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.
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
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.
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
Warning::
!
23 `@font-face` rule(s) without `font-display` -- causes FOIT
An `@font-face` rule without `font-display` causes Flash of Invisible Text (FOIT): the browser hides the styled text for up to 3 seconds while the custom font downloads, then either swaps to fallback (Chrome / Firefox) or stays invisible (older Safari). Add `font-display: swap` (shows fallback immediately, swaps in the custom font when ready) or `font-display: optional` (uses fallback if the font isn't ready in 100ms; never causes visible swap). Either eliminates FOIT outright.
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
Image Optimization
26 images, 0 KB saveable
PASS
26 images, 0 KB saveable
Info::
✓
All images are well-optimized
26images811 KB
0oversized-0 KB
2legacy format
0missing dimensionsCLS risk
A+
Font Loading
9 fonts (262 KB)
PASS
9 fonts (262 KB)
Info::
i
9 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
9
262 KB total
Render-blocking
0
of 9
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
fontawesome-webfont.woffwoffswap
Size96 KB
Load time66 ms
Start500 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Futura+Book+font-4ed9_4...ttfswap
Size24 KB
Load time84 ms
Start524 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Futura+Heavy+font-59dc_...ttfswap
Size25 KB
Load time75 ms
Start525 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
futura+light+bt-5af_400...ttfswap
Size24 KB
Load time78 ms
Start526 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
futura+medium+bt-78d0_4...ttfswap
Size25 KB
Load time467 ms
Start526 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size42 KB
Load time69 ms
Start527 ms
RiskFOUT — text flashes from fallback to web font
5aU69_a8oxmIdGl4BA.woff2woff2swap
Size16 KB
Load time22 ms
Start1.2 s
RiskFOUT — text flashes from fallback to web font
dm-common-icons.ttfttfswap
Size3 KB
Load time20 ms
Start1.2 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
dm-social-icons.ttfttfswap
Size5 KB
Load time20 ms
Start1.2 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
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 ~61 KB and ~122 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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
✓
Page uses 2 resource hint(s)
Current Resource Hints
preconnect
1
preload—
dns-prefetch—
prefetch
1
2 resource hints configured
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+
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
✓
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-cache, no-store, must-revalidate
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::
!
4 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.
Network Waterfall
82 requests over 2085ms
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-party1855ms · 370KB · A$32/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.passionfish.com.au
www.passionfish.com.au
Other
838ms
31 KB
—
A$14/mo
Costly
Unattributable
Unattributable
Other
293ms
0 KB
—
A$5/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
206ms
169 KB
41%
A$4/mo
Costly
static.cdn-website.com
static.cdn-website.com
Other
148ms
96 KB
72%
A$3/mo
Optional
static.cdn-website.com
static.cdn-website.com
Other
125ms
4 KB
—
A$2/mo
Optional
static.cdn-website.com
static.cdn-website.com
Other
114ms
31 KB
—
A$2/mo
Optional
static.cdn-website.com
static.cdn-website.com
Other
67ms
20 KB
—
A$1/mo
Optional
d32hwlnfiv2gyn.cloudfront.net
d32hwlnfiv2gyn.cloudfront.net
Other
66ms
18 KB
—
A$1/mo
Optional
www.passionfish.com.au
Other
Costly
Execution838ms
Transfer31 KB
Monthly CostA$14/mo
Unattributable
Other
Costly
Execution293ms
Transfer0 KB
Monthly CostA$5/mo
Google Tag Manager
Tag Manager
Costly
Execution206ms
Transfer169 KB
Unused41%
Monthly CostA$4/mo
static.cdn-website.com
Other
Optional
Execution148ms
Transfer96 KB
Unused72%
Monthly CostA$3/mo
static.cdn-website.com
Other
Optional
Execution125ms
Transfer4 KB
Monthly CostA$2/mo
static.cdn-website.com
Other
Optional
Execution114ms
Transfer31 KB
Monthly CostA$2/mo
static.cdn-website.com
Other
Optional
Execution67ms
Transfer20 KB
Monthly CostA$1/mo
d32hwlnfiv2gyn.cloudfront.net
Other
Optional
Execution66ms
Transfer18 KB
Monthly CostA$1/mo
These scripts may cost more than they're worth
www.passionfish.com.au adds 838ms and costs ~A$14/month
Unattributable adds 293ms and costs ~A$5/month
Google Tag Manager adds 206ms and costs ~A$4/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.passionfish.com.au takes 838ms 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 293ms 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 206ms 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
72% of static.cdn-website.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.