Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Performance

Accessibility

Best Practices

100

SEO

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.64 s

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

2.35 s

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

712 ms

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

0.180

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

8.88 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.

3.17 s

Page Load Progression

1.2 s

2.5 s

3.7 s

5.0 s

6.2 s

7.5 s

8.7 s

9.9 s

Checks

16 PASS 5 REVIEW 2 FIX

JS Execution Cost

Action

3547ms total JS execution

FIX

3547ms total JS execution

https://doonkoob.ir/: 2315ms CPU time

Unattributable: 1231ms CPU time

Main Thread Breakdown

Other 63% Style & Layout 19% Rendering 9% Parse HTML & CSS 4%

Script	Total	Scripting	Parse/Compile	Party
https://doonkoob.ir/	2315ms	69ms	55ms	1st
Unattributable	1231ms	3ms	0ms	1st

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

Cache-Control: no-store prevents all caching

Intentional for dynamic content, but increases server load for every page view.

Got: private, no-cache, no-store, max-age=0, must-revalidate

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

private, no-cache, no-store, max-age=0, must-revalidate

Directive	Value	Meaning
private	—	Only browser cache, not CDN/proxy
no-cache	—	Cache but always revalidate first
no-store	—	Never cache this response
max-age	0	Cache for 0 seconds
must-revalidate	—	Must recheck with server after expiry

Page Weight Budget

Action

1.6 MB transferred, 40 requests

REVIEW

1.6 MB transferred, 40 requests

Page weighs 2.2 MB (1.6 MB transferred)

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

40 HTTP requests

Estimated 0.33 g CO2 per page load

1.6 MB transferred

40 requests

0.33 g CO2 per page load

Images 1.5 MiB 96%

HTML 70.7 KiB 4%

Other 1.4 KiB 0%

CSS 175 B 0%

JavaScript 0 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

Document Compression

Document response uses gzip; brotli would be ~20% smaller

REVIEW

Document response uses gzip; brotli would be ~20% smaller

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.

Page Weight Inventory

Action

40 resources · 1.6 MB · 0 KB savings available

REVIEW

40 resources · 1.6 MB · 0 KB savings available

Page weight 1.6 MB exceeds 1 MB target by 590 KB

Got: 1.6 MB Expected: ≤ 1 MB

40 resources · 1.6 MiB · 0 third-party 589.8 KiB over 1MB target

Image 96% · 1.5 MiB

Document 4% · 70.7 KiB

Other 0% · 1.4 KiB

CSS 0% · 175 B

JavaScript 0% · 0 B

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

40 resources			1.6 MiB

JavaScript Blocking

2 JS blocking issue(s) detected

REVIEW

2 JS blocking issue(s) detected

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.

Total JS execution time is 3.5 s -- over the 3.5s budget

Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Third-Party Impact

No third-party resources

PASS

No third-party resources

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

All text resources are properly compressed.

A+

Image Optimization

21 images, 0 KB saveable

PASS

21 images, 0 KB saveable

All images are well-optimized

21 images 1.5 MB

0 oversized -0 KB

0 legacy format

0 missing dimensions CLS risk

A+

Font Loading

No web fonts (system fonts)

PASS

No web fonts (system fonts)

No web fonts loaded — system fonts are fastest

No web fonts loaded — system fonts are optimal.

A+

JS Bundles

16 scripts, 0 KB unused

PASS

16 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Unused	Minified	Party
https://doonkoob.ir/_next/static/chunks/1ckhybdnqav1-.js	—	✓	1st
https://doonkoob.ir/_next/static/chunks/2xr9d8cyt7z75.js	—	✓	1st
https://doonkoob.ir/_next/static/chunks/2oizau18fdylu.js	—	✓	1st
https://doonkoob.ir/_next/static/chunks/2tkcdtqxhh81s.js	—	✓	1st
https://doonkoob.ir/_next/static/chunks/1_0v6exngdege.js	—	✓	1st
https://doonkoob.ir/_next/static/chunks/turbopack-12ad-59a5vzf4.js	—	✓	1st
https://doonkoob.ir/_next/static/chunks/399u762lm30nv.js	—	✓	1st
https://doonkoob.ir/_next/static/chunks/2oa3ndp6jugqr.js	—	✓	1st
https://doonkoob.ir/_next/static/chunks/3264y_0g3x9j5.js	—	✓	1st
https://doonkoob.ir/_next/static/chunks/14mrh2-p_w84d.js	—	✓	1st

A+

Resource Caching

All resources properly cached

PASS

All resources properly cached

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

3 hints, 0 missing preconnects

PASS

3 hints, 0 missing preconnects

Page uses 3 resource hint(s)

Current Resource Hints

preconnect

—

preload

dns-prefetch

—

prefetch

—

3 resource hints configured

A+

HTTP/3 (QUIC)

HTTP/3 advertised via Alt-Svc

PASS

HTTP/3 advertised via Alt-Svc

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

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

Got: private, no-cache, no-store, max-age=0, must-revalidate

A+

Server-Timing Observability

1 Server-Timing entries advertised

PASS

1 Server-Timing entries advertised

Server-Timing header advertises 1 timing entries

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`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).

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+

Render-Blocking Resources

No render-blocking resources detected

PASS

No render-blocking resources detected

No render-blocking resources detected in <head>

A+

Third-Party Resources

No third-party resources detected

PASS

No third-party resources detected

A+

CSS Performance Depth

No CSS performance depth issues detected

PASS

No CSS performance depth issues detected

Asset Compression

No text asset hosts to measure

INFO

No text asset hosts to measure

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

40 requests over 9648ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

15 images, 1617 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

1617 KB

14 missing dimensions

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.