Performance
· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
5.52 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
13.16 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
57 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.
17.01 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.
13.19 s
Page Load Progression
DPage Weight BudgetAction2.5 MB transferred, 49 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
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.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
DJS Execution CostAction2416ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://immocastlepromotion.dz/ | 1040ms | 26ms | 4ms | 1st |
| Unattributable | 782ms | 9ms | 0ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-LT6M5ZW4Q2 | 231ms | 181ms | 42ms | 3rd |
| https://immocastlepromotion.dz/vendor/swiper/swiper-bundle.min.js | 162ms | 54ms | 10ms | 1st |
| https://immocastlepromotion.dz/js/index.js?v=1787730910 | 129ms | 96ms | 1ms | 1st |
| https://immocastlepromotion.dz/js/main/jquery.min.js | 72ms | 51ms | 18ms | 1st |
DHTTP CachingActionno-store (uncacheable)FIX
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 Bundles15 scripts, 73 KB unusedREVIEW
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/js/main/jquery.min.js | 29 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/vendor/Splitting/dist/Splitting.min.js | 2 KB | — | ✓ | 1st |
| https://immocastlepromotion.dz/vendor/counter/waypoints-min.js | 2 KB | — | ✓ | 1st |
| https://immocastlepromotion.dz/vendor/counter/counterup.min.js | 1 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
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
CPage Weight InventoryAction49 resources · 2.5 MB · 73 KB savings availableREVIEW
~73.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 49 resources | 2.5 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
AThird-Party Impact21% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
AImage Optimization7 images, 0 KB saveablePASS
Set explicit width and height to prevent CLS.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
A+Font Loading9 fonts (520 KB)PASS
Web fonts
9
520 KB total
Render-blocking
0
of 9
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~135 KB and ~270 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints10 hints, 0 missing preconnectsPASS
Current Resource Hints
10 resource hints configured
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: https://fonts.googleapis.com (preconnect+preconnect), https://fonts.gstatic.com (preconnect+preconnect).
Performance issues directly impact user engagement and conversion rates.
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+Document CompressionDocument response uses brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+JavaScript BlockingNo render-blocking JS or document.write usage detectedPASS
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall49 requests over 1900msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 231ms | 173 KB | 42% | د.ج414/mo | Costly |
These scripts may cost more than they're worth
- Google Tag Manager adds 231ms and costs ~د.ج414/month
Google Tag Manager takes 231ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
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 Audit
Total Images
19
Total Size
3844 KB
Oversized
5
Wasted
1000 KB