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
Image Optimization
Action
78 images, 0 KB saveable
REVIEW
78 images, 0 KB saveable
Warning::
!
https://www.spizoo.com/assets/img/censorship/logos... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.spizoo.com/assets/img/censorship/logos... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.spizoo.com/assets/img/censorship/logos... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.spizoo.com/assets/img/censorship/logos... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.spizoo.com/assets/img/censorship/logos... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.spizoo.com/assets/img/censorship/logos... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://content.spizoo.com/members/content/dvds/lo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
78images4.4 MB
0oversized-0 KB
72legacy format
31missing 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Set explicit width and height to prevent CLS.
Why this matters
Performance issues directly impact user engagement and conversion rates.
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
i
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
i
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
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
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 (304 KB)
PASS
4 fonts (304 KB)
Info::
i
4 font(s) use font-display: swap (FOUT risk but functional)
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
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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
✓
Page uses 2 resource hint(s)
Current Resource Hints
preconnect—
preload
2
dns-prefetch—
prefetch—
2 resource hints configured
A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
✓
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
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
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
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 3.6 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
93 requests over 4544ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
72%of JavaScript execution is third-party
First-party Third-party2578ms · 202KB · $34/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.spizoo.com
www.spizoo.com
Other
1670ms
134 KB
—
$22/mo
Costly
www.spizoo.com
www.spizoo.com
Other
826ms
68 KB
43%
$11/mo
Costly
www.spizoo.com
www.spizoo.com
Other
82ms
0 KB
—
$1/mo
Optional
www.spizoo.com
Other
Costly
Execution1670ms
Transfer134 KB
Monthly Cost$22/mo
www.spizoo.com
Other
Costly
Execution826ms
Transfer68 KB
Unused43%
Monthly Cost$11/mo
www.spizoo.com
Other
Optional
Execution82ms
Transfer0 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
www.spizoo.com adds 1670ms and costs ~$22/month
www.spizoo.com adds 826ms and costs ~$11/month
72% 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.spizoo.com takes 1670ms 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
www.spizoo.com takes 826ms 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.
838 ms
4.2 s
5.0 s
5.9 s
6.7 s