https://burj-almubdia.com
Performance
· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
92
GRADE
A
FIX
1
REVIEW
5
PASS
13
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
98
90
92
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
561 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.08 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.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
911 ms
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
1.08 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
2113 PASS 5 REVIEW 1 FIX
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: private, no-cache, no-store, max-age=0, must-revalidate
Info::
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 |
CJS BundlesAction15 scripts, 159 KB unusedREVIEW
JS Bundles
Action15 scripts, 159 KB unused
15 scripts, 159 KB unused
Warning::
https://burj-almubdia.com/_next/static/chunks/01ia...: 60 KB unused (86%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://burj-almubdia.com/_next/static/chunks/0vok...: 38 KB unused (100%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://burj-almubdia.com/_next/static/chunks/11be...: 35 KB unused (100%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://burj-almubdia.com/_next/static/chunks/08c7...: 27 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 159 KB
159 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://burj-almubdia.com/_next/static/chunks/01iahevbqhpzt.js | 69 KB | 60 KB (86%) | ✓ | 1st |
| https://burj-almubdia.com/_next/static/chunks/0vokiadnpqopv.js | 38 KB | 38 KB (100%) | ✓ | 1st |
| https://burj-almubdia.com/_next/static/chunks/11be7t2ypx4a8.js | 35 KB | 35 KB (100%) | ✓ | 1st |
| https://burj-almubdia.com/_next/static/chunks/08c7277ny3zun.js | 37 KB | 27 KB (73%) | ✓ | 1st |
| https://burj-almubdia.com/_next/static/chunks/07f6v-a0-9bws.js | 6 KB | — | ✓ | 1st |
| https://burj-almubdia.com/_next/static/chunks/turbopack-24iogg8nbo0i9.js | 4 KB | — | ✓ | 1st |
| https://burj-almubdia.com/_next/static/chunks/2zjueh7t2vecu.js | 2 KB | — | ✓ | 1st |
| https://burj-almubdia.com/_next/static/chunks/14mrh2-p_w84d.js | 13 KB | — | ✓ | 1st |
| https://burj-almubdia.com/_next/static/chunks/2p7z3hxv4n75_.js | 9 KB | — | ✓ | 1st |
| https://burj-almubdia.com/_next/static/chunks/3g5z1j2x5t36y.js | 1 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
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
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.
BCompression AlgorithmMain response uses gzip; brotli would be ~20% smallerREVIEW
Compression Algorithm
Main response uses gzip; brotli would be ~20% smaller
Main response uses gzip; brotli would be ~20% smaller
Info::
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.
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.
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+Page Weight Budget583 KB transferred, 42 requestsPASS
Page Weight Budget
583 KB transferred, 42 requests
583 KB transferred, 42 requests
Info::
Page weighs 1.4 MB (583 KB transferred)
Info::
42 HTTP requests
Info::
Estimated 0.12 g CO2 per page load
583 KB transferred
42 requests
0.12 g CO2 per page load
JavaScript 246.2 KiB 42%
Images 188.8 KiB 32%
Fonts 101.7 KiB 17%
CSS 24.8 KiB 4%
HTML 17.0 KiB 3%
Other 3.5 KiB 1%
Other 945 B 0%
0 2.4 MB 4.9 MB
Under budget
AThird-Party Impact32% third-party, 0 ms blockingPASS
Third-Party Impact
32% third-party, 0 ms blocking
32% third-party, 0 ms blocking
Info::
Third-party code accounts for 32% of page weight (188.8 KiB of 583.0 KiB)
Info::
Third-party blocking time is low (0 ms)
68%
32%
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.
A+Image Optimization10 images, 0 KB saveablePASS
Image Optimization
10 images, 0 KB saveable
10 images, 0 KB saveable
Info::
All images are well-optimized
10 images 189 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+JS Execution Cost262ms total JS executionPASS
JS Execution Cost
262ms total JS execution
262ms total JS execution
Info::
https://burj-almubdia.com/: 202ms CPU time
Info::
Unattributable: 60ms CPU time
Main Thread Breakdown
Style & Layout 44% Other 27% Script Evaluation 15% Script Parsing & Compilation 7% Rendering 4%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://burj-almubdia.com/ | 202ms | 8ms | 0ms | 1st |
| Unattributable | 60ms | 1ms | 0ms | 1st |
A+Font Loading11 fonts (102 KB)PASS
Font Loading
11 fonts (102 KB)
11 fonts (102 KB)
Info::
11 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
11
102 KB total
Render-blocking
0
of 11
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
48e6fa8a5baca31f-s.p.14... woff2 swap
Size 9 KB
Load time 127 ms
Start 761 ms
Risk FOUT — text flashes from fallback to web font
4b676bcffc00356a-s.p.24... woff2 swap
Size 9 KB
Load time 165 ms
Start 762 ms
Risk FOUT — text flashes from fallback to web font
7ca057cce9853046-s.p.0i... woff2 swap
Size 8 KB
Load time 133 ms
Start 762 ms
Risk FOUT — text flashes from fallback to web font
80c3108817f102b0-s.p.2s... woff2 swap
Size 9 KB
Load time 173 ms
Start 763 ms
Risk FOUT — text flashes from fallback to web font
d078e09ad8bf17e2-s.p.2k... woff2 swap
Size 9 KB
Load time 179 ms
Start 763 ms
Risk FOUT — text flashes from fallback to web font
d54db18e8cd5f74f-s.p.0j... woff2 swap
Size 9 KB
Load time 140 ms
Start 763 ms
Risk FOUT — text flashes from fallback to web font
e9f32d51db34fd0c-s.p.3d... woff2 swap
Size 9 KB
Load time 148 ms
Start 764 ms
Risk FOUT — text flashes from fallback to web font
1d2cc0c079997359-s.44lk... woff2 swap
Size 10 KB
Load time 137 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
e7b64a7fde1a3d32-s.2g2p... woff2 swap
Size 10 KB
Load time 129 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
f0e0669539caf32a-s.2csl... woff2 swap
Size 10 KB
Load time 128 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
3a179c97f46f8d27-s.43x0... woff2 swap
Size 10 KB
Load time 125 ms
Start 1.0 s
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+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: private, no-cache, no-store, max-age=0, 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: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch,...
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 Inventory42 resources · 583 KB · 159 KB savings availablePASS
Page Weight Inventory
42 resources · 583 KB · 159 KB savings available
42 resources · 583 KB · 159 KB savings available
Info::
Within 1MB page-weight target
Got: 583 KB
Info::
~159 KB of savings available
Info::
10 third-party resources (32% of weight)
42 resources · 583.0 KiB · 10 third-party Within 1MB page-weight target
JavaScript 42% · 246.2 KiB
Image 33% · 192.3 KiB
Font 17% · 101.7 KiB
CSS 4% · 24.8 KiB
Document 3% · 17.0 KiB
Other 0% · 945 B
~159.4 KiB of savings available
Remove unused JavaScript: 159.4 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 42 resources | 583.0 KiB | ||||||
Network Waterfall42 requests over 1295msINFO
Network Waterfall
42 requests over 1295ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization84 images, 260 KB total, 124 KB wastedINFO
Image Optimization
84 images, 260 KB total, 124 KB wasted
Image Optimization Audit
Total Images
84
Total Size
260 KB
Oversized
6
Wasted
124 KB
79 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.