72 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
cdnjs adds 1982ms and costs ~$26/month
www.last.fm adds 1501ms and costs ~$20/month
Unattributable adds 1114ms and costs ~$15/month
at.cbsi.com adds 594ms and costs ~$8/month
Google Tag Manager adds 384ms and costs ~$5/month
srv.tunefindforfans.com adds 339ms and costs ~$4/month
Google Tag Manager adds 323ms and costs ~$4/month
securepubads.g.doubleclick.net adds 315ms and costs ~$4/month
www.last.fm adds 268ms and costs ~$4/month
tags.tiqcdn.com adds 267ms and costs ~$4/month
www.last.fm adds 244ms and costs ~$3/month
srv.tunefindforfans.com adds 235ms 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
cdnjs takes 1982ms 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
55% of cdnjs'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.last.fm takes 1501ms 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 1114ms 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
at.cbsi.com takes 594ms 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
67% of at.cbsi.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 384ms 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
srv.tunefindforfans.com takes 339ms 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
66% of srv.tunefindforfans.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 323ms 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
securepubads.g.doubleclick.net takes 315ms 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
70% of securepubads.g.doubleclick.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.last.fm takes 268ms 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
69% of www.last.fm'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
tags.tiqcdn.com takes 267ms 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 OneTrust'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.last.fm takes 244ms 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
srv.tunefindforfans.com takes 235ms 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
60% of Google Analytics'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
70% of siteintercept.qualtrics.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
51% of jsDelivr'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.