https://91sanji.com
Performance
· 24 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
80
GRADE
B
FIX
4
REVIEW
5
PASS
10
INFO
5
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
90
93
96
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
439 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.76 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
14 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.
1.79 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.
2.51 s
Page Load Progression
860 ms
1.7 s
2.6 s
3.4 s
4.3 s
5.2 s
6.0 s
6.9 sChecks
2410 PASS 5 REVIEW 4 FIX
FPage Weight BudgetAction7.5 MB transferred, 63 requestsFIX
Page Weight Budget
Action7.5 MB transferred, 63 requests
7.5 MB transferred, 63 requests
Critical::
Page weighs 15.3 MB (7.5 MB transferred)
Info::
63 HTTP requests
Info::
Estimated 1.6 g CO2 per page load
7.5 MB transferred
63 requests
1.6 g CO2 per page load
Other 7.1 MiB 95%
JavaScript 272.9 KiB 4%
Images 70.9 KiB 1%
CSS 31.9 KiB 0%
HTML 22.1 KiB 0%
Other 7.9 KiB 0%
0 2.4 MB 4.9 MB
Over budget
DThird-Party ImpactAction97% third-party, 0 ms blockingFIX
Third-Party Impact
Action97% third-party, 0 ms blocking
97% third-party, 0 ms blocking
Warning::
Third-party code accounts for 97% of page weight (7.2 MiB of 7.5 MiB)
Info::
Third-party blocking time is low (0 ms)
97%
First-party Third-party
DPage Weight InventoryAction63 resources · 7.5 MB · 103 KB savings availableFIX
Page Weight Inventory
Action63 resources · 7.5 MB · 103 KB savings available
63 resources · 7.5 MB · 103 KB savings available
Warning::
Page weight 7.5 MB exceeds 1 MB target by 6.5 MB
Got: 7.5 MB Expected: ≤ 1 MB
Info::
~103 KB of savings available
Warning::
22 third-party resources (97% of weight)
Info::
5 resources over 200KB
63 resources · 7.5 MiB · 22 third-party 6.5 MiB over 1MB target
Other 95% · 7.1 MiB
JavaScript 4% · 273.5 KiB
Image 1% · 78.8 KiB
CSS 0% · 31.9 KiB
Document 0% · 22.1 KiB
~102.8 KiB of savings available
Remove unused JavaScript: 102.8 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 63 resources | 7.5 MiB | ||||||
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 Optimization31 images, 0 KB saveableREVIEW
Image Optimization
31 images, 0 KB saveable
31 images, 0 KB saveable
Warning::
https://91sanji.com/static/sjp-v2/images/design/ho... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
31 images 71 KB
0 oversized -0 KB
21 legacy format
1 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
CJS Execution CostAction1540ms total JS executionREVIEW
JS Execution Cost
Action1540ms total JS execution
1540ms total JS execution
Warning::
https://91sanji.com/: 954ms CPU time
Warning::
Unattributable: 468ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-N2MX...: 118ms CPU time
Info::
Third-party scripts: 118ms (8% of total)
Main Thread Breakdown
Other 39% Style & Layout 24% Script Evaluation 17% Rendering 16%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://91sanji.com/ | 954ms | 23ms | 2ms | 1st |
| Unattributable | 468ms | 115ms | 0ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-N2MXKB6JRG | 118ms | 94ms | 22ms | 3rd |
BJS Bundles12 scripts, 103 KB unusedREVIEW
JS Bundles
12 scripts, 103 KB unused
12 scripts, 103 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-N2MX...: 73 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://91sanji.com/static/web/js/lib/web-sdk-v1.1...: 29 KB unused (88%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 103 KB
103 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-N2MXKB6JRG | 177 KB | 73 KB (42%) | ✓ | 3rd |
| https://91sanji.com/static/web/js/lib/web-sdk-v1.1.8.js?v=202610161181355418 | 34 KB | 29 KB (88%) | ✓ | 1st |
| https://91sanji.com/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js | 1 KB | — | ✓ | 1st |
| https://91sanji.com/static/sjp-v2/js/watch-history.js?v=202610161181355418 | 1 KB | — | ✓ | 1st |
| https://91sanji.com/static/sjp-v2/js/search-history.js?v=202610161181355418 | 2 KB | — | ✓ | 1st |
| https://91sanji.com/static/web/js/search-path.js?v=202610161181355418 | 1 KB | — | ✓ | 1st |
| https://91sanji.com/static/web/js/lib/crypto-js.min.js?v=202610161181355418 | 17 KB | — | ✓ | 1st |
| https://91sanji.com/static/web/js/web_tracker_v18.js?v=202610161181355418 | 27 KB | — | ✓ | 1st |
| https://91sanji.com/static/web/js/tracking-extras.js?v=202610161181355418 | 3 KB | — | ✓ | 1st |
| https://91sanji.com/static/sjp-v2/js/site.js?v=202610161181355418 | 8 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
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.
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 LoadingNo web fonts (system fonts)PASS
Font Loading
No web fonts (system fonts)
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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+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+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 Waterfall63 requests over 6590msINFO
Network Waterfall
63 requests over 6590ms
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
8% of JavaScript execution is third-party
First-party Third-party 118ms · 177KB · ¥6/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 118ms | 177 KB | 42% | ¥6/mo | Optional |
Google Tag Manager
Tag Manager
Execution 118ms
Transfer 177 KB
Unused 42%
Monthly Cost ¥6/mo
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-09-23 — 2026-10-20)
LCP (p75)
2030 ms
82% good
INP (p75)
104 ms
95% good
CLS (p75)
0.000
99% good
FCP (p75)
1130 ms
TTFB (p75)
878 ms
This origin passes Core Web Vitals assessment
Image Optimization170 images, 184 KB total, 0 KB wastedINFO
Image Optimization
170 images, 184 KB total, 0 KB wasted
Image Optimization Audit
Total Images
170
Total Size
184 KB
55 missing dimensions 40 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.