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.
840 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.00 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
42 ms
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.
840 ms
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
1.57 s
Page Load Progression
430 ms
860 ms
1.3 s 1.7 s 2.2 s 2.6 s 3.0 s
3.4 sDThird-Party ImpactAction98% third-party, 0 ms blockingFIX
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CJS BundlesAction5 scripts, 234 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://yastatic.net/s3/clicker/1.23.0/main.ru.js | 145 KB | 103 KB (72%) | ✓ | 3rd |
| https://yastatic.net/s3/clicker/1.23.0/98.ru.js | 132 KB | 83 KB (63%) | ✓ | 3rd |
| https://mc.yandex.ru/metrika/tag.js | 85 KB | 48 KB (56%) | ✓ | 3rd |
| https://yastatic.net/s3/clicker/1.23.0/runtime.ru.js | 1 KB | — | ✓ | 3rd |
| https://yastatic.net/s3/clicker/1.23.0/critical-css.ru.js | 1 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
BPage Weight Inventory23 resources · 561 KB · 234 KB savings availableREVIEW
~233.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 23 resources | 561.2 KiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Page Weight Budget561 KB transferred, 23 requestsPASS
A+Text CompressionAll text resources are compressedPASS
AImage Optimization3 images, 0 KB saveablePASS
A+JS Execution Cost362ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://yastatic.net/s3/clicker/1.23.0/main.ru.js | 130ms | 105ms | 14ms | 3rd |
| https://mc.yandex.ru/metrika/tag.js | 91ms | 76ms | 11ms | 3rd |
| https://yastatic.net/s3/clicker/1.23.0/98.ru.js | 70ms | 40ms | 29ms | 3rd |
| Unattributable | 70ms | 12ms | 0ms | 3rd |
A+Font Loading2 fonts (76 KB)PASS
Web fonts
2
76 KB total
Render-blocking
0
of 2
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 Waterfall23 requests over 1598msINFO
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 | 130ms | 145 KB | 72% | ₽39/mo | Optional |
mc.yandex.ru mc.yandex.ru | Other | 91ms | 85 KB | 56% | ₽27/mo | Optional |
yastatic.net yastatic.net | Other | 70ms | 132 KB | 63% | ₽21/mo | Optional |
Unattributable Unattributable | Other | 70ms | 0 KB | — | ₽21/mo | Optional |
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
72% 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
56% 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
63% 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