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Performance

· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
1
REVIEW
6
PASS
16
INFO
4

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.
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.

1.29 s

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

1.48 s

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

106 ms

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

0.000

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

1.29 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.

3.54 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
27
16 PASS 6 REVIEW 1 FIX
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store
Info::
ETag present — enables conditional (304) responses
Cache-Control

no-store

DirectiveValueMeaning
no-store—Never cache this response
B
Third-Party Impact
57% third-party, 0 ms blocking
REVIEW
57% third-party, 0 ms blocking
Warning::
Third-party code accounts for 57% of page weight (190.9 KiB of 333.6 KiB)
Info::
Third-party blocking time is low (0 ms)
43%
57%
First-party Third-party
B
JS Execution Cost
908ms total JS execution
REVIEW
908ms total JS execution
Warning::
https://www.googletagmanager.com/gtag/js?id=G-746N...: 284ms CPU time
Warning::
Unattributable: 255ms CPU time
Info::
https://coduf.com/: 236ms CPU time
Info::
https://coduf.com/assets/vendor-IIVtdmKT.js: 133ms CPU time
Info::
Third-party scripts: 284ms (31% of total)

Main Thread Breakdown

Script Evaluation 40% Other 32% Style & Layout 15% Script Parsing & Compilation 5% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.googletagmanager.com/gtag/js?id=G-746NB401PH284ms226ms42ms3rd
Unattributable255ms7ms0ms1st
https://coduf.com/236ms10ms2ms1st
https://coduf.com/assets/vendor-IIVtdmKT.js133ms122ms1ms1st
B
JS Bundles
3 scripts, 115 KB unused
REVIEW
3 scripts, 115 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-746N...: 74 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://coduf.com/assets/vendor-IIVtdmKT.js: 41 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 115 KB
115 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-746NB401PH178 KB74 KB (42%)✓3rd
https://coduf.com/assets/vendor-IIVtdmKT.js83 KB41 KB (50%)✓1st
https://coduf.com/assets/index-Dtysm3xu.js22 KB—✓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

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.
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
334 KB transferred, 21 requests
PASS
334 KB transferred, 21 requests
Info::
Page weighs 983 KB (334 KB transferred)
Info::
21 HTTP requests
Info::
Estimated 0.07 g CO2 per page load
334 KB / 2.4 MB budget
334 KB transferred
21 requests
0.07 g CO2 per page load
JavaScript 283.0 KiB 85%
Images 24.0 KiB 7%
CSS 13.5 KiB 4%
HTML 10.1 KiB 3%
Other 1.6 KiB 0%
Other 834 B 0%
Other 543 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
5 images, 0 KB saveable
PASS
5 images, 0 KB saveable
Info::
All images are well-optimized
5 images 16 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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+
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 uses no-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-store
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::
`ETag` present -- conditional GET supported
A
Page Weight Inventory
21 resources · 334 KB · 115 KB savings available
PASS
21 resources · 334 KB · 115 KB savings available
Info::
Within 1MB page-weight target
Got: 334 KB
Info::
~115 KB of savings available
Warning::
11 third-party resources (57% of weight)
21 resources · 333.6 KiB · 11 third-party Within 1MB page-weight target
JavaScript 85% · 283.0 KiB
Image 7% · 24.8 KiB
CSS 4% · 13.5 KiB
Document 3% · 10.1 KiB
Other 1% · 2.1 KiB

