https://immocastlepromotion.dz
Performance
· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
89
GRADE
B
FIX
2
REVIEW
5
PASS
12
INFO
4
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
89
95
100
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
992 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.65 s
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.
1.99 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.
1.65 s
Page Load Progression
1.3 s
2.7 s
4.0 s 5.3 s
6.7 s
8.0 s
9.3 s
10.7 sChecks
2312 PASS 5 REVIEW 2 FIX
DPage Weight BudgetAction2.2 MB transferred, 49 requestsFIX
Page Weight Budget
Action2.2 MB transferred, 49 requests
2.2 MB transferred, 49 requests
Info::
Page weighs 3.9 MB (2.2 MB transferred)
Warning::
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
Info::
Fonts are 226 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 226 KB
Info::
49 HTTP requests
Info::
Estimated 0.46 g CO2 per page load
2.2 MB transferred
49 requests
0.46 g CO2 per page load
Images 1.5 MiB 66%
JavaScript 320.5 KiB 14%
Fonts 225.7 KiB 10%
CSS 159.8 KiB 7%
Other 43.7 KiB 2%
HTML 9.8 KiB 0%
Other 1.6 KiB 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
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
DHTTP CachingActionno-store (uncacheable)FIX
HTTP Caching
Actionno-store (uncacheable)
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, no-cache, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
no-store, no-cache, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| no-store | — | Never cache this response |
| no-cache | — | Cache but always revalidate first |
| must-revalidate | — | Must recheck with server after expiry |
BJS Execution Cost762ms total JS executionREVIEW
JS Execution Cost
762ms total JS execution
762ms total JS execution
Warning::
https://immocastlepromotion.dz/: 493ms CPU time
Info::
Unattributable: 190ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-LT6M...: 78ms CPU time
Info::
Third-party scripts: 78ms (10% of total)
Main Thread Breakdown
Other 45% Style & Layout 25% Script Evaluation 16% Rendering 6% Parse HTML & CSS 3%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://immocastlepromotion.dz/ | 493ms | 1ms | 0ms | 1st |
| Unattributable | 190ms | 1ms | 0ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-LT6M5ZW4Q2 | 78ms | 63ms | 12ms | 3rd |
BJS Bundles18 scripts, 73 KB unusedREVIEW
JS Bundles
18 scripts, 73 KB unused
18 scripts, 73 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-LT6M...: 73 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 73 KB
73 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-LT6M5ZW4Q2 | 173 KB | 73 KB (42%) | ✓ | 3rd |
| https://immocastlepromotion.dz/vendor/Splitting/dist/Splitting.min.js | 2 KB | — | ✓ | 1st |
| https://immocastlepromotion.dz/vendor/counter/counterup.min.js | 1 KB | — | ✓ | 1st |
| https://immocastlepromotion.dz/vendor/bootstrap/js/bootstrap.bundle.min.js | 22 KB | — | ✓ | 1st |
| https://immocastlepromotion.dz/vendor/bootstrap-select/js/bootstrap-select.min.js | 17 KB | — | ✓ | 1st |
| https://immocastlepromotion.dz/vendor/rangeslider/rangeslider.js | 12 KB | — | ✗ | 1st |
| https://immocastlepromotion.dz/vendor/magnific-popup/magnific-popup.js | 7 KB | — | ✓ | 1st |
| https://immocastlepromotion.dz/vendor/lightgallery/js/lightgallery-all.min.js | 11 KB | — | ✓ | 1st |
| https://immocastlepromotion.dz/js/theme-init.js | 0 KB | — | ✓ | 1st |
| https://immocastlepromotion.dz/js/main/jquery.min.js | 29 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
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
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.
CPage Weight InventoryAction49 resources · 2.2 MB · 73 KB savings availableREVIEW
Page Weight Inventory
Action49 resources · 2.2 MB · 73 KB savings available
49 resources · 2.2 MB · 73 KB savings available
Warning::
Page weight 2.2 MB exceeds 1 MB target by 1.2 MB
Got: 2.2 MB Expected: ≤ 1 MB
Info::
~73 KB of savings available
Info::
7 third-party resources (11% of weight)
Info::
4 resources over 200KB
49 resources · 2.2 MiB · 7 third-party 1.2 MiB over 1MB target
Image 68% · 1.5 MiB
JavaScript 14% · 320.5 KiB
Font 10% · 225.7 KiB
CSS 7% · 159.8 KiB
Document 0% · 9.8 KiB
Other 0% · 1.6 KiB
~73.0 KiB of savings available
Remove unused JavaScript: 73.0 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 49 resources | 2.2 MiB | ||||||
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
A+Third-Party Impact11% third-party, 0 ms blockingPASS
Third-Party Impact
11% third-party, 0 ms blocking
11% third-party, 0 ms blocking
Info::
Third-party code accounts for 11% of page weight (250.8 KiB of 2.2 MiB)
Info::
Third-party blocking time is low (0 ms)
89%
First-party Third-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.
AImage Optimization7 images, 0 KB saveablePASS
Image Optimization
7 images, 0 KB saveable
7 images, 0 KB saveable
Warning::
https://immocastlepromotion.dz/cdn/gallery/d191f8b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://immocastlepromotion.dz/assets/images/logo%... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
7 images 1.5 MB
0 oversized -0 KB
0 legacy format
2 missing dimensions CLS risk
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
A+Font Loading6 fonts (226 KB)PASS
Font Loading
6 fonts (226 KB)
6 fonts (226 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
6
226 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
font-woff;charset=utf-8... woff swap
Size 2 KB
Load time 36 ms
Start 495 ms
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
JTUSjIg1_i6t8kCHKm459Wl... woff2 swap
Size 35 KB
Load time 45 ms
Start 529 ms
Risk FOUT — text flashes from fallback to web font
fa-solid-900.woff2 woff2 swap
Size 79 KB
Load time 83 ms
Start 529 ms
Risk FOUT — text flashes from fallback to web font
fa-regular-400.woff2 woff2 swap
Size 13 KB
Load time 82 ms
Start 529 ms
Risk FOUT — text flashes from fallback to web font
TK3IWkUHHAIjg75cFRf3bXL... woff2 swap
Size 21 KB
Load time 33 ms
Start 530 ms
Risk FOUT — text flashes from fallback to web font
fa-brands-400.woff2 woff2 swap
Size 77 KB
Load time 68 ms
Start 576 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 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 HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
HTTP/3 advertised via Alt-Svc
Info::
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+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+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-store, no-cache, must-revalidate
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,User-Agent
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.
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 Waterfall49 requests over 2349msINFO
Network Waterfall
49 requests over 2349ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
10% of JavaScript execution is third-party
First-party Third-party 78ms · 173KB · د.ج141/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 78ms | 173 KB | 42% | د.ج141/mo | Costly |
Google Tag Manager
Tag Manager
Execution 78ms
Transfer 173 KB
Unused 42%
Monthly Cost د.ج141/mo
These scripts may cost more than they're worth
- Google Tag Manager adds 78ms and costs ~د.ج141/month
Google Tag Manager takes 78ms 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
Image Optimization19 images, 3844 KB total, 1000 KB wastedINFO
Image Optimization
19 images, 3844 KB total, 1000 KB wasted
Image Optimization Audit
Total Images
19
Total Size
3844 KB
Oversized
5
Wasted
1000 KB
12 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.