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https://afafflat.vercel.app

Performance

· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
92
GRADE
A
FIX
0
REVIEW
7
PASS
12
INFO
2

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

Mobile Desktop
99
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.
82
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.

647 ms

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

647 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.

0.041

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

647 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.

647 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
21
12 PASS 7 REVIEW
B
Third-Party Impact
53% third-party, 0 ms blocking
REVIEW
53% third-party, 0 ms blocking
Warning::
Third-party code accounts for 53% of page weight (181.8 KiB of 343.6 KiB)
Info::
Third-party blocking time is low (0 ms)
47%
53%
First-party Third-party
B
JS Bundles
1 scripts, 106 KB unused
REVIEW
1 scripts, 106 KB unused
Warning::
https://afafflat.vercel.app/assets/index-CJDElzE3....: 106 KB unused (71%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 106 KB
106 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://afafflat.vercel.app/assets/index-CJDElzE3.js153 KB106 KB (71%)✓1st

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::
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
Document Compression
Action
Document response served uncompressed
REVIEW
Document response served uncompressed
Info::
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::
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

B
HTTP Caching
public, max-age=0, must-revalidate
REVIEW
public, max-age=0, must-revalidate
Info::
Cache-Control header is set
Got: public, max-age=0, must-revalidate
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

public, max-age=0, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
A+
Page Weight Budget
344 KB transferred, 9 requests
PASS
344 KB transferred, 9 requests
Info::
Page weighs 793 KB (344 KB transferred)
Info::
9 HTTP requests
Info::
Estimated 0.07 g CO2 per page load
344 KB / 2.4 MB budget
344 KB transferred
9 requests
0.07 g CO2 per page load
Fonts 180.5 KiB 53%
JavaScript 152.9 KiB 44%
CSS 7.7 KiB 2%
Other 1.5 KiB 0%
HTML 1.1 KiB 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
73ms total JS execution
PASS
73ms total JS execution
Info::
https://afafflat.vercel.app/: 73ms CPU time

Main Thread Breakdown

Style & Layout 41% Other 32% Script Evaluation 21% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://afafflat.vercel.app/73ms1ms0ms1st
A+
Font Loading
4 fonts (180 KB)
PASS
4 fonts (180 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

180 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 647 ms LCP 647 mshttps://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscQyyS8p4_RHH1.woff2SLXVc1nY6HkvangtZmpQdkh... https://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscQyyS8p4_RHH1.woff2 — 30.0 KiB — 85 ms — font-display: swaphttps://fonts.gstatic.com/s/amiri/v30/J7acnpd8CGxBHp2VkaY6zp5gGDAbnCA.woff2J7acnpd8CGxBHp2VkaY6zp5... https://fonts.gstatic.com/s/amiri/v30/J7acnpd8CGxBHp2VkaY6zp5gGDAbnCA.woff2 — 97.7 KiB — 118 ms — font-display: swaphttps://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscRiyS8p4_RA.woff2SLXVc1nY6HkvangtZmpQdkh... https://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscRiyS8p4_RA.woff2 — 32.9 KiB — 95 ms — font-display: swaphttps://fonts.gstatic.com/s/amiri/v30/J7acnpd8CGxBHp2VkaY_zp5gGDAb.woff2J7acnpd8CGxBHp2VkaY_zp5... https://fonts.gstatic.com/s/amiri/v30/J7acnpd8CGxBHp2VkaY_zp5gGDAb.woff2 — 19.8 KiB — 90 ms — font-display: swap
SLXVc1nY6HkvangtZmpQdkh... woff2 swap
Size 30 KB
Load time 85 ms
Start 290 ms
Risk FOUT — text flashes from fallback to web font
J7acnpd8CGxBHp2VkaY6zp5... woff2 swap
Size 98 KB
Load time 118 ms
Start 290 ms
Risk FOUT — text flashes from fallback to web font
SLXVc1nY6HkvangtZmpQdkh... woff2 swap
Size 33 KB
Load time 95 ms
Start 291 ms
Risk FOUT — text flashes from fallback to web font
J7acnpd8CGxBHp2VkaY_zp5... woff2 swap
Size 20 KB
Load time 90 ms
Start 291 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+
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+
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: public, max-age=0, must-revalidate
A+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
Info::
Both `ETag` and `Last-Modified` present -- efficient revalidation supported
The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).
A
Page Weight Inventory
9 resources · 344 KB · 106 KB savings available
PASS
9 resources · 344 KB · 106 KB savings available
Info::
Within 1MB page-weight target
Got: 344 KB
Info::
~106 KB of savings available
Warning::
5 third-party resources (53% of weight)
9 resources · 343.6 KiB · 5 third-party Within 1MB page-weight target
Font 53% · 180.5 KiB
JavaScript 44% · 152.9 KiB
CSS 2% · 7.7 KiB
Image 0% · 1.5 KiB
Document 0% · 1.1 KiB

~106.2 KiB of savings available

Remove unused JavaScript: 106.2 KiB
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
9 requests over 409ms
INFO
0 ms 200 ms 400 ms 600 ms FCP 647 ms LCP 647 mshttps://afafflat.vercel.app// https://afafflat.vercel.app/ — 200 — 1.1 KiB — 60 ms — h2https://fonts.googleapis.com/css2?family=Cairo:wght@400;500;600;700;800&family=Amiri:wght@400;700&display=swapfonts.googleapis.com/css2?family=Ca... https://fonts.googleapis.com/css2?family=Cairo:wght@400;500;600;700;800&family=Amiri:wght@400;700&display=swap — 200 — 1.3 KiB — 136 ms — h2https://afafflat.vercel.app/assets/index-CJDElzE3.js/assets/index-CJDElzE3.js https://afafflat.vercel.app/assets/index-CJDElzE3.js — 200 — 152.9 KiB — 42 ms — h2https://afafflat.vercel.app/assets/index-DeAKgUCS.css/assets/index-DeAKgUCS.css https://afafflat.vercel.app/assets/index-DeAKgUCS.css — 200 — 6.4 KiB — 24 ms — h2https://afafflat.vercel.app/favicon.svg/favicon.svg https://afafflat.vercel.app/favicon.svg — 200 — 1.5 KiB — 22 ms — h2https://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscQyyS8p4_RHH1.woff2fonts.gstatic.com/s/cairo/v31/SLXVc... https://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscQyyS8p4_RHH1.woff2 — 200 — 30.0 KiB — 85 ms — h3https://fonts.gstatic.com/s/amiri/v30/J7acnpd8CGxBHp2VkaY6zp5gGDAbnCA.woff2fonts.gstatic.com/s/amiri/v30/J7acn... https://fonts.gstatic.com/s/amiri/v30/J7acnpd8CGxBHp2VkaY6zp5gGDAbnCA.woff2 — 200 — 97.7 KiB — 118 ms — h3https://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscRiyS8p4_RA.woff2fonts.gstatic.com/s/cairo/v31/SLXVc... https://fonts.gstatic.com/s/cairo/v31/SLXVc1nY6HkvangtZmpQdkhzfH5lkSscRiyS8p4_RA.woff2 — 200 — 32.9 KiB — 95 ms — h3https://fonts.gstatic.com/s/amiri/v30/J7acnpd8CGxBHp2VkaY_zp5gGDAb.woff2fonts.gstatic.com/s/amiri/v30/J7acn... https://fonts.gstatic.com/s/amiri/v30/J7acnpd8CGxBHp2VkaY_zp5gGDAb.woff2 — 200 — 19.8 KiB — 90 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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