https://masar.slidd.app
Performance
· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
92
GRADE
A
FIX
2
REVIEW
2
PASS
19
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
56
90
100
82
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
3.59 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
9.39 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
286 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.
6.22 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.
9.43 s
Page Load Progression
599 ms 1.2 s 1.8 s 2.4 s
3.0 s
3.6 s
4.2 s
4.8 sChecks
2519 PASS 2 REVIEW 2 FIX
FJS Execution CostAction3829ms total JS executionFIX
JS Execution Cost
Action3829ms total JS execution
3829ms total JS execution
Warning::
https://masar.slidd.app/assets/useScrollMotion-Cw_...: 2511ms CPU time
Warning::
https://masar.slidd.app/: 667ms CPU time
Warning::
https://masar.slidd.app/assets/index-DGdx5kQJ.js: 487ms CPU time
Info::
Unattributable: 163ms CPU time
Main Thread Breakdown
Other 36% Rendering 26% Style & Layout 20% Script Evaluation 16%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://masar.slidd.app/assets/useScrollMotion-Cw_qHNSZ.js | 2511ms | 341ms | 0ms | 1st |
| https://masar.slidd.app/ | 667ms | 6ms | 1ms | 1st |
| https://masar.slidd.app/assets/index-DGdx5kQJ.js | 487ms | 262ms | 1ms | 1st |
| Unattributable | 163ms | 8ms | 0ms | 1st |
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.
Info::
Last-Modified header present
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
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.
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.
APage Weight Budget1.0 MB transferred, 35 requestsPASS
Page Weight Budget
1.0 MB transferred, 35 requests
1.0 MB transferred, 35 requests
Info::
Page weighs 1.7 MB (1.0 MB transferred)
Info::
35 HTTP requests
Info::
Estimated 0.21 g CO2 per page load
1.0 MB transferred
35 requests
0.21 g CO2 per page load
Images 707.4 KiB 67%
JavaScript 181.5 KiB 17%
CSS 90.0 KiB 9%
Fonts 62.9 KiB 6%
Other 5.7 KiB 1%
HTML 953 B 0%
Other 919 B 0%
0 2.4 MB 4.9 MB
Under budget
A+Third-Party Impact7% third-party, 0 ms blockingPASS
Third-Party Impact
7% third-party, 0 ms blocking
7% third-party, 0 ms blocking
Info::
Third-party code accounts for 7% of page weight (70.0 KiB of 1.0 MiB)
Info::
Third-party blocking time is low (0 ms)
93%
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 Optimization2 images, 0 KB saveablePASS
Image Optimization
2 images, 0 KB saveable
2 images, 0 KB saveable
Info::
All images are well-optimized
2 images 707 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+Font Loading2 fonts (63 KB)PASS
Font Loading
2 fonts (63 KB)
2 fonts (63 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
2
63 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
SLXVc1nY6HkvangtZmpQdkh... woff2 swap
Size 30 KB
Load time 57 ms
Start 637 ms
Risk FOUT — text flashes from fallback to web font
SLXVc1nY6HkvangtZmpQdkh... woff2 swap
Size 33 KB
Load time 70 ms
Start 637 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+JS Bundles20 scripts, 33 KB unusedPASS
JS Bundles
20 scripts, 33 KB unused
20 scripts, 33 KB unused
Warning::
https://masar.slidd.app/assets/index-DGdx5kQJ.js: 33 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 33 KB
33 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://masar.slidd.app/assets/index-DGdx5kQJ.js | 93 KB | 33 KB (36%) | ✓ | 1st |
| https://masar.slidd.app/assets/LandingPage-CDof8pw9.js | 8 KB | — | ✓ | 1st |
| https://masar.slidd.app/assets/CountUp-Cw-7VQKM.js | 1 KB | — | ✓ | 1st |
| https://masar.slidd.app/assets/ucas-cover-Q0trv2yS.js | 1 KB | — | ✓ | 1st |
| https://masar.slidd.app/assets/log-in-CLHBWEOv.js | 1 KB | — | ✓ | 1st |
| https://masar.slidd.app/assets/chevron-right-BVbqcvPq.js | 1 KB | — | ✓ | 1st |
| https://masar.slidd.app/assets/useScrollMotion-Cw_qHNSZ.js | 52 KB | — | ✓ | 1st |
| https://masar.slidd.app/assets/user-check-0SwfTr2f.js | 1 KB | — | ✓ | 1st |
| https://masar.slidd.app/assets/file-text-3GXf9jaq.js | 1 KB | — | ✓ | 1st |
| https://masar.slidd.app/assets/archive-90JR4s8l.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
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 Hints2 hints, 0 missing preconnectsPASS
Resource Hints
2 hints, 0 missing preconnects
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)
Current Resource Hints
preconnect 2
preload—
dns-prefetch—
prefetch—
2 resource hints configured
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+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::
`Last-Modified` present -- timestamp-based conditional GET supported
Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.
A+Page Weight Inventory35 resources · 1.0 MB · 33 KB savings availablePASS
Page Weight Inventory
35 resources · 1.0 MB · 33 KB savings available
35 resources · 1.0 MB · 33 KB savings available
Warning::
Page weight 1.0 MB exceeds 1 MB target by 25 KB
Got: 1.0 MB Expected: ≤ 1 MB
Info::
9 third-party resources (7% of weight)
Info::
1 resources over 200KB
35 resources · 1.0 MiB · 9 third-party 25.3 KiB over 1MB target
Image 67% · 707.4 KiB
JavaScript 17% · 181.5 KiB
CSS 9% · 90.0 KiB
Font 6% · 62.9 KiB
Other 1% · 5.7 KiB
Document 0% · 1.8 KiB
~33.0 KiB of savings available
Remove unused JavaScript: 33.0 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 35 resources | 1.0 MiB | ||||||
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::
Total JS execution time is 3.8 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.
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
CSS Performance Depth
1 CSS depth issue(s) detected
1 CSS depth issue(s) detected
Warning::
4 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.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
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 Waterfall35 requests over 2527msINFO
Network Waterfall
35 requests over 2527ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.