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Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
92
GRADE
A
FIX
1
REVIEW
4
PASS
15
INFO
2

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.
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.

654 ms

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

654 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.

0.001

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

654 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.

654 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
22
15 PASS 4 REVIEW 1 FIX
D
Third-Party Impact
Action
91% third-party, 0 ms blocking
FIX
91% third-party, 0 ms blocking
Warning::
Third-party code accounts for 91% of page weight (152.2 KiB of 167.9 KiB)
Info::
Third-party blocking time is low (0 ms)
91%
First-party Third-party
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
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
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
168 KB transferred, 11 requests
PASS
168 KB transferred, 11 requests
Info::
Page weighs 309 KB (168 KB transferred)
Info::
11 HTTP requests
Info::
Estimated 0.03 g CO2 per page load
168 KB / 2.4 MB budget
168 KB transferred
11 requests
0.03 g CO2 per page load
Fonts 99.8 KiB 59%
JavaScript 53.9 KiB 32%
CSS 7.4 KiB 4%
HTML 6.2 KiB 4%
Other 585 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
322ms total JS execution
PASS
322ms total JS execution
Info::
https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/gsap...: 181ms CPU time
Info::
https://arshad-developer-portfolio.netlify.app/: 141ms CPU time
Warning::
Third-party scripts: 181ms (56% of total)

Main Thread Breakdown

Other 35% Style & Layout 31% Script Evaluation 18% Rendering 14%
ScriptTotalScriptingParse/CompileParty
https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/gsap.min.js181ms45ms1ms3rd
https://arshad-developer-portfolio.netlify.app/141ms1ms0ms1st
A+
Font Loading
3 fonts (100 KB)
PASS
3 fonts (100 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

