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

Best Practices

100

SEO

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

1.05 s

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

1.53 s

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

60 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.170

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.30 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.

3.13 s

Page Load Progression

2.2 s

4.3 s

6.5 s

8.6 s

10.8 s

12.9 s

15.1 s

17.2 s

Checks

5 PASS 5 REVIEW 3 FIX

Third-Party Impact

Action

100% third-party, 0 ms blocking

FIX

100% third-party, 0 ms blocking

Third-party code accounts for 100% of page weight (1.9 MiB of 1.9 MiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

Page Weight Inventory

Action

129 resources · 1.9 MB · 224 KB savings available

FIX

129 resources · 1.9 MB · 224 KB savings available

Page weight 914 KB over 1MB target

Got: 1.9 MB Expected: ≤ 1 MB

~224 KB of savings available

128 third-party resources (100% of weight)

129 resources · 1.9 MiB · 128 third-party 913.6 KiB over 1MB target

Image 61% · 1.1 MiB

JavaScript 37% · 709.3 KiB

Document 2% · 35.6 KiB

CSS 1% · 12.7 KiB

Other 0% · 4.3 KiB

~223.7 KiB of savings available

Remove unused JavaScript: 223.7 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

129 resources			1.9 MiB

HTTP Caching

Action

No cache headers

FIX

No cache headers

No Cache-Control header found

Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

Page Weight Budget

Action

1.9 MB transferred, 129 requests

REVIEW

1.9 MB transferred, 129 requests

Page weighs 3.7 MB (1.9 MB transferred)

Images are 1.1 MB — compress or use modern formats

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

Got: 1.1 MB

JavaScript is 709 KB — consider code splitting or lazy loading

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Got: 709 KB

129 HTTP requests — consider bundling or reducing

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Estimated 0.40 g CO2 per page load

1.9 MB transferred

129 requests

0.40 g CO2 per page load

Images 1.1 MiB 61%

JavaScript 709.3 KiB 37%

HTML 30.8 KiB 2%

CSS 12.7 KiB 1%

Other 6.3 KiB 0%

Other 2.7 KiB 0%

Other 1.9 KiB 0%

0 2.4 MB 4.9 MB

Approaching limit

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

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

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.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

Image Optimization

87 images, 0 KB saveable

REVIEW

87 images, 0 KB saveable

All images are well-optimized

87 images 1.1 MB

0 oversized -0 KB

86 legacy format

0 missing dimensions CLS risk

JS Execution Cost

743ms total JS execution

REVIEW

743ms total JS execution

https://r2.drom.ru/js/bundles/home.f0d3deca3194339...: 272ms CPU time

Unattributable: 221ms CPU time

https://www.drom.ru/: 142ms CPU time

https://www.drom.ru/dpg/EIzKQn2Xj5LZbAdaVXyOkQgR2y...: 107ms CPU time

Third-party scripts: 743ms (100% of total)

Main Thread Breakdown

Script Evaluation 43% Other 27% Style & Layout 16% Script Parsing & Compilation 6% Rendering 4% Garbage Collection 4%

Script	Total	Scripting	Parse/Compile	Party
https://r2.drom.ru/js/bundles/home.f0d3deca31943392.js	272ms	182ms	9ms	3rd
Unattributable	221ms	5ms	0ms	3rd
https://www.drom.ru/	142ms	7ms	1ms	3rd
https://www.drom.ru/dpg/EIzKQn2Xj5LZbAdaVXyOkQgR2yYEM9zJ1vb6Tut-h1HH2bFl	107ms	89ms	12ms	3rd

JS Bundles

Action

18 scripts, 224 KB unused

REVIEW

18 scripts, 224 KB unused

https://www.drom.ru/dpg/?id=: 66 KB unused (52%)