https://91shex.com
Performance
· 28 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
85
GRADE
B
FIX
3
REVIEW
3
PASS
17
INFO
5
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
61
92
100
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
2.68 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.87 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.09 s
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.
3.38 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.
8.20 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
2817 PASS 3 REVIEW 3 FIX
FPage Weight BudgetAction12.3 MB transferred, 286 requestsFIX
Page Weight Budget
Action12.3 MB transferred, 286 requests
12.3 MB transferred, 286 requests
Critical::
Page weighs 16.3 MB (12.3 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
Warning::
286 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 2.6 g CO2 per page load
12.3 MB transferred
286 requests
2.6 g CO2 per page load
Other 10.2 MiB 83%
Images 1.5 MiB 12%
JavaScript 366.3 KiB 3%
Other 115.8 KiB 1%
HTML 48.9 KiB 0%
CSS 43.2 KiB 0%
Other 434 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget
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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Why this matters
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
FJS Execution CostAction8693ms total JS executionFIX
JS Execution Cost
Action8693ms total JS execution
8693ms total JS execution
Warning::
https://91shex.com/: 3276ms CPU time
Warning::
https://91shex.com/static/web/js/plugins/encrypted...: 1708ms CPU time
Warning::
Unattributable: 1636ms CPU time
Warning::
https://91shex.com/static/web/js/lib/web-sdk-v1.1....: 976ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-884P...: 525ms CPU time
Info::
Third-party scripts: 525ms (6% of total)
Main Thread Breakdown
Script Evaluation 38% Style & Layout 30% Other 23%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://91shex.com/ | 3276ms | 36ms | 9ms | 1st |
| https://91shex.com/static/web/js/plugins/encrypted-image-loader.js?v=20260930006 | 1708ms | 1542ms | 4ms | 1st |
| Unattributable | 1636ms | 46ms | 0ms | 1st |
| https://91shex.com/static/web/js/lib/web-sdk-v1.1.8.js?v=20260930006 | 976ms | 773ms | 21ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-884PWMH6CY | 525ms | 388ms | 91ms | 3rd |
| https://91shex.com/static/web91/js/lib/require.js | 336ms | 319ms | 4ms | 1st |
| https://91shex.com/static/web/js/web_tracker_v18.js?v=20260930006 | 169ms | 129ms | 11ms | 1st |
| https://91shex.com/static/web91/js/lib/jquery.js?v=20260930006 | 67ms | 48ms | 16ms | 1st |
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-store
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
private, no-store
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| no-store | — | Never cache this response |
BImage Optimization129 images, 0 KB saveableREVIEW
Image Optimization
129 images, 0 KB saveable
129 images, 0 KB saveable
Info::
All images are well-optimized
129 images 1.5 MB
0 oversized -0 KB
7 legacy format
0 missing dimensions CLS risk
BJS Bundles20 scripts, 100 KB unusedREVIEW
JS Bundles
20 scripts, 100 KB unused
20 scripts, 100 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-884P...: 74 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://91shex.com/static/web91/js/common.js?v=202...: 26 KB unused (87%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://91shex.com/static/web91/js/common.js?v=202...: unminified — 8 KB could be saved
Info::
Total unused JavaScript: 100 KB
100 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-884PWMH6CY | 177 KB | 74 KB (42%) | ✓ | 3rd |
| https://91shex.com/static/web91/js/common.js?v=20260930006 | 32 KB | 26 KB (87%) | ✗ | 1st |
| https://91shex.com/static/web91/js/http.js?v=20260930006 | 2 KB | — | ✓ | 1st |
| https://91shex.com/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js | 1 KB | — | ✓ | 1st |
| https://91shex.com/static/web91/js/utils.js?v=20260930006 | 3 KB | — | ✓ | 1st |
| https://91shex.com/static/web91/js/main.js | 1 KB | — | ✓ | 1st |
| https://91shex.com/static/web91/js/lib/zui.js?v=20260930006 | 11 KB | — | ✗ | 1st |
| https://91shex.com/static/web/js/plugins/cdn-header.js?v=20260930006 | 1 KB | — | ✓ | 1st |
| https://91shex.com/static/web/js/plugins/cdn-header-core.js?v=20260930006 | 1 KB | — | ✓ | 1st |
| https://91shex.com/cdn-config.js?v=20260930006 | 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
CPage Weight InventoryAction286 resources · 12.3 MB · 100 KB savings availableREVIEW
Page Weight Inventory
Action286 resources · 12.3 MB · 100 KB savings available
286 resources · 12.3 MB · 100 KB savings available
Warning::
Page weight 12.3 MB exceeds 1 MB target by 11.3 MB
Got: 12.3 MB Expected: ≤ 1 MB
Info::
~100 KB of savings available
Info::
139 third-party resources (1% of weight)
Info::
7 resources over 200KB
286 resources · 12.3 MiB · 139 third-party 11.3 MiB over 1MB target
Other 83% · 10.2 MiB
Image 13% · 1.6 MiB
JavaScript 3% · 366.3 KiB
Document 0% · 48.9 KiB
CSS 0% · 43.2 KiB
~99.7 KiB of savings available
Remove unused JavaScript: 99.7 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 286 resources | 12.3 MiB | ||||||
A+Third-Party Impact1% third-party, 0 ms blockingPASS
Third-Party Impact
1% third-party, 0 ms blocking
1% third-party, 0 ms blocking
Info::
Third-party code accounts for 1% of page weight (188.3 KiB of 12.3 MiB)
Info::
Third-party blocking time is low (0 ms)
99%
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+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 Hints12 hints, 0 missing preconnectsPASS
Resource Hints
12 hints, 0 missing preconnects
12 hints, 0 missing preconnects
Info::
Page uses 12 resource hint(s)
Current Resource Hints
preconnect—
preload
+2
12dns-prefetch—
prefetch—
12 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+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-store
A+Server-Timing Observability3 Server-Timing entries advertisedPASS
Server-Timing Observability
3 Server-Timing entries advertised
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
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: Host
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+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 8.7 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::
9 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 Waterfall286 requests over 26083msINFO
Network Waterfall
286 requests over 26083ms
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
6% of JavaScript execution is third-party
First-party Third-party 525ms · 177KB · ¥26/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 525ms | 177 KB | 42% | ¥26/mo | Costly |
Google Tag Manager
Tag Manager
Execution 525ms
Transfer 177 KB
Unused 42%
Monthly Cost ¥26/mo
These scripts may cost more than they're worth
- Google Tag Manager adds 525ms and costs ~¥26/month
Google Tag Manager takes 525ms 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
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)
1767 ms
86% good
INP (p75)
145 ms
86% good
CLS (p75)
0.000
98% good
FCP (p75)
1267 ms
TTFB (p75)
770 ms
This origin passes Core Web Vitals assessment
Image Optimization199 images, 9436 KB total, 2009 KB wastedINFO
Image Optimization
199 images, 9436 KB total, 2009 KB wasted
Image Optimization Audit
Total Images
199
Total Size
9436 KB
Oversized
1
Wasted
2009 KB
193 missing dimensions 192 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.