Consider code splitting or tree shaking to reduce unused code.
Why this matters
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
Why this matters
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
Why this matters
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
Why this matters
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
Why this matters
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
i
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
B
Compression Algorithm
Main response uses gzip; brotli would be ~20% smaller
REVIEW
Main response uses gzip; brotli would be ~20% smaller
Info::
i
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
B
Main HTML Cache-Control
Cache-Control present but without max-age
REVIEW
Cache-Control present but without max-age
Info::
i
Main HTML Cache-Control has no max-age: private
Got: private
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
i
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW
Green Hosting
No green hosting detected
B
HTTP Caching
private
REVIEW
private
Info::
✓
Cache-Control header is set
Got: private
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
private
Directive
Value
Meaning
private
—
Only browser cache, not CDN/proxy
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
6 fonts (264 KB)
PASS
6 fonts (264 KB)
Info::
i
6 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
6
264 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
rP2Hp2ywxg089UriCZOIHTW...woff2swap
Size61 KB
Load time119 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
BngMUXZYTXPIvIBgJJSb6uf...woff2swap
Size33 KB
Load time119 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
rP2Fp2ywxg089UriCZa4Hz-...woff2swap
Size74 KB
Load time129 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
UcC73FwrK3iLTeHuS_nVMrM...woff2swap
Size47 KB
Load time41 ms
Start1.9 s
RiskFOUT — text flashes from fallback to web font
truetype;base64,AAEAAAA...unknownswap
Size2 KB
Load time29 ms
Start3.1 s
RiskFOUT — text flashes from fallback to web font
Jqz55SSPQuCQF3t8uOwiUL-...woff2swap
Size46 KB
Load time40 ms
Start3.1 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)
Fixing the unchecked items could save ~1 KB and ~2 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
No optimization needed
PASS
No optimization needed
Info::
✓
No resource hint issues
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
✓
LCP image preload audit not available for this scan
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
✓
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
i
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
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
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
!
Total JS execution time is 8.6 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
✓
No CSS performance depth issues detected
Network Waterfall
67 requests over 3469ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
75%of JavaScript execution is third-party
First-party Third-party6423ms · 757KB · €62/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
wsv3cdn.audioeye.com
wsv3cdn.audioeye.com
Other
4988ms
86 KB
38%
€48/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
352ms
176 KB
41%
€3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
344ms
157 KB
35%
€3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
257ms
158 KB
43%
€2/mo
Costly
wsv3cdn.audioeye.com
wsv3cdn.audioeye.com
Other
186ms
125 KB
56%
€2/mo
Optional
scorpionconnect.scorpion.co
scorpionconnect.scorpion.co
Other
161ms
38 KB
—
€2/mo
Optional
wsv3cdn.audioeye.com
wsv3cdn.audioeye.com
Other
76ms
14 KB
—
€1/mo
Optional
scorpionconnect.scorpion.co
scorpionconnect.scorpion.co
Other
59ms
2 KB
—
€1/mo
Optional
wsv3cdn.audioeye.com
Other
Costly
Execution4988ms
Transfer86 KB
Unused38%
Monthly Cost€48/mo
Google Tag Manager
Tag Manager
Costly
Execution352ms
Transfer176 KB
Unused41%
Monthly Cost€3/mo
Google Tag Manager
Tag Manager
Costly
Execution344ms
Transfer157 KB
Unused35%
Monthly Cost€3/mo
Google Tag Manager
Tag Manager
Costly
Execution257ms
Transfer158 KB
Unused43%
Monthly Cost€2/mo
wsv3cdn.audioeye.com
Other
Optional
Execution186ms
Transfer125 KB
Unused56%
Monthly Cost€2/mo
scorpionconnect.scorpion.co
Other
Optional
Execution161ms
Transfer38 KB
Monthly Cost€2/mo
wsv3cdn.audioeye.com
Other
Optional
Execution76ms
Transfer14 KB
Monthly Cost€1/mo
scorpionconnect.scorpion.co
Other
Optional
Execution59ms
Transfer2 KB
Monthly Cost€1/mo
These scripts may cost more than they're worth
wsv3cdn.audioeye.com adds 4988ms and costs ~€48/month
Google Tag Manager adds 352ms and costs ~€3/month
Google Tag Manager adds 344ms and costs ~€3/month
Google Tag Manager adds 257ms and costs ~€2/month
75% 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
wsv3cdn.audioeye.com takes 4988ms 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 352ms 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 344ms 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 257ms 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
56% of wsv3cdn.audioeye.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.