Skip to content
https://cedar.sauna.equipment/headrest/

Performance

· 20 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
2
REVIEW
3
PASS
14
INFO
1

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
98
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

876 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

876 ms

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.005

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

876 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

876 ms

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
20
14 PASS 3 REVIEW 2 FIX
D
Third-Party Impact
Action
78% third-party, 0 ms blocking
FIX
78% third-party, 0 ms blocking
Warning::
Third-party code accounts for 78% of page weight (69.7 KiB of 89.3 KiB)
Info::
Third-party blocking time is low (0 ms)
22%
78%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
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
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
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
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
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::
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.
A+
Page Weight Budget
89 KB transferred, 5 requests
PASS
89 KB transferred, 5 requests
Info::
Page weighs 133 KB (89 KB transferred)
Info::
5 HTTP requests
Info::
Estimated 0.02 g CO2 per page load
89 KB / 2.4 MB budget
89 KB transferred
5 requests
0.02 g CO2 per page load
Fonts 68.4 KiB 77%
HTML 19.3 KiB 22%
CSS 1.3 KiB 1%
Other 289 B 0%
0 2.4 MB 4.9 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+
Image Optimization
No images on this page
PASS
No images on this page
Info::
No images on this page
0 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
91ms total JS execution
PASS
91ms total JS execution
Info::
https://cedar.sauna.equipment/headrest/: 91ms CPU time

Main Thread Breakdown

Style & Layout 54% Other 35% Rendering 5% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://cedar.sauna.equipment/headrest/91ms1ms0ms1st
A+
Font Loading
2 fonts (68 KB)
PASS
2 fonts (68 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

68 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 876 ms LCP 876 mshttps://fonts.gstatic.com/s/outfit/v15/QGYvz_MVcBeNP4NJtEtqUYLknw.woff2QGYvz_MVcBeNP4NJtEtqUYL... https://fonts.gstatic.com/s/outfit/v15/QGYvz_MVcBeNP4NJtEtqUYLknw.woff2 — 31.5 KiB — 45 ms — font-display: swaphttps://fonts.gstatic.com/s/cormorantgaramond/v21/co3bmX5slCNuHLi8bLeY9MK7whWMhyjYqXtKky2F7g.woff2co3bmX5slCNuHLi8bLeY9MK... https://fonts.gstatic.com/s/cormorantgaramond/v21/co3bmX5slCNuHLi8bLeY9MK7whWMhyjYqXtKky2F7g.woff2 — 36.9 KiB — 45 ms — font-display: swap
QGYvz_MVcBeNP4NJtEtqUYL... woff2 swap
Size 32 KB
Load time 45 ms
Start 239 ms
Risk FOUT — text flashes from fallback to web font
co3bmX5slCNuHLi8bLeY9MK... woff2 swap
Size 37 KB
Load time 45 ms
Start 239 ms
Risk FOUT — 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+
JS Bundles
No JavaScript
PASS
No JavaScript
Info::
No JavaScript bundles
No JavaScript files loaded.
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+
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
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::
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
Page Weight Inventory
5 resources · 89 KB · 0 KB savings available
PASS
5 resources · 89 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 89 KB
Warning::
3 third-party resources (78% of weight)
5 resources · 89.3 KiB · 3 third-party Within 1MB page-weight target
Font 77% · 68.4 KiB
Document 22% · 19.6 KiB
CSS 1% · 1.3 KiB
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Combell

Network Waterfall
5 requests over 342ms
INFO
0 ms 200 ms 400 ms 600 ms 800 ms FCP 876 ms LCP 876 mshttps://cedar.sauna.equipment/headrest//headrest/ https://cedar.sauna.equipment/headrest/ — 200 — 19.3 KiB — 115 ms — h2https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;1,400;1,500&family=Outfit:wght@300;400;500;600&display=swapfonts.googleapis.com/css2?family=Co... https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;1,400;1,500&family=Outfit:wght@300;400;500;600&display=swap — 200 — 1.3 KiB — 79 ms — h2https://fonts.gstatic.com/s/outfit/v15/QGYvz_MVcBeNP4NJtEtqUYLknw.woff2fonts.gstatic.com/s/outfit/v15/QGYv... https://fonts.gstatic.com/s/outfit/v15/QGYvz_MVcBeNP4NJtEtqUYLknw.woff2 — 200 — 31.5 KiB — 45 ms — h3https://fonts.gstatic.com/s/cormorantgaramond/v21/co3bmX5slCNuHLi8bLeY9MK7whWMhyjYqXtKky2F7g.woff2fonts.gstatic.com/s/cormorantgaramo... https://fonts.gstatic.com/s/cormorantgaramond/v21/co3bmX5slCNuHLi8bLeY9MK7whWMhyjYqXtKky2F7g.woff2 — 200 — 36.9 KiB — 45 ms — h3https://cedar.sauna.equipment/favicon.ico/favicon.ico https://cedar.sauna.equipment/favicon.ico — 404 — 289 B — 32 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback