https://fzcars.ir
Performance
· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
93
GRADE
A
FIX
1
REVIEW
5
PASS
17
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
99
100
100
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.46 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.98 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
23 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.002
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.31 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.
1.98 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 sChecks
2617 PASS 5 REVIEW 1 FIX
FHTTP CachingActionNo cache headersFIX
HTTP Caching
ActionNo cache headers
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.
BImage Optimization50 images, 0 KB saveableREVIEW
Image Optimization
50 images, 0 KB saveable
50 images, 0 KB saveable
Info::
All images are well-optimized
50 images 343 KB
0 oversized -0 KB
17 legacy format
0 missing dimensions CLS risk
CJS Execution CostAction1383ms total JS executionREVIEW
JS Execution Cost
Action1383ms total JS execution
1383ms total JS execution
Warning::
https://fzcars.ir/: 891ms CPU time
Warning::
Unattributable: 492ms CPU time
Main Thread Breakdown
Other 44% Style & Layout 39% Rendering 9% Script Evaluation 4%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://fzcars.ir/ | 891ms | 22ms | 2ms | 1st |
| Unattributable | 492ms | 9ms | 0ms | 1st |
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
HTTP/3 (QUIC)
HTTP/3 not advertised
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.
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
Main HTML Cache-Control
No Cache-Control header on main HTML response
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.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
APage Weight Budget813 KB transferred, 83 requestsPASS
Page Weight Budget
813 KB transferred, 83 requests
813 KB transferred, 83 requests
Info::
Page weighs 994 KB (813 KB transferred)
Info::
Fonts are 352 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 352 KB
Info::
83 HTTP requests
Info::
Estimated 0.17 g CO2 per page load
813 KB transferred
83 requests
0.17 g CO2 per page load
Fonts 352.2 KiB 43%
Images 342.6 KiB 42%
JavaScript 36.0 KiB 4%
CSS 32.3 KiB 4%
HTML 29.4 KiB 4%
Other 19.1 KiB 2%
Other 1.3 KiB 0%
0 2.4 MB 4.9 MB
Under budget
Subset fonts to include only used characters, or switch to system font stacks.
Why this matters
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
A+Third-Party ImpactNo third-party resourcesPASS
Third-Party Impact
No third-party resources
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+Font Loading6 fonts (352 KB)PASS
Font Loading
6 fonts (352 KB)
6 fonts (352 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
6
352 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
PeydaFaNumWeb-Regular.woff woff swap
Size 59 KB
Load time 520 ms
Start 519 ms
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
PeydaFaNumWeb-Medium.woff woff swap
Size 59 KB
Load time 556 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
PeydaFaNumWeb-Light.woff woff swap
Size 58 KB
Load time 552 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
PeydaFaNumWeb-Bold.woff woff swap
Size 59 KB
Load time 530 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
PeydaFaNumWeb-SemiBold.... woff swap
Size 59 KB
Load time 566 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
PeydaFaNumWeb-ExtraBold... woff swap
Size 59 KB
Load time 858 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
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)
Fixing the unchecked items could save ~106 KB and ~212 ms
A+JS Bundles15 scripts, 0 KB unusedPASS
JS Bundles
15 scripts, 0 KB unused
15 scripts, 0 KB unused
0 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://fzcars.ir/js/defer-css.js?v=1 | 1 KB | — | ✓ | 1st |
| https://fzcars.ir/js/numeric-input.js?v=2 | 2 KB | — | ✓ | 1st |
| https://fzcars.ir/js/safe-path.js | 1 KB | — | ✓ | 1st |
| https://fzcars.ir/js/toast.js?v=1 | 2 KB | — | ✓ | 1st |
| https://fzcars.ir/js/auth-pending.js?v=16 | 3 KB | — | ✓ | 1st |
| https://fzcars.ir/js/terms-accept.js?v=1 | 2 KB | — | ✓ | 1st |
| https://fzcars.ir/js/chat-login-modal.js?v=13 | 5 KB | — | ✓ | 1st |
| https://fzcars.ir/js/identity-verify.js?v=2 | 2 KB | — | ✓ | 1st |
| https://fzcars.ir/js/service-requests.js?v=6 | 4 KB | — | ✓ | 1st |
| https://fzcars.ir/js/favorites.js?v=2 | 2 KB | — | ✓ | 1st |
A+Resource CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource Hints1 hints, 0 missing preconnectsPASS
Resource Hints
1 hints, 0 missing preconnects
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)
Current Resource Hints
preconnect—
preload 1
dns-prefetch—
prefetch—
1 resource hints configured
A+Document CompressionDocument response uses brotliPASS
Document Compression
Document response uses brotli
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 PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Server-Timing Observability1 Server-Timing entries advertisedPASS
Server-Timing Observability
1 Server-Timing entries advertised
1 Server-Timing entries advertised
Info::
Server-Timing header advertises 1 timing entries
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
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 Inventory83 resources · 813 KB · 0 KB savings availablePASS
Page Weight Inventory
83 resources · 813 KB · 0 KB savings available
83 resources · 813 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 813 KB
83 resources · 812.9 KiB · 0 third-party Within 1MB page-weight target
Image 45% · 361.8 KiB
Font 43% · 352.2 KiB
JavaScript 4% · 36.0 KiB
CSS 4% · 32.3 KiB
Document 4% · 29.4 KiB
Other 0% · 1.3 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 83 resources | 812.9 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
Render-Blocking Resources
No render-blocking resources detected
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+Third-Party ResourcesNo third-party resources detectedPASS
Third-Party Resources
No third-party resources detected
No third-party resources detected
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
JavaScript Blocking
1 JS blocking issue(s) detected
1 JS blocking issue(s) detected
Warning::
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.
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
CSS Performance Depth
1 CSS depth issue(s) detected
1 CSS depth issue(s) detected
Warning::
8 render-blocking stylesheet(s) -- recommended: <=3
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
Asset CompressionNo text asset hosts to measureINFO
Asset Compression
No text asset hosts to measure
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 Waterfall83 requests over 4627msINFO
Network Waterfall
83 requests over 4627ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization107 images, 226 KB total, 5 KB wastedINFO
Image Optimization
107 images, 226 KB total, 5 KB wasted
Image Optimization Audit
Total Images
107
Total Size
226 KB
Oversized
1
Wasted
5 KB
41 missing dimensions 27 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.