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

SEO

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

729 ms

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

734 ms

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.

0.000

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

1.52 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.

734 ms

Page Load Progression

632 ms

1.3 s

1.9 s

2.5 s

3.2 s

3.8 s

4.4 s

5.1 s

Checks

9 PASS 2 REVIEW 2 FIX

Third-Party Impact

Action

99% third-party, 0 ms blocking

FIX

99% third-party, 0 ms blocking

Third-party code accounts for 99% of page weight (423.9 KiB of 426.8 KiB)

Third-party blocking time is low (0 ms)

99%

First-party Third-party

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-transform, no-store, no-cache, must-revalidate, max-age=0

ETag present — enables conditional (304) responses

Cache-Control

no-transform, no-store, no-cache, must-revalidate, max-age=0

Directive	Value	Meaning
no-transform	—
no-store	—	Never cache this response
no-cache	—	Cache but always revalidate first
must-revalidate	—	Must recheck with server after expiry
max-age	0	Cache for 0 seconds

Image Optimization

12 images, 0 KB saveable

REVIEW

12 images, 0 KB saveable

All images are well-optimized

12 images 100 KB

0 oversized -0 KB

11 legacy format

0 missing dimensions CLS risk

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Page Weight Budget

427 KB transferred, 33 requests

PASS

427 KB transferred, 33 requests

Page weighs 750 KB (427 KB transferred)

Fonts are 210 KB — consider subsetting or using system fonts

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

Got: 210 KB

33 HTTP requests

Estimated 0.09 g CO2 per page load

427 KB transferred

33 requests

0.09 g CO2 per page load

Fonts 210.0 KiB 49%

JavaScript 113.6 KiB 27%

Images 100.2 KiB 23%

HTML 2.2 KiB 1%

Other 686 B 0%

0 2.4 MB 4.9 MB

Under budget

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

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

JS Execution Cost

237ms total JS execution

PASS

237ms total JS execution

Unattributable: 151ms CPU time

https://2gis.ru/: 86ms CPU time

Third-party scripts: 151ms (64% of total)

Main Thread Breakdown

Other 61% Style & Layout 21% Rendering 8% Parse HTML & CSS 4% Garbage Collection 4%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	151ms	2ms	0ms	3rd
https://2gis.ru/	86ms	2ms	0ms	1st

A+

Font Loading

3 fonts (210 KB)

PASS

3 fonts (210 KB)

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

Web fonts

210 KB total

Render-blocking

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

SBSansText-Regular.woff2 woff2 swap

Size 67 KB

Load time 2.1 s

Start 1.5 s

Risk FOUT — text flashes from fallback to web font

SBSansText-Medium.woff2 woff2 swap

Size 71 KB

Load time 1.5 s

Start 1.5 s

Risk FOUT — text flashes from fallback to web font

SBSansText-Semibold.woff2 woff2 swap

Size 72 KB

Load time 1.8 s

Start 1.5 s

Risk FOUT — text flashes from fallback to web font

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+

JS Bundles

16 scripts, 0 KB unused

PASS

16 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://d-assets.2gis.ru/core.ca8ad2fc0cc3616de117.js	40 KB	—	✓	3rd
https://d-assets.2gis.ru/9323.d1a98c913e692c2528b2.js	5 KB	—	✓	3rd
https://d-assets.2gis.ru/9259.b5a69e58498ab22b6b88.js	4 KB	—	✓	3rd
https://d-assets.2gis.ru/dashboard.942927d35cc058baea33.js	11 KB	—	✓	3rd
https://d-assets.2gis.ru/interestingCarousel.58de7f2c3eb4bd286535.js	5 KB	—	✓	3rd
https://d-assets.2gis.ru/7765.c3ab74fed07e1f9863ea.js	4 KB	—	✓	3rd
https://d-assets.2gis.ru/mediaViewer.f832c5fecdf577a6d3bb.js	11 KB	—	✓	3rd
https://d-assets.2gis.ru/storyViewer.15b6b097db24f9383a84.js	11 KB	—	✓	3rd
https://d-assets.2gis.ru/friendsOnMapMarkers.75df60f94404fd3181c0.js	1 KB	—	✓	3rd
https://d-assets.2gis.ru/5774.673051b67fee0208ccc6.js	3 KB	—	✓	3rd

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

Page Weight Inventory

33 resources · 427 KB · 0 KB savings available

PASS

33 resources · 427 KB · 0 KB savings available

Within 1MB page-weight target

Got: 427 KB

30 third-party resources (99% of weight)

33 resources · 426.8 KiB · 30 third-party Within 1MB page-weight target

Font 49% · 210.0 KiB

JavaScript 27% · 113.6 KiB

Image 23% · 100.2 KiB

Document 1% · 2.2 KiB

Other 0% · 686 B

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

33 resources			426.8 KiB

Network Waterfall

33 requests over 5024ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

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

INFO

64% of JavaScript execution is third-party

First-party Third-party 151ms · 0KB · ₽45/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	151ms	0 KB	—	₽45/mo	Optional

Unattributable

Other

Optional

Execution 151ms

Transfer 0 KB

Monthly Cost ₽45/mo

64% 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

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.