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.
6.99 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
13.37 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
650 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.99 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.
13.45 s
Page Load Progression
FPage Weight BudgetAction2.7 MB transferred, 69 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
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
Source: web.dev
DThird-Party ImpactAction96% third-party, 0 ms blockingFIX
FJS Execution CostAction3529ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://boosty.to/ | 1278ms | 29ms | 72ms | 1st |
| Unattributable | 470ms | 55ms | 0ms | 3rd |
| https://privacy-cs.mail.ru/static/sync-loader.js | 268ms | 224ms | 9ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-KQ1D2YYTVG&l=GtmDataLayer&cx=c>m=4e64k1 | 250ms | 199ms | 35ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-PM9D5LFL6M&l=GtmDataLayer&cx=c>m=4e64k1 | 246ms | 188ms | 42ms | 3rd |
| https://static-mobile.boosty.to/css/style.Dmew442G.css | 232ms | 0ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-TSQ743P&l=GtmDataLayer | 222ms | 184ms | 34ms | 3rd |
| https://top-fwz1.mail.ru/js/code.js | 208ms | 178ms | 4ms | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMA.js | 191ms | 149ms | 39ms | 3rd |
| https://mc.yandex.ru/metrika/tag.js | 164ms | 137ms | 19ms | 3rd |
DJS BundlesAction11 scripts, 303 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-PM9D5LFL6M&l=GtmDataLayer&cx=c>m=4e64k1 | 158 KB | 68 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-KQ1D2YYTVG&l=GtmDataLayer&cx=c>m=4e64k1 | 157 KB | 67 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-TSQ743P&l=GtmDataLayer | 147 KB | 66 KB (45%) | ✓ | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMA.js | 106 KB | 56 KB (54%) | ✓ | 3rd |
| https://mc.yandex.ru/metrika/tag.js | 85 KB | 46 KB (54%) | ✓ | 3rd |
| https://static-mobile.boosty.to/js/app.BlDAJ-rF.js | 0 KB | — | ✓ | 3rd |
| https://top-fwz1.mail.ru/js/code.js | 20 KB | — | ✓ | 3rd |
| https://analytics.tiktok.com/i18n/pixel/events.js?sdkid=CIAU3R3C77UFB57U2LO0&lib=ttq | 3 KB | — | ✓ | 3rd |
| https://privacy-cs.mail.ru/static/sync-loader.js | 22 KB | — | ✓ | 3rd |
| https://top-fwz1.mail.ru/js/dyn-goal-config.js?ids=3119464 | 2 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
DPage Weight InventoryAction69 resources · 2.7 MB · 303 KB savings availableFIX
~302.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 69 resources | 2.7 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
no-store
| Directive | Value | Meaning |
|---|---|---|
| no-store | — | Never cache this response |
CImage OptimizationAction32 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
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 Loading6 fonts (439 KB)PASS
Web fonts
6
439 KB total
Render-blocking
0
of 6
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
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall69 requests over 3068msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 470ms | 0 KB | — | ₽139/mo | Costly |
privacy-cs.mail.ru privacy-cs.mail.ru | Other | 268ms | 22 KB | — | ₽79/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 250ms | 157 KB | 43% | ₽74/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 246ms | 158 KB | 43% | ₽73/mo | Costly |
static-mobile.boosty.to static-mobile.boosty.to | Other | 232ms | 317 KB | — | ₽69/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 222ms | 147 KB | 45% | ₽66/mo | Costly |
top-fwz1.mail.ru top-fwz1.mail.ru | Other | 208ms | 20 KB | — | ₽62/mo | Costly |
analytics.tiktok.com analytics.tiktok.com | Other | 191ms | 106 KB | 54% | ₽57/mo | Costly |
mc.yandex.ru mc.yandex.ru | Other | 164ms | 85 KB | 54% | ₽49/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 470ms and costs ~₽139/month
- privacy-cs.mail.ru adds 268ms and costs ~₽79/month
- Google Tag Manager adds 250ms and costs ~₽74/month
- Google Tag Manager adds 246ms and costs ~₽73/month
- static-mobile.boosty.to adds 232ms and costs ~₽69/month
- Google Tag Manager adds 222ms and costs ~₽66/month
- top-fwz1.mail.ru adds 208ms and costs ~₽62/month
- analytics.tiktok.com adds 191ms and costs ~₽57/month
64% of JavaScript execution time comes from third-party scripts.
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾ ▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
Unattributable takes 470ms 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 268ms 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
Google Tag Manager takes 250ms 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
Google Tag Manager takes 246ms 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
static-mobile.boosty.to takes 232ms 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
Google Tag Manager takes 222ms 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 208ms 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
analytics.tiktok.com takes 191ms 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 analytics.tiktok.com'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
54% 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