https://91spx.com
Performance
· 28 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
81
GRADE
B
FIX
4
REVIEW
4
PASS
15
INFO
5
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
36
79
92
92
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
2.58 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
11.17 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
3.64 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.029
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.39 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.
12.37 s
Page Load Progression
797 ms 1.6 s
2.4 s
3.2 s
4.0 s
4.8 s
5.6 s
6.4 sChecks
2815 PASS 4 REVIEW 4 FIX
FPage Weight BudgetAction4.3 MB transferred, 107 requestsFIX
Page Weight Budget
Action4.3 MB transferred, 107 requests
4.3 MB transferred, 107 requests
Critical::
Page weighs 5.3 MB (4.3 MB transferred)
Warning::
107 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.90 g CO2 per page load
4.3 MB transferred
107 requests
0.90 g CO2 per page load
Other 3.2 MiB 76%
JavaScript 463.6 KiB 11%
Other 456.7 KiB 10%
Images 75.6 KiB 2%
HTML 34.0 KiB 1%
CSS 19.6 KiB 0%
Other 916 B 0%
Other 746 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget
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
DThird-Party ImpactAction82% third-party, 0 ms blockingFIX
Third-Party Impact
Action82% third-party, 0 ms blocking
82% third-party, 0 ms blocking
Warning::
Third-party code accounts for 82% of page weight (3.5 MiB of 4.3 MiB)
Info::
Third-party blocking time is low (0 ms)
18%
82%
First-party Third-party
FJS Execution CostAction9838ms total JS executionFIX
JS Execution Cost
Action9838ms total JS execution
9838ms total JS execution
Warning::
https://91spx.com/static/web/js/plugins/lazyload.j...: 3271ms CPU time
Warning::
https://91spx.com/static/web/js/web-sdk-v1.1.8.js?...: 2494ms CPU time
Warning::
Unattributable: 1424ms CPU time
Warning::
https://91spx.com/: 858ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-74HK...: 516ms CPU time
Info::
Third-party scripts: 1077ms (11% of total)
Main Thread Breakdown
Script Evaluation 59% Other 17% Style & Layout 15% Rendering 4%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://91spx.com/static/web/js/plugins/lazyload.js?v=1.7.16 | 3271ms | 3025ms | 3ms | 1st |
| https://91spx.com/static/web/js/web-sdk-v1.1.8.js?v=1.7.16 | 2494ms | 1056ms | 13ms | 1st |
| Unattributable | 1424ms | 203ms | 0ms | 1st |
| https://91spx.com/ | 858ms | 28ms | 7ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-74HKVR3SWR | 516ms | 448ms | 65ms | 3rd |
| https://mc.yandex.ru/metrika/tag.js?id=104970588 | 453ms | 400ms | 26ms | 3rd |
| https://91spx.com/static/web/js/web_tracker_v18.js?v=1.7.16 | 420ms | 351ms | 20ms | 1st |
| https://91spx.com/static/web/js/lib/require.js | 201ms | 173ms | 2ms | 1st |
| https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d87301792088814092 | 108ms | 68ms | 0ms | 3rd |
| https://91spx.com/static/web/js/lib/jquery.js?v=1.7.16 | 93ms | 73ms | 15ms | 1st |
DPage Weight InventoryAction107 resources · 4.3 MB · 199 KB savings availableFIX
Page Weight Inventory
Action107 resources · 4.3 MB · 199 KB savings available
107 resources · 4.3 MB · 199 KB savings available
Warning::
Page weight 4.3 MB exceeds 1 MB target by 3.3 MB
Got: 4.3 MB Expected: ≤ 1 MB
Info::
~199 KB of savings available
Warning::
68 third-party resources (82% of weight)
Info::
5 resources over 200KB
107 resources · 4.3 MiB · 68 third-party 3.3 MiB over 1MB target
Other 76% · 3.2 MiB
JavaScript 20% · 859.8 KiB
Image 3% · 116.2 KiB
Document 1% · 36.9 KiB
CSS 1% · 36.0 KiB
~198.7 KiB of savings available
Remove unused JavaScript: 198.7 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 107 resources | 4.3 MiB | ||||||
BImage Optimization26 images, 0 KB saveableREVIEW
Image Optimization
26 images, 0 KB saveable
26 images, 0 KB saveable
Info::
All images are well-optimized
26 images 76 KB
0 oversized -0 KB
6 legacy format
0 missing dimensions CLS risk
CJS BundlesAction24 scripts, 199 KB unusedREVIEW
JS Bundles
Action24 scripts, 199 KB unused
24 scripts, 199 KB unused
Warning::
https://91spx.com/static/web/js/lib/swiper.js?v=1....: 90 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-74HK...: 73 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://mc.yandex.ru/metrika/tag.js?id=104970588: 36 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 199 KB
