Skip to content
https://lunahub.ca

Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
1
REVIEW
9
PASS
13
INFO
3

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

Mobile Desktop
72
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
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.

1.91 s

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

10.02 s

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

32 ms

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

0.001

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

3.74 s

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

10.03 s

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
26
13 PASS 9 REVIEW 1 FIX
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.
Info::
Last-Modified header present

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Page Weight Budget
1.5 MB transferred, 11 requests
REVIEW
1.5 MB transferred, 11 requests
Info::
Page weighs 1.7 MB (1.5 MB transferred)
Warning::
Images are 1.5 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.5 MB
Info::
11 HTTP requests
Info::
Estimated 0.32 g CO2 per page load
1.5 MB / 2.4 MB budget
1.5 MB transferred
11 requests
0.32 g CO2 per page load
Images 1.5 MiB 97%
Fonts 23.9 KiB 2%
CSS 13.1 KiB 1%
HTML 9.6 KiB 1%
JavaScript 2.3 KiB 0%
Other 241 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

B
Image Optimization
4 images, 0 KB saveable
REVIEW
4 images, 0 KB saveable
Info::
All images are well-optimized
4 images 1.5 MB
0 oversized -0 KB
4 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
609ms total JS execution
REVIEW
609ms total JS execution
Warning::
https://lunahub.ca/: 394ms CPU time
Info::
Unattributable: 215ms CPU time

Main Thread Breakdown

Other 48% Style & Layout 35% Rendering 8% Script Evaluation 6%
ScriptTotalScriptingParse/CompileParty
https://lunahub.ca/394ms22ms3ms1st
Unattributable215ms6ms0ms1st
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
Document Compression
Document response uses gzip; brotli would be ~20% smaller
REVIEW
Document response uses gzip; brotli would be ~20% smaller
Info::
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
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.
C
Page Weight Inventory
Action
11 resources · 1.5 MB · 0 KB savings available
REVIEW
11 resources · 1.5 MB · 0 KB savings available
Warning::
Page weight 1.5 MB exceeds 1 MB target by 555 KB
Got: 1.5 MB Expected: ≤ 1 MB
Info::
2 third-party resources (2% of weight)
Info::
3 resources over 200KB
11 resources · 1.5 MiB · 2 third-party 555.5 KiB over 1MB target
Image 97% · 1.5 MiB
Font 2% · 23.9 KiB
CSS 1% · 13.1 KiB
Document 1% · 9.8 KiB
JavaScript 0% · 2.3 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
2% third-party, 0 ms blocking
PASS
2% third-party, 0 ms blocking
Info::
Third-party code accounts for 2% of page weight (25.1 KiB of 1.5 MiB)
Info::
Third-party blocking time is low (0 ms)
98%
First-party Third-party
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
1 fonts (24 KB)
PASS
1 fonts (24 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

24 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 1.9 s LCP 10.0 shttps://fonts.gstatic.com/s/manrope/v23/xn7gYHE41ni1AdIRggexSvfedN4.woff2xn7gYHE41ni1AdIRggexSvf... https://fonts.gstatic.com/s/manrope/v23/xn7gYHE41ni1AdIRggexSvfedN4.woff2 — 23.9 KiB — 140 ms — font-display: swap
xn7gYHE41ni1AdIRggexSvf... woff2 swap
Size 24 KB
Load time 140 ms
Start 1.9 s
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
1 scripts, 0 KB unused
PASS
1 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://lunahub.ca/assets/js/site.js2 KB—✓1st
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: User-Agent
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::
`Last-Modified` present -- timestamp-based conditional GET supported
Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.
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::
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.
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Asset Compression
No text asset hosts to measure
INFO
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall
11 requests over 2637ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 1.9 s LCP 10.0 shttps://lunahub.ca// https://lunahub.ca/ — 200 — 5.5 KiB — 163 ms — h2https://lunahub.ca/z0f76a1d14fd21a8fb5fd0d03e0fdc3d3cedae52f?wsidchk=10250899&pdata=https%253A%252F%252Flunahub.ca&id=7fa3b767c460b54a2be4d49030b349c7&ts=1794520059&cttl=0/z0f76a1d14fd21a8fb5fd0d03e0fdc3d3c... https://lunahub.ca/z0f76a1d14fd21a8fb5fd0d03e0fdc3d3cedae52f?wsidchk=10250899&pdata=https%253A%252F%252Flunahub.ca&id=7fa3b767c460b54a2be4d49030b349c7&ts=1794520059&cttl=0 — 302 — 241 B — 116 ms — h2https://lunahub.ca// https://lunahub.ca/ — 200 — 4.0 KiB — 127 ms — h2https://lunahub.ca/assets/css/site.css/assets/css/site.css https://lunahub.ca/assets/css/site.css — 200 — 11.9 KiB — 263 ms — h2https://lunahub.ca/assets/images/lunahub-logo-light.png/assets/images/lunahub-logo-light.p... https://lunahub.ca/assets/images/lunahub-logo-light.png — 200 — 80.1 KiB — 304 ms — h2https://lunahub.ca/assets/images/unconventional-egg-bulb.png/assets/images/unconventional-egg-b... https://lunahub.ca/assets/images/unconventional-egg-bulb.png — 200 — 528.2 KiB — 236 ms — h2https://lunahub.ca/assets/images/storytelling-typewriter.png/assets/images/storytelling-typewri... https://lunahub.ca/assets/images/storytelling-typewriter.png — 200 — 560.2 KiB — 251 ms — h2https://lunahub.ca/assets/js/site.js/assets/js/site.js https://lunahub.ca/assets/js/site.js — 200 — 2.3 KiB — 124 ms — h2https://fonts.googleapis.com/css2?family=Manrope:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400;1,500;1,600;1,700;1,800&display=swapfonts.googleapis.com/css2?family=Ma... https://fonts.googleapis.com/css2?family=Manrope:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400;1,500;1,600;1,700;1,800&display=swap — 200 — 1.2 KiB — 159 ms — h2https://lunahub.ca/assets/images/lunahub-homepage-background.jpg/assets/images/lunahub-homepage-bac... https://lunahub.ca/assets/images/lunahub-homepage-background.jpg — 200 — 361.9 KiB — 762 ms — h2https://fonts.gstatic.com/s/manrope/v23/xn7gYHE41ni1AdIRggexSvfedN4.woff2fonts.gstatic.com/s/manrope/v23/xn7... https://fonts.gstatic.com/s/manrope/v23/xn7gYHE41ni1AdIRggexSvfedN4.woff2 — 200 — 23.9 KiB — 140 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
4 images, 3698 KB total, 3467 KB wasted
INFO

Image Optimization Audit

Total Images

4

Total Size

3698 KB

Oversized

3

Wasted

3467 KB

4 missing dimensions 3 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback