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Performance

· 20 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
96
GRADE
A
FIX
1
REVIEW
4
PASS
14
INFO
1

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

Mobile Desktop
100
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
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.
92
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.

355 ms

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

383 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.

0.008

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

564 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.

383 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 4 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.

No Cache-Control header

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

B
Compression Algorithm
Main response uses gzip; brotli would be ~20% smaller
REVIEW
Main 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
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
117 KB transferred, 11 requests
PASS
117 KB transferred, 11 requests
Info::
Page weighs 151 KB (117 KB transferred)
Info::
11 HTTP requests
Info::
Estimated 0.02 g CO2 per page load
117 KB / 2.4 MB budget
117 KB transferred
11 requests
0.02 g CO2 per page load
Fonts 95.5 KiB 82%
CSS 7.4 KiB 6%
HTML 6.7 KiB 6%
Other 5.3 KiB 5%
JavaScript 1.2 KiB 1%
Other 689 B 1%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-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+
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
No JS execution data
PASS
No JS execution data
Info::
No significant JS execution detected

Main Thread Breakdown

Other 49% Style & Layout 35% Rendering 9% Script Evaluation 4%
A+
Font Loading
5 fonts (95 KB)
PASS
5 fonts (95 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

95 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 355 ms LCP 383 mshttps://strictmx.com/static/fonts/ibm-plex-sans-400.woff2ibm-plex-sans-400.woff2 https://strictmx.com/static/fonts/ibm-plex-sans-400.woff2 — 20.6 KiB — 209 ms — font-display: swaphttps://strictmx.com/static/fonts/ibm-plex-mono-400.woff2ibm-plex-mono-400.woff2 https://strictmx.com/static/fonts/ibm-plex-mono-400.woff2 — 17.2 KiB — 206 ms — font-display: swaphttps://strictmx.com/static/fonts/ibm-plex-sans-600.woff2ibm-plex-sans-600.woff2 https://strictmx.com/static/fonts/ibm-plex-sans-600.woff2 — 22.1 KiB — 212 ms — font-display: swaphttps://strictmx.com/static/fonts/ibm-plex-mono-600.woff2ibm-plex-mono-600.woff2 https://strictmx.com/static/fonts/ibm-plex-mono-600.woff2 — 17.8 KiB — 206 ms — font-display: swaphttps://strictmx.com/static/fonts/ibm-plex-mono-500.woff2ibm-plex-mono-500.woff2 https://strictmx.com/static/fonts/ibm-plex-mono-500.woff2 — 17.8 KiB — 137 ms — font-display: swap
ibm-plex-sans-400.woff2 woff2 swap
Size 21 KB
Load time 209 ms
Start 312 ms
Risk FOUT — text flashes from fallback to web font
ibm-plex-mono-400.woff2 woff2 swap
Size 17 KB
Load time 206 ms
Start 316 ms
Risk FOUT — text flashes from fallback to web font
ibm-plex-sans-600.woff2 woff2 swap
Size 22 KB
Load time 212 ms
Start 552 ms
Risk FOUT — text flashes from fallback to web font
ibm-plex-mono-600.woff2 woff2 swap
Size 18 KB
Load time 206 ms
Start 553 ms
Risk FOUT — text flashes from fallback to web font
ibm-plex-mono-500.woff2 woff2 swap
Size 18 KB
Load time 137 ms
Start 553 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
1 scripts, 0 KB unused
PASS
1 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://strictmx.com/static/theme.js1 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+
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
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
11 resources · 117 KB · 0 KB savings available
PASS
11 resources · 117 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 117 KB
11 resources · 116.7 KiB · 0 third-party Within 1MB page-weight target
Font 82% · 95.5 KiB
CSS 6% · 7.4 KiB
Document 6% · 6.7 KiB
Image 5% · 5.3 KiB
JavaScript 1% · 1.2 KiB
Other 1% · 689 B
Network Waterfall
11 requests over 879ms
INFO
0 ms 200 ms 400 ms 600 ms 800 ms FCP 355 ms LCP 383 mshttps://strictmx.com// https://strictmx.com/ — 200 — 6.7 KiB — 305 ms — h2https://strictmx.com/static/fonts/ibm-plex-sans-400.woff2/static/fonts/ibm-plex-sans-400.wof... https://strictmx.com/static/fonts/ibm-plex-sans-400.woff2 — 200 — 20.6 KiB — 209 ms — h2https://strictmx.com/static/app.css/static/app.css https://strictmx.com/static/app.css — 200 — 7.4 KiB — 207 ms — h2https://strictmx.com/static/theme.js/static/theme.js https://strictmx.com/static/theme.js — 200 — 1.2 KiB — 206 ms — h2https://strictmx.com/static/fonts/ibm-plex-mono-400.woff2/static/fonts/ibm-plex-mono-400.wof... https://strictmx.com/static/fonts/ibm-plex-mono-400.woff2 — 200 — 17.2 KiB — 206 ms — h2https://strictmx.com/static/fonts/ibm-plex-sans-600.woff2/static/fonts/ibm-plex-sans-600.wof... https://strictmx.com/static/fonts/ibm-plex-sans-600.woff2 — 200 — 22.1 KiB — 212 ms — h3https://strictmx.com/static/fonts/ibm-plex-mono-600.woff2/static/fonts/ibm-plex-mono-600.wof... https://strictmx.com/static/fonts/ibm-plex-mono-600.woff2 — 200 — 17.8 KiB — 206 ms — h3https://strictmx.com/static/fonts/ibm-plex-mono-500.woff2/static/fonts/ibm-plex-mono-500.wof... https://strictmx.com/static/fonts/ibm-plex-mono-500.woff2 — 200 — 17.8 KiB — 137 ms — h3https://strictmx.com/static/site.webmanifest/static/site.webmanifest https://strictmx.com/static/site.webmanifest — 200 — 689 B — 105 ms — h3https://strictmx.com/static/assets/favicon.svg/static/assets/favicon.svg https://strictmx.com/static/assets/favicon.svg — 200 — 665 B — 105 ms — h3https://strictmx.com/static/assets/icon-192.png/static/assets/icon-192.png https://strictmx.com/static/assets/icon-192.png — 200 — 4.7 KiB — 104 ms — h3
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.

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