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
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: s-maxage=31536000
Got: s-maxage=31536000
B
JavaScript Blocking
2 JS blocking issue(s) detected
REVIEW
2 JS blocking issue(s) detected
Warning::
!
1 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Warning::
!
Total JS execution time is 39.9 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.
B
HTTP Caching
s-maxage=31536000
REVIEW
s-maxage=31536000
Info::
✓
Cache-Control header is set
Got: s-maxage=31536000
Info::
✓
CDN TTL: 52 weeks (s-maxage=31536000)
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
s-maxage=31536000
Directive
Value
Meaning
s-maxage
31536000
CDN caches for 52 weeks
A+
Page Weight Budget
556 KB transferred, 49 requests
PASS
556 KB transferred, 49 requests
Info::
✓
Page weighs 1.6 MB (556 KB transferred)
Info::
✓
49 HTTP requests
Info::
i
Estimated 0.11 g CO2 per page load
556 KBtransferred
49 requests
0.11 g CO2 per page load
JavaScript364.4 KiB66%
Fonts92.5 KiB17%
HTML32.6 KiB6%
Images23.9 KiB4%
CSS19.7 KiB4%
Other18.8 KiB3%
Other2.0 KiB0%
Other1001 B0%
Other893 B0%
Other48 B0%
02.4 MB4.9 MB
Under budget
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 (93 KB)
PASS
3 fonts (93 KB)
Info::
i
3 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
3
93 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
V8mDoQDjQSkFtoMM3T6r8E7...woff2swap
Size22 KB
Load time22 ms
Start589 ms
RiskFOUT — text flashes from fallback to web font
UcC73FwrK3iLTeHuS_nVMrM...woff2swap
Size47 KB
Load time20 ms
Start605 ms
RiskFOUT — text flashes from fallback to web font
co3smX5slCNuHLi8bLeY9MK...woff2swap
Size23 KB
Load time5 ms
Start1.1 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)
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
19 hints, 0 missing preconnects
PASS
19 hints, 0 missing preconnects
Info::
✓
Page uses 19 resource hint(s)
Current Resource Hints
preconnect
2
preload
+7
17
dns-prefetch—
prefetch—
19 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+
Compression Algorithm
Main response uses brotli
PASS
Main response uses brotli
Info::
✓
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
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
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.