Performance
· 17 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.
4.62 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
11.94 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.38 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.103
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
8.81 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.
11.94 s
Page Load Progression
652 ms 1.3 s 2.0 s 2.6 s
3.3 s
3.9 s 4.6 s
5.2 sDThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction5931ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.kommersant.ru/ | 1076ms | 31ms | 20ms | 3rd |
| https://yandex.ru/ads/system/context.js | 936ms | 622ms | 61ms | 3rd |
| https://top-fwz1.mail.ru/js/code.js | 840ms | 555ms | 7ms | 3rd |
| Unattributable | 694ms | 45ms | 0ms | 3rd |
| https://iv.kommersant.ru/ContentFlex/Redesign2020/kom2021.commonAsyncJS.js?2604171836405483 | 466ms | 257ms | 21ms | 3rd |
| https://privacy-cs.mail.ru/static/sync-loader.js | 419ms | 363ms | 12ms | 3rd |
| https://mc.yandex.ru/metrika/tag.js | 289ms | 240ms | 36ms | 3rd |
| https://iv.kommersant.ru/ContentFlex/Redesign2020/kom2021.commonJS.js?2604171836405513 | 225ms | 173ms | 19ms | 3rd |
| https://yastatic.net/partner-code-bundles/1304651/00cc0164cd639ddf.js | 219ms | 127ms | 91ms | 3rd |
| https://im2.kommersant.ru/ContentFlex/Redesign2020/kom2021.lazyChunks/jquery.slider-b5f1b06607489a8da8d9.js | 184ms | 125ms | 3ms | 3rd |
Showing top 10 of 15 scripts
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BPage Weight Budget1.1 MB transferred, 76 requestsREVIEW
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
BImage Optimization26 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
CJS BundlesAction20 scripts, 258 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://yastatic.net/partner-code-bundles/1304651/00cc0164cd639ddf.js | 130 KB | 105 KB (81%) | ✓ | 3rd |
| https://yandex.ru/ads/system/context.js | 105 KB | 53 KB (51%) | ✓ | 3rd |
| https://mc.yandex.ru/metrika/tag.js | 85 KB | 43 KB (51%) | ✓ | 3rd |
| https://iv.kommersant.ru/ContentFlex/Redesign2020/kom2021.lentaVue.js?2604171836405543 | 67 KB | 37 KB (55%) | ✓ | 3rd |
| https://iv.kommersant.ru/ContentFlex/Redesign2020/kom2021.commonJS.js?2604171836405513 | 48 KB | 20 KB (43%) | ✓ | 3rd |
| https://im2.kommersant.ru/ContentFlex/Redesign2020/kom2021.lazyChunks/pushPopup_desktop~lazyChunks/pushPopup_mobile-9cf852ebbec6e29c1767.js | 5 KB | — | ✓ | 3rd |
| https://im2.kommersant.ru/ContentFlex/Redesign2020/kom2021.lazyChunks/jquery.slider-b5f1b06607489a8da8d9.js | 8 KB | — | ✓ | 3rd |
| https://top-fwz1.mail.ru/js/code.js | 20 KB | — | ✓ | 3rd |
| https://iv.kommersant.ru/ContentFlex/Redesign2020/kom2021.main.js?2604171836405549 | 15 KB | — | ✓ | 3rd |
| https://im2.kommersant.ru/ContentFlex/Redesign2020/kom2021.vendors~lazyChunks/pushPopup_desktop~lazyChunks/pushPopup_mobile-646f62923652e79f1db9.js | 8 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
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
BPage Weight Inventory76 resources · 1.1 MB · 258 KB savings availableREVIEW
~258.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 76 resources | 1.1 MiB | ||||||
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 (147 KB)PASS
Web fonts
3
147 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 Hints9 hints, 0 missing preconnectsPASS
Current Resource Hints
9 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall76 requests over 7509msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.kommersant.ru www.kommersant.ru | Other | 1076ms | 62 KB | — | ₽319/mo | Costly |
yandex.ru yandex.ru | Other | 936ms | 105 KB | 51% | ₽277/mo | Costly |
top-fwz1.mail.ru top-fwz1.mail.ru | Other | 840ms | 20 KB | — | ₽249/mo | Costly |
Unattributable Unattributable | Other | 694ms | 0 KB | — | ₽205/mo | Costly |
iv.kommersant.ru iv.kommersant.ru | Other | 466ms | 46 KB | — | ₽138/mo | Costly |
privacy-cs.mail.ru privacy-cs.mail.ru | Other | 419ms | 22 KB | — | ₽124/mo | Costly |
mc.yandex.ru mc.yandex.ru | Other | 289ms | 85 KB | 51% | ₽86/mo | Costly |
iv.kommersant.ru iv.kommersant.ru | Other | 225ms | 48 KB | 43% | ₽67/mo | Costly |
yastatic.net yastatic.net | Other | 219ms | 130 KB | 81% | ₽65/mo | Costly |
im2.kommersant.ru im2.kommersant.ru | Other | 184ms | 8 KB | — | ₽54/mo | Costly |
iv.kommersant.ru iv.kommersant.ru | Other | 152ms | 67 KB | 55% | ₽45/mo | Optional |
yastatic.net yastatic.net | Other | 152ms | 32 KB | — | ₽45/mo | Optional |
iv.kommersant.ru iv.kommersant.ru | Other | 119ms | 9 KB | — | ₽35/mo | Optional |
iv.kommersant.ru iv.kommersant.ru | Other | 94ms | 15 KB | — | ₽28/mo | Optional |
yastatic.net yastatic.net | Other | 67ms | 6 KB | — | ₽20/mo | Optional |
These scripts may cost more than they're worth
- www.kommersant.ru adds 1076ms and costs ~₽319/month
- yandex.ru adds 936ms and costs ~₽277/month
- top-fwz1.mail.ru adds 840ms and costs ~₽249/month
- Unattributable adds 694ms and costs ~₽205/month
- iv.kommersant.ru adds 466ms and costs ~₽138/month
- privacy-cs.mail.ru adds 419ms and costs ~₽124/month
- mc.yandex.ru adds 289ms and costs ~₽86/month
- iv.kommersant.ru adds 225ms and costs ~₽67/month
- yastatic.net adds 219ms and costs ~₽65/month
- im2.kommersant.ru adds 184ms and costs ~₽54/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
www.kommersant.ru takes 1076ms 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 936ms 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
51% of 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
top-fwz1.mail.ru takes 840ms 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 694ms 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
iv.kommersant.ru takes 466ms 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
privacy-cs.mail.ru takes 419ms 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
mc.yandex.ru takes 289ms 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
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
iv.kommersant.ru takes 225ms 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 219ms 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
81% 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
im2.kommersant.ru takes 184ms 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
55% of iv.kommersant.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