~115.1 KiB of savings available

Remove unused JavaScript: 115.1 KiB
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
No render-blocking JS or document.write usage detected
PASS
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues detected
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
21 requests over 895ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 1.3 s LCP 1.5 shttps://coduf.com// https://coduf.com/ — 200 — 10.1 KiB — 215 ms — h2https://coduf.com/assets/index-Dtysm3xu.js/assets/index-Dtysm3xu.js https://coduf.com/assets/index-Dtysm3xu.js — 200 — 22.1 KiB — 147 ms — h2https://coduf.com/assets/index-CVqTlJwv.css/assets/index-CVqTlJwv.css https://coduf.com/assets/index-CVqTlJwv.css — 200 — 13.5 KiB — 85 ms — h2https://coduf.com/images/desktop/workspace-640.webp/images/desktop/workspace-640.webp https://coduf.com/images/desktop/workspace-640.webp — 200 — 4.3 KiB — 82 ms — h2https://coduf.com/assets/vendor-IIVtdmKT.js/assets/vendor-IIVtdmKT.js https://coduf.com/assets/vendor-IIVtdmKT.js — 200 — 82.5 KiB — 204 ms — h2https://coduf.com/site.webmanifest/site.webmanifest https://coduf.com/site.webmanifest — 200 — 1.6 KiB — 200 ms — h2https://coduf.com/coduf-icon-v2.svg/coduf-icon-v2.svg https://coduf.com/coduf-icon-v2.svg — 200 — 1.0 KiB — 117 ms — h2data:image/svg+xml,%3csvg%20fill='currentColor'%20fill-rule='evenodd'%20height='1em'%20style='flex:…data:image/svg+xml,%3csvg%20fill='c... data:image/svg+xml,%3csvg%20fill='currentColor'%20fill-rule='evenodd'%20height='1em'%20style='flex:… — 200 — 1.6 KiB — 36 ms — datadata:image/svg+xml,%3csvg%20fill='currentColor'%20fill-rule='evenodd'%20height='1em'%20style='flex:…data:image/svg+xml,%3csvg%20fill='c... data:image/svg+xml,%3csvg%20fill='currentColor'%20fill-rule='evenodd'%20height='1em'%20style='flex:… — 200 — 368 B — 39 ms — datadata:image/svg+xml,%3csvg%20height='1em'%20style='flex:none;line-height:1'%20viewBox='0%200%2024%20…data:image/svg+xml,%3csvg%20height=... data:image/svg+xml,%3csvg%20height='1em'%20style='flex:none;line-height:1'%20viewBox='0%200%2024%20… — 200 — 2.1 KiB — 40 ms — datadata:image/svg+xml,%3csvg%20height='1em'%20style='flex:none;line-height:1'%20viewBox='0%200%2024%20…data:image/svg+xml,%3csvg%20height=... data:image/svg+xml,%3csvg%20height='1em'%20style='flex:none;line-height:1'%20viewBox='0%200%2024%20… — 200 — 2.8 KiB — 41 ms — datadata:image/svg+xml,%3csvg%20fill='currentColor'%20fill-rule='evenodd'%20height='1em'%20style='flex:…data:image/svg+xml,%3csvg%20fill='c... data:image/svg+xml,%3csvg%20fill='currentColor'%20fill-rule='evenodd'%20height='1em'%20style='flex:… — 200 — 372 B — 43 ms — datadata:image/svg+xml,%3csvg%20fill='currentColor'%20fill-rule='evenodd'%20height='1em'%20style='flex:…data:image/svg+xml,%3csvg%20fill='c... data:image/svg+xml,%3csvg%20fill='currentColor'%20fill-rule='evenodd'%20height='1em'%20style='flex:… — 200 — 568 B — 44 ms — datadata:image/svg+xml,%3csvg%20height='1em'%20style='flex:none;line-height:1'%20viewBox='0%200%2024%20…data:image/svg+xml,%3csvg%20height=... data:image/svg+xml,%3csvg%20height='1em'%20style='flex:none;line-height:1'%20viewBox='0%200%2024%20… — 200 — 655 B — 45 ms — datadata:image/svg+xml,%3csvg%20height='1em'%20style='flex:none;line-height:1'%20viewBox='0%200%2024%20…data:image/svg+xml,%3csvg%20height=... data:image/svg+xml,%3csvg%20height='1em'%20style='flex:none;line-height:1'%20viewBox='0%200%2024%20… — 200 — 357 B — 47 ms — datadata:image/svg+xml,%3csvg%20fill='currentColor'%20fill-rule='evenodd'%20height='1em'%20style='flex:…data:image/svg+xml,%3csvg%20fill='c... data:image/svg+xml,%3csvg%20fill='currentColor'%20fill-rule='evenodd'%20height='1em'%20style='flex:… — 200 — 3.2 KiB — 48 ms — datahttps://coduf.com/images/desktop/sidebar-640.webp/images/desktop/sidebar-640.webp https://coduf.com/images/desktop/sidebar-640.webp — 200 — 6.7 KiB — 83 ms — h2https://coduf.com/coduf-icon-v2.svg/coduf-icon-v2.svg https://coduf.com/coduf-icon-v2.svg — 200 — 417 B — 71 ms — h2https://coduf.com/coduf-icon-v2.svg/coduf-icon-v2.svg https://coduf.com/coduf-icon-v2.svg — 200 — 417 B — 133 ms — h2https://www.googletagmanager.com/gtag/js?id=G-746NB401PHwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-746NB401PH — 200 — 178.3 KiB — 214 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-746NB401PH&gtm=45je6b21v9283538298za208zd9283538298xf1&_p=1793782168197&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&cid=915787488.1793782169&frm=0&ngs=1&pscdl=noapi&rcb=4&sr=412x823&uaa=&uab=64&uafvl=Not%253AA-Brand%3B8.0.0.0%7CChromium%3B156.0.8078.79&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=115616985~115938465~115938469~118897920~118897930~120213116~120385423~120412526~120420414~120469145~120469153~121246026~121246034~123691370~123814946&sid=1793782168&sct=1&seg=0&dl=https%3A%2F%2Fcoduf.com%2F&dt=Coduf%20%E2%80%94%20Give%20your%20ideas%20shape.&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&ep.anonymize_ip=true&tfd=806region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-746NB401PH&gtm=45je6b21v9283538298za208zd9283538298xf1&_p=1793782168197&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&cid=915787488.1793782169&frm=0&ngs=1&pscdl=noapi&rcb=4&sr=412x823&uaa=&uab=64&uafvl=Not%253AA-Brand%3B8.0.0.0%7CChromium%3B156.0.8078.79&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=115616985~115938465~115938469~118897920~118897930~120213116~120385423~120412526~120420414~120469145~120469153~121246026~121246034~123691370~123814946&sid=1793782168&sct=1&seg=0&dl=https%3A%2F%2Fcoduf.com%2F&dt=Coduf%20%E2%80%94%20Give%20your%20ideas%20shape.&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&ep.anonymize_ip=true&tfd=806 — 204 — 543 B — 88 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
31% of JavaScript execution is third-party
First-party Third-party 284ms · 178KB · ₺11/mo
Google Tag Manager
Tag Manager
Costly
Execution 284ms
Transfer 178 KB
Unused 42%
Monthly Cost ₺11/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 284ms and costs ~₺11/month

Google Tag Manager takes 284ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

Image Optimization
22 images, 19 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

22

Total Size

19 KB

18 missing dimensions 11 missing lazy loading
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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