100 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 654 ms LCP 654 mshttps://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2UcC73FwrK3iLTeHuS_nVMrM... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 47.3 KiB — 83 ms — font-display: swaphttps://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4C_k3HqU.woff2V8mDoQDjQSkFtoMM3T6r8E7... https://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4C_k3HqU.woff2 — 21.8 KiB — 77 ms — font-display: swaphttps://fonts.gstatic.com/s/jetbrainsmono/v24/tDbv2o-flEEny0FZhsfKu5WU4zr3E_BX0PnT8RD8yKwBNntkaToggR7BYRbKPxDcwgknk-4.woff2tDbv2o-flEEny0FZhsfKu5W... https://fonts.gstatic.com/s/jetbrainsmono/v24/tDbv2o-flEEny0FZhsfKu5WU4zr3E_BX0PnT8RD8yKwBNntkaToggR7BYRbKPxDcwgknk-4.woff2 — 30.6 KiB — 75 ms — font-display: swap
UcC73FwrK3iLTeHuS_nVMrM... woff2 swap
Size 47 KB
Load time 83 ms
Start 261 ms
Risk FOUT — text flashes from fallback to web font
V8mDoQDjQSkFtoMM3T6r8E7... woff2 swap
Size 22 KB
Load time 77 ms
Start 261 ms
Risk FOUT — text flashes from fallback to web font
tDbv2o-flEEny0FZhsfKu5W... woff2 swap
Size 31 KB
Load time 75 ms
Start 261 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
4 scripts, 0 KB unused
PASS
4 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/gsap.min.js29 KB—✓3rd
https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/ScrollTrigger.min.js18 KB—✓3rd
https://cdn.jsdelivr.net/npm/@studio-freight/lenis@1.0.42/dist/lenis.min.js4 KB—✓3rd
https://arshad-developer-portfolio.netlify.app/js/main.js3 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+
Document Compression
Document response uses brotli
PASS
Document 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+
Asset Compression
All 1 asset host use brotli
PASS
All 1 asset host use brotli
Info::
cdn.jsdelivr.net serves assets with brotli (assets: 3)
Got: cdn.jsdelivr.net (application/javascript)
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
3 server-response signal(s) detected
PASS
3 server-response signal(s) detected
Info::
`Cache-Status` header present (RFC 9211): "Netlify Edge"; fwd=miss; fwd-status=200; stored
The page returns a `Cache-Status` header -- the standardized way for CDNs and caches to communicate per-hop cache state to debugging tools. Format: `Cache-Status: cdn-name; hit; ttl=300` (or `; fwd=miss` / `; fwd=stale`). Standard alternative to vendor-specific `X-Cache` patterns each CDN had historically. Cloudflare, Fastly, and Akamai all support emitting it.
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::
`ETag` present -- conditional GET supported
A
Page Weight Inventory
11 resources · 168 KB · 0 KB savings available
PASS
11 resources · 168 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 168 KB
Warning::
7 third-party resources (91% of weight)
11 resources · 167.9 KiB · 7 third-party Within 1MB page-weight target
Font 59% · 99.8 KiB
JavaScript 32% · 53.9 KiB
CSS 4% · 7.4 KiB
Document 4% · 6.2 KiB
Image 0% · 585 B
Network Waterfall
11 requests over 406ms
INFO
0 ms 200 ms 400 ms 600 ms FCP 654 ms LCP 654 mshttps://arshad-developer-portfolio.netlify.app// https://arshad-developer-portfolio.netlify.app/ — 200 — 6.2 KiB — 77 ms — h2https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swapfonts.googleapis.com/css2?family=Sp... https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap — 200 — 1.5 KiB — 97 ms — h2https://arshad-developer-portfolio.netlify.app/css/main.css/css/main.css https://arshad-developer-portfolio.netlify.app/css/main.css — 200 — 5.9 KiB — 30 ms — h2https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/gsap.min.jscdn.jsdelivr.net/npm/gsap@3.12.5/di... https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/gsap.min.js — 200 — 29.2 KiB — 65 ms — h2https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/ScrollTrigger.min.jscdn.jsdelivr.net/npm/gsap@3.12.5/di... https://cdn.jsdelivr.net/npm/gsap@3.12.5/dist/ScrollTrigger.min.js — 200 — 18.0 KiB — 65 ms — h2https://cdn.jsdelivr.net/npm/@studio-freight/lenis@1.0.42/dist/lenis.min.jscdn.jsdelivr.net/npm/@studio-freigh... https://cdn.jsdelivr.net/npm/@studio-freight/lenis@1.0.42/dist/lenis.min.js — 200 — 3.7 KiB — 64 ms — h2https://arshad-developer-portfolio.netlify.app/js/main.js/js/main.js https://arshad-developer-portfolio.netlify.app/js/main.js — 200 — 3.0 KiB — 28 ms — h2https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2fonts.gstatic.com/s/inter/v20/UcC73... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 200 — 47.3 KiB — 83 ms — h3https://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4C_k3HqU.woff2fonts.gstatic.com/s/spacegrotesk/v2... https://fonts.gstatic.com/s/spacegrotesk/v22/V8mDoQDjQSkFtoMM3T6r8E7mPbF4C_k3HqU.woff2 — 200 — 21.8 KiB — 77 ms — h3https://fonts.gstatic.com/s/jetbrainsmono/v24/tDbv2o-flEEny0FZhsfKu5WU4zr3E_BX0PnT8RD8yKwBNntkaToggR7BYRbKPxDcwgknk-4.woff2fonts.gstatic.com/s/jetbrainsmono/v... https://fonts.gstatic.com/s/jetbrainsmono/v24/tDbv2o-flEEny0FZhsfKu5WU4zr3E_BX0PnT8RD8yKwBNntkaToggR7BYRbKPxDcwgknk-4.woff2 — 200 — 30.6 KiB — 75 ms — h3https://arshad-developer-portfolio.netlify.app/assets/favicon.svg/assets/favicon.svg https://arshad-developer-portfolio.netlify.app/assets/favicon.svg — 200 — 585 B — 26 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
56% of JavaScript execution is third-party
First-party Third-party 181ms · 29KB · $2/mo
jsDelivr
CDN
Optional
Execution 181ms
Transfer 29 KB
Monthly Cost $2/mo

56% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

How third-party costs are calculated

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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