199 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://91spx.com/static/web/js/lib/swiper.js?v=1.7.16 | 50 KB | 90 KB (61%) | ✓ | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-74HKVR3SWR | 179 KB | 73 KB (41%) | ✓ | 3rd |
| https://mc.yandex.ru/metrika/tag.js?id=104970588 | 70 KB | 36 KB (52%) | ✓ | 3rd |
| https://91spx.com/static/web/js/utils.js?v=1.7.16 | 3 KB | — | ✓ | 1st |
| https://91spx.com/static/web/js/common.js?v=1.7.16 | 7 KB | — | ✓ | 1st |
| https://91spx.com/static/web/js/lib/require.js | 8 KB | — | ✓ | 1st |
| https://91spx.com/static/web/js/web_tracker_v18.js?v=1.7.16 | 30 KB | — | ✓ | 1st |
| https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d87301792088814092 | 10 KB | — | ✓ | 3rd |
| https://91spx.com/static/web/js/web-sdk-v1.1.8.js?v=1.7.16 | 39 KB | — | ✓ | 1st |
| https://91spx.com/static/web/js/index_main.js?v=1.0.3 | 2 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
BMain HTML Cache-ControlMain HTML max-age=1200 (~20min)REVIEW
Main HTML Cache-Control
Main HTML max-age=1200 (~20min)
Main HTML max-age=1200 (~20min)
Info::
Main HTML cached for 20 minutes -- mild staleness risk
Got: public, max-age=1200, immutable
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
JavaScript Blocking
2 JS blocking issue(s) detected
2 JS blocking issue(s) detected
Warning::
3 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Warning::
Total JS execution time is 9.8 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.
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 Hints6 hints, 0 missing preconnectsPASS
Resource Hints
6 hints, 0 missing preconnects
6 hints, 0 missing preconnects
Info::
Page uses 6 resource hint(s)
Current Resource Hints
preconnect—
preload—
dns-prefetch—
prefetch 6
6 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-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: 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+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
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
CSS Performance Depth
No CSS performance depth issues detected
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
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
A+HTTP Cachingmax-age=1200 (20 minutes)PASS
HTTP Caching
max-age=1200 (20 minutes)
max-age=1200 (20 minutes)
Info::
Cache-Control header is set
Got: public, max-age=1200, immutable
Info::
Effective TTL: 20 minutes (max-age=1200)
Info::
Last-Modified header present
Cache-Control
public, max-age=1200, immutable
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| max-age | 1200 | Cache for 20 minutes |
| immutable | — | Content will never change |
Effective TTL: 1200 seconds
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 Waterfall107 requests over 4329msINFO
Network Waterfall
107 requests over 4329ms
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
11% of JavaScript execution is third-party
First-party Third-party 1077ms · 259KB · ¥53/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 516ms | 179 KB | 41% | ¥25/mo | Costly |
mc.yandex.ru mc.yandex.ru | Other | 453ms | 70 KB | 52% | ¥22/mo | Costly |
static.cloudflareinsights.com static.cloudflareinsights.com | Other | 108ms | 10 KB | — | ¥5/mo | Optional |
Google Tag Manager
Tag Manager
Execution 516ms
Transfer 179 KB
Unused 41%
Monthly Cost ¥25/mo
mc.yandex.ru
Other
Execution 453ms
Transfer 70 KB
Unused 52%
Monthly Cost ¥22/mo
static.cloudflareinsights.com
Other
Execution 108ms
Transfer 10 KB
Monthly Cost ¥5/mo
These scripts may cost more than they're worth
- Google Tag Manager adds 516ms and costs ~¥25/month
- mc.yandex.ru adds 453ms and costs ~¥22/month
Google Tag Manager takes 516ms 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
mc.yandex.ru takes 453ms 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
52% of mc.yandex.ru's code is unused. The script may be loading features you don't use.
Why this matters
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
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)
1749 ms
85% good
INP (p75)
84 ms
96% good
CLS (p75)
0.020
98% good
FCP (p75)
918 ms
TTFB (p75)
634 ms
This origin passes Core Web Vitals assessment
Image Optimization152 images, 512 KB total, 2 KB wastedINFO
Image Optimization
152 images, 512 KB total, 2 KB wasted
Image Optimization Audit
Total Images
152
Total Size
512 KB
Oversized
2
Wasted
2 KB
1 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.