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.
1.77 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.77 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
14 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.048
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.91 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.
2.92 s
Page Load Progression
375 ms 750 ms
1.1 s
1.5 s 1.9 s 2.2 s 2.6 s
3.0 sFPage Weight BudgetAction5.1 MB transferred, 212 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 BundlesAction83 scripts, 357 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://yastatic.net/partner-code-bundles/1304600/24ec1381af6bc52b.js | 130 KB | 104 KB (81%) | ✓ | 3rd |
| https://showcase-static.reg.ru/_nuxt/static/D8GZKfwo.js | 179 KB | 70 KB (40%) | ✓ | 3rd |
| https://showcase-static.reg.ru/_nuxt/static/uUESCGhJ.js | 108 KB | 58 KB (54%) | ✓ | 3rd |
| https://yandex.ru/ads/system/context.js | 105 KB | 54 KB (52%) | ✓ | 3rd |
| https://mc.yandex.ru/metrika/tag.js | 85 KB | 41 KB (49%) | ✓ | 3rd |
| https://showcase-static.reg.ru/_nuxt/static/Cu-m6_I5.js | 368 KB | 29 KB (8%) | ✓ | 3rd |
| https://showcase-static.reg.ru/_nuxt/static/BJ5q5135.js | 4 KB | — | ✓ | 3rd |
| https://showcase-static.reg.ru/_nuxt/static/CUimX1eA.js | 3 KB | — | ✓ | 3rd |
| https://showcase-static.reg.ru/_nuxt/static/CMNW9Efu.js | 0 KB | — | ✓ | 3rd |
| https://showcase-static.reg.ru/_nuxt/static/CTx-8f7P.js | 13 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 InventoryAction212 resources · 5.1 MB · 357 KB savings availableFIX
~356.8 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 212 resources | 5.1 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction31 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
CJS Execution CostAction1082ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.reg.ru/ | 298ms | 24ms | 0ms | 3rd |
| https://showcase-static.reg.ru/_nuxt/static/uUESCGhJ.js | 242ms | 205ms | 0ms | 3rd |
| Unattributable | 237ms | 42ms | 0ms | 3rd |
| https://showcase-static.reg.ru/_nuxt/static/D8GZKfwo.js | 132ms | 105ms | 1ms | 3rd |
| https://yandex.ru/ads/system/context.js | 112ms | 85ms | 23ms | 3rd |
| https://mc.yandex.ru/metrika/tag.js | 61ms | 42ms | 7ms | 3rd |
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 (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
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 Waterfall212 requests over 2917msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.reg.ru www.reg.ru | Other | 298ms | 69 KB | — | ₽155/mo | Costly |
showcase-static.reg.ru showcase-static.reg.ru | Other | 242ms | 108 KB | 54% | ₽126/mo | Costly |
Unattributable Unattributable | Other | 237ms | 0 KB | — | ₽123/mo | Costly |
showcase-static.reg.ru showcase-static.reg.ru | Other | 132ms | 179 KB | 40% | ₽69/mo | Costly |
yandex.ru yandex.ru | Other | 112ms | 105 KB | 52% | ₽58/mo | Costly |
mc.yandex.ru mc.yandex.ru | Other | 61ms | 85 KB | 49% | ₽32/mo | Optional |
These scripts may cost more than they're worth
- www.reg.ru adds 298ms and costs ~₽155/month
- showcase-static.reg.ru adds 242ms and costs ~₽126/month
- Unattributable adds 237ms and costs ~₽123/month
- showcase-static.reg.ru adds 132ms and costs ~₽69/month
- yandex.ru adds 112ms and costs ~₽58/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.reg.ru takes 298ms 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
showcase-static.reg.ru takes 242ms 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 showcase-static.reg.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
Unattributable takes 237ms 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
showcase-static.reg.ru takes 132ms 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 112ms 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
52% 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