Performance
· 24 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
616 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
13.65 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.44 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.013
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.13 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.
13.68 s
Page Load Progression
FPage Weight BudgetAction12.4 MB transferred, 181 requestsFIX
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction94% third-party, 0 ms blockingFIX
FJS Execution CostAction6986ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://91spx.com/static/web/js/plugins/lazyload.js?v=1.7.16 | 3011ms | 2812ms | 0ms | 1st |
| https://91spx.com/ | 2051ms | 9ms | 1ms | 1st |
| Unattributable | 1047ms | 208ms | 0ms | 1st |
| https://91spx.com/static/web/js/web-sdk-v1.1.8.js?v=1.7.16 | 274ms | 228ms | 3ms | 1st |
| https://mc.yandex.ru/metrika/tag.js?id=104970588 | 183ms | 166ms | 6ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-74HKVR3SWR | 145ms | 118ms | 21ms | 3rd |
| https://91spx.com/static/web/js/web_tracker_v18.js?v=1.7.16 | 123ms | 109ms | 2ms | 1st |
| https://91spx.com/static/web/js/lib/require.js | 80ms | 57ms | 1ms | 1st |
| https://91spx.com/static/web/js/lib/swiper.js?v=1.7.16 | 71ms | 47ms | 5ms | 1st |
DPage Weight InventoryAction181 resources · 12.4 MB · 287 KB savings availableFIX
~287.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 181 resources | 12.4 MiB | ||||||
BImage Optimization60 images, 0 KB saveableREVIEW
CJS BundlesAction25 scripts, 287 KB unusedREVIEW
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 | 0 KB | 90 KB (61%) | ✓ | 1st |
| 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 | 177 KB | 73 KB (41%) | ✓ | 3rd |
| https://mc.yandex.ru/metrika/tag.js?id=104970588 | 70 KB | 35 KB (51%) | ✓ | 3rd |
| https://91spx.com/static/web/js/utils.js?v=1.7.16 | 3 KB | — | ✓ | 1st |
| https://91spx.com/static/web/js/lib/crypto.js?v=1.7.16 | 26 KB | — | ✓ | 1st |
| https://91spx.com/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js | 1 KB | — | ✓ | 1st |
| https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d87301792088814092 | 10 KB | — | ✓ | 3rd |
| https://91spx.com/static/web/js/web_tracker_v18.js?v=1.7.16 | 30 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.
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.
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.
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.
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
A+Text CompressionAll text resources are compressedPASS
A+Font LoadingNo web fonts (system fonts)PASS
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+Document CompressionDocument response uses brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server-Timing Observability3 Server-Timing entries advertisedPASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
A+HTTP Cachingmax-age=1200 (20 minutes)PASS
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 |
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall181 requests over 18481msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
mc.yandex.ru mc.yandex.ru | Other | 183ms | 70 KB | 51% | ¥9/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 145ms | 177 KB | 41% | ¥7/mo | Optional |
51% of mc.yandex.ru's code is unused. The script may be loading features you don't use.
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
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
Image Optimization152 images, 512 KB total, 2 KB wastedINFO
Image Optimization Audit
Total Images
152
Total Size
512 KB
Oversized
2
Wasted
2 KB