Performance
· 15 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.
798 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.11 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.046
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.81 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.
3.13 s
Page Load Progression
FPage Weight BudgetAction2.8 MB transferred, 129 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
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 ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction2144ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://yastatic.net/partner-code-bundles/1304651/vas-bundles/bundles-es2017/loader.bundle.js | 790ms | 521ms | 16ms | 3rd |
| Unattributable | 276ms | 8ms | 0ms | 3rd |
| https://yandex.ru/ads/system/context.js | 260ms | 208ms | 8ms | 3rd |
| https://yastatic.net/partner-code-bundles/1304651/22d10f9d8e892aab.js | 248ms | 184ms | 3ms | 3rd |
| https://www.interfax.ru/ | 183ms | 17ms | 2ms | 3rd |
| https://top-fwz1.mail.ru/js/code.js | 180ms | 156ms | 1ms | 3rd |
| https://yastatic.net/partner-code-bundles/1304651/00cc0164cd639ddf.js | 81ms | 47ms | 18ms | 3rd |
| https://privacy-cs.mail.ru/static/sync-loader.js | 72ms | 61ms | 2ms | 3rd |
| https://mc.yandex.ru/metrika/tag.js | 54ms | 46ms | 5ms | 3rd |
DPage Weight InventoryAction129 resources · 2.8 MB · 250 KB savings availableFIX
~250.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 129 resources | 2.8 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction54 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
CJS BundlesAction15 scripts, 250 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://yastatic.net/partner-code-bundles/1304651/vas-bundles/bundles-es2017/loader.bundle.js | 207 KB | 90 KB (44%) | ✓ | 3rd |
| https://yastatic.net/partner-code-bundles/1304651/00cc0164cd639ddf.js | 130 KB | 78 KB (60%) | ✓ | 3rd |
| https://mc.yandex.ru/metrika/tag.js | 85 KB | 43 KB (51%) | ✓ | 3rd |
| https://yandex.ru/ads/system/context.js | 105 KB | 39 KB (38%) | ✓ | 3rd |
| https://top-fwz1.mail.ru/js/code.js | 20 KB | — | ✓ | 3rd |
| https://www.interfax.ru/js/unobtrusive-ajax-nano.js?v=6OLjz9GbA4BSVq_s7NYB4ioSwY7QpbxLF4WMc01BrDo | 2 KB | — | ✓ | 3rd |
| https://www.interfax.ru/js/script.js?v=mDZLVhj5Ha2huk69sF9j5wlZBOkYTyM8E7-vC-yPc7s | 22 KB | — | ✓ | 3rd |
| https://yastatic.net/safeframe-bundles/0.83/host.js | 9 KB | — | ✓ | 3rd |
| https://yastatic.net/partner-code-bundles/1304651/22d10f9d8e892aab.js | 32 KB | — | ✓ | 3rd |
| https://privacy-cs.mail.ru/static/sync-loader.js | 22 KB | — | ✓ | 3rd |
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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (64 KB)PASS
Web fonts
3
64 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
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+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall129 requests over 24221msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
yastatic.net yastatic.net | Other | 790ms | 207 KB | 44% | ₽234/mo | Costly |
Unattributable Unattributable | Other | 276ms | 0 KB | — | ₽82/mo | Costly |
yandex.ru yandex.ru | Other | 260ms | 105 KB | 38% | ₽77/mo | Costly |
yastatic.net yastatic.net | Other | 248ms | 32 KB | — | ₽73/mo | Costly |
www.interfax.ru www.interfax.ru | Other | 183ms | 19 KB | — | ₽54/mo | Costly |
top-fwz1.mail.ru top-fwz1.mail.ru | Other | 180ms | 20 KB | — | ₽53/mo | Costly |
yastatic.net yastatic.net | Other | 81ms | 130 KB | 60% | ₽24/mo | Optional |
privacy-cs.mail.ru privacy-cs.mail.ru | Other | 72ms | 22 KB | — | ₽21/mo | Optional |
mc.yandex.ru mc.yandex.ru | Other | 54ms | 85 KB | 51% | ₽16/mo | Optional |
These scripts may cost more than they're worth
- yastatic.net adds 790ms and costs ~₽234/month
- Unattributable adds 276ms and costs ~₽82/month
- yandex.ru adds 260ms and costs ~₽77/month
- yastatic.net adds 248ms and costs ~₽73/month
- www.interfax.ru adds 183ms and costs ~₽54/month
- top-fwz1.mail.ru adds 180ms and costs ~₽53/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾ ▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
yastatic.net takes 790ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 276ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
yandex.ru takes 260ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
yastatic.net takes 248ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
www.interfax.ru takes 183ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
top-fwz1.mail.ru takes 180ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
60% of yastatic.net'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
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