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.
4.54 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
13.85 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.19 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.
5.74 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.
17.18 s
Page Load Progression
FPage Weight BudgetAction2.6 MB transferred, 199 requestsFIX
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
FJS Execution CostAction7252ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 1242ms | 41ms | 0ms | 3rd |
| https://privacy-cs.mail.ru/static/sync-loader.js | 1226ms | 821ms | 51ms | 3rd |
| https://m.ok.ru/mres/batch/js/common/f0a82b76/common.js | 1002ms | 309ms | 165ms | 3rd |
| https://m.ok.ru/mres/batch/js/head/f4d757e/head.js | 614ms | 507ms | 14ms | 3rd |
| https://m.ok.ru/mres/react/clips-fullscreen_dedf91f.js | 540ms | 388ms | 152ms | 3rd |
| https://m.ok.ru/mres/react/toast-manager_b464fc79.js | 411ms | 279ms | 122ms | 3rd |
| https://mc.yandex.ru/metrika/tag.js | 384ms | 324ms | 52ms | 3rd |
| https://m.ok.ru/mres/batch/js/reacte58fc505/vendors.js | 358ms | 48ms | 308ms | 3rd |
| https://m.ok.ru/ | 279ms | 60ms | 26ms | 3rd |
| https://m.ok.ru/mres/batch/js/photos6a361c01/photos.module.js | 214ms | 32ms | 181ms | 3rd |
Showing top 10 of 17 scripts
FJS BundlesAction27 scripts, 5.8 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://m.ok.ru/mres/batch/js/reacte58fc505/vendors.js | 0 KB | 1656 KB (94%) | ✓ | 3rd |
| https://m.ok.ru/mres/batch/js/reacte58fc505/vendors.js | 375 KB | 1656 KB (94%) | ✓ | 3rd |
| https://m.ok.ru/mres/batch/js/reacte58fc505/react-loader.js | 231 KB | 805 KB (88%) | ✓ | 3rd |
| https://m.ok.ru/mres/batch/js/reacte58fc505/react-loader.js | 0 KB | 805 KB (88%) | ✓ | 3rd |
| https://m.ok.ru/mres/batch/js/photos6a361c01/photos.module.js | 244 KB | 212 KB (87%) | ✓ | 3rd |
| https://m.ok.ru/mres/batch/js/registrationf815cd9a/landing.module.js | 227 KB | 200 KB (88%) | ✓ | 3rd |
| https://m.ok.ru/mres/batch/js/donate73192632/donate.module.js | 227 KB | 200 KB (88%) | ✓ | 3rd |
| https://m.ok.ru/mres/batch/js/common/f0a82b76/common.js | 226 KB | 161 KB (71%) | ✓ | 3rd |
| https://m.ok.ru/mres/react/clips-fullscreen_dedf91f.js | 179 KB | 97 KB (54%) | ✓ | 3rd |
| https://m.ok.ru/mres/react/toast-manager_b464fc79.js | 166 KB | 89 KB (54%) | ✓ | 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
FPage Weight InventoryAction199 resources · 2.6 MB · 5.8 MB savings availableFIX
~5.8 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 199 resources | 2.6 MiB | ||||||
BImage Optimization127 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachingno-cacheREVIEW
no-cache
| Directive | Value | Meaning |
|---|---|---|
| no-cache | — | Cache but always revalidate first |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (105 KB)PASS
Web fonts
3
105 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
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)
Fixing the unchecked items could save ~15 KB and ~30 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints64 hints, 0 missing preconnectsPASS
Current Resource Hints
64 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall199 requests over 3561msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 1242ms | 0 KB | — | ₽368/mo | Costly |
privacy-cs.mail.ru privacy-cs.mail.ru | Other | 1226ms | 22 KB | — | ₽363/mo | Costly |
m.ok.ru m.ok.ru | Other | 1002ms | 226 KB | 71% | ₽297/mo | Costly |
m.ok.ru m.ok.ru | Other | 614ms | 24 KB | — | ₽182/mo | Costly |
m.ok.ru m.ok.ru | Other | 540ms | 179 KB | 54% | ₽160/mo | Costly |
m.ok.ru m.ok.ru | Other | 411ms | 166 KB | 54% | ₽122/mo | Costly |
mc.yandex.ru mc.yandex.ru | Other | 384ms | 85 KB | 60% | ₽114/mo | Costly |
m.ok.ru m.ok.ru | Other | 358ms | 0 KB | 94% | ₽106/mo | Costly |
m.ok.ru m.ok.ru | Other | 279ms | 14 KB | — | ₽82/mo | Costly |
m.ok.ru m.ok.ru | Other | 214ms | 244 KB | 87% | ₽63/mo | Costly |
top-fwz1.mail.ru top-fwz1.mail.ru | Other | 190ms | 20 KB | — | ₽56/mo | Costly |
m.ok.ru m.ok.ru | Other | 188ms | 0 KB | 88% | ₽56/mo | Costly |
m.ok.ru m.ok.ru | Other | 165ms | 12 KB | — | ₽49/mo | Optional |
m.ok.ru m.ok.ru | Other | 154ms | 227 KB | 88% | ₽46/mo | Optional |
m.ok.ru m.ok.ru | Other | 147ms | 227 KB | 88% | ₽43/mo | Optional |
m.ok.ru m.ok.ru | Other | 80ms | 1 KB | — | ₽24/mo | Optional |
m.ok.ru m.ok.ru | Other | 59ms | 15 KB | — | ₽17/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 1242ms and costs ~₽368/month
- privacy-cs.mail.ru adds 1226ms and costs ~₽363/month
- m.ok.ru adds 1002ms and costs ~₽297/month
- m.ok.ru adds 614ms and costs ~₽182/month
- m.ok.ru adds 540ms and costs ~₽160/month
- m.ok.ru adds 411ms and costs ~₽122/month
- mc.yandex.ru adds 384ms and costs ~₽114/month
- m.ok.ru adds 358ms and costs ~₽106/month
- m.ok.ru adds 279ms and costs ~₽82/month
- m.ok.ru adds 214ms and costs ~₽63/month
- top-fwz1.mail.ru adds 190ms and costs ~₽56/month
- m.ok.ru adds 188ms and costs ~₽56/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
Unattributable takes 1242ms 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 1226ms 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
m.ok.ru takes 1002ms 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
71% of m.ok.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
m.ok.ru takes 614ms 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
m.ok.ru takes 540ms 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
54% of m.ok.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
m.ok.ru takes 411ms 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
54% of m.ok.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
mc.yandex.ru takes 384ms 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 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
m.ok.ru takes 358ms 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
94% of m.ok.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
m.ok.ru takes 279ms 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
m.ok.ru takes 214ms 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
87% of m.ok.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 190ms 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
m.ok.ru takes 188ms 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
88% of m.ok.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
88% of m.ok.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
88% of m.ok.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