Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop

Performance

Accessibility

100

Best Practices

SEO

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

436 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.25 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 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.

1.01 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.

1.25 s

Page Load Progression

450 ms

900 ms

1.4 s

1.8 s

2.2 s

2.7 s

3.1 s

3.6 s

Checks

6 PASS 5 REVIEW 2 FIX

Page Weight Budget

Action

5.6 MB transferred, 54 requests

FIX

5.6 MB transferred, 54 requests

Page weighs 8.6 MB (5.6 MB transferred)

Images are 3.0 MB — compress or use modern formats

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Got: 3.0 MB

Fonts are 319 KB — consider subsetting or using system fonts

Subset fonts to include only used characters, or switch to system font stacks.

Got: 319 KB

54 HTTP requests

Estimated 1.2 g CO2 per page load

5.6 MB transferred

54 requests

1.2 g CO2 per page load

Images 3.0 MiB 53%

Other 2.1 MiB 37%

Fonts 319.5 KiB 6%

Other 143.0 KiB 2%

JavaScript 100.3 KiB 2%

CSS 15.8 KiB 0%

HTML 6.8 KiB 0%

0 2.4 MB 4.9 MB

Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

Cache-Control: no-store prevents all caching

Intentional for dynamic content, but increases server load for every page view.

Got: no-store, no-cache, must-revalidate

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

no-store, no-cache, must-revalidate

Directive	Value	Meaning
no-store	—	Never cache this response
no-cache	—	Cache but always revalidate first
must-revalidate	—	Must recheck with server after expiry

Image Optimization

34 images, 0 KB saveable

REVIEW

34 images, 0 KB saveable

All images are well-optimized

34 images 3.0 MB

0 oversized -0 KB

34 legacy format

0 missing dimensions CLS risk

JS Execution Cost

546ms total JS execution

REVIEW

546ms total JS execution

https://crpt.ru/: 277ms CPU time

Unattributable: 270ms CPU time

Third-party scripts: 270ms (49% of total)

Main Thread Breakdown

Other 66% Style & Layout 17% Script Evaluation 10% Rendering 4%

Script	Total	Scripting	Parse/Compile	Party
https://crpt.ru/	277ms	2ms	1ms	1st
Unattributable	270ms	8ms	0ms	3rd

JS Bundles

4 scripts, 61 KB unused

REVIEW

4 scripts, 61 KB unused

https://crpt.ru/static/js/main97rkj.min.js: 61 KB unused (67%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 61 KB

61 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://crpt.ru/static/js/main97rkj.min.js	91 KB	61 KB (67%)	✓	1st
https://crpt.ru/static/js/separate-js/svg4everybody.min.js	1 KB	—	✓	1st
https://crpt.ru/static/js/simplebar.min.js	7 KB	—	✓	1st
https://crpt.ru/static/js/separate-js/site.js	1 KB	—	✓	1st

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Page Weight Inventory

Action

54 resources · 5.6 MB · 61 KB savings available

REVIEW

54 resources · 5.6 MB · 61 KB savings available

Page weight 4.6 MB over 1MB target

Got: 5.6 MB Expected: ≤ 1 MB

~61 KB of savings available

8 resources over 200KB

54 resources · 5.6 MiB · 0 third-party 4.6 MiB over 1MB target

Image 56% · 3.1 MiB

Media 37% · 2.1 MiB

Font 6% · 319.5 KiB

JavaScript 2% · 100.3 KiB

CSS 0% · 15.8 KiB

Document 0% · 6.8 KiB

~60.7 KiB of savings available

Remove unused JavaScript: 60.7 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

54 resources			5.6 MiB

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Third-Party Impact

No third-party resources

PASS

No third-party resources

No third-party resources detected

No third-party resources detected — all resources are first-party.

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

2 fonts (319 KB)

PASS

2 fonts (319 KB)

2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

319 KB total

Render-blocking

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

Circe-Bold.woff woff swap

Size 161 KB

Load time 57 ms

Start 717 ms

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need

Circe-Regular.woff woff swap

Size 159 KB

Load time 37 ms

Start 718 ms

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need

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 ~256 KB and ~512 ms

A+

Resource Caching

All resources properly cached

PASS

All resources properly cached

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

No optimization needed

PASS

No optimization needed

No resource hint issues

Network Waterfall

54 requests over 1411ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

49% of JavaScript execution is third-party

First-party Third-party 270ms · 0KB · ₽140/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	270ms	0 KB	—	₽140/mo	Costly

Unattributable

Other

Costly

Execution 270ms

Transfer 0 KB

Monthly Cost ₽140/mo

These scripts may cost more than they're worth

Unattributable adds 270ms and costs ~₽140/month

49% of JavaScript execution time comes from third-party scripts.

Why this matters

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 270ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.