Performance

· 17 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.

1.26 s

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

20.01 s

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

1.52 s

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

0.002

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

9.80 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.

23.41 s

Page Load Progression

697 ms

1.4 s

2.1 s

2.8 s

3.5 s

4.2 s

4.9 s

5.6 s

Checks

8 PASS 2 REVIEW 5 FIX

Page Weight Budget

Action

2.1 MB transferred, 382 requests

FIX

2.1 MB transferred, 382 requests

Page weighs 6.3 MB (2.1 MB transferred)

JavaScript is 1.5 MB — consider code splitting or lazy loading

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

Got: 1.5 MB

382 HTTP requests — consider bundling or reducing

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

Estimated 0.43 g CO2 per page load

2.1 MB transferred

382 requests

0.43 g CO2 per page load

JavaScript 1.5 MiB 73%

Images 238.6 KiB 11%

Other 171.4 KiB 8%

Other 65.2 KiB 3%

Other 30.2 KiB 1%

Fonts 26.1 KiB 1%

HTML 24.9 KiB 1%

CSS 6.9 KiB 0%

Other 5.9 KiB 0%

Other 0 B 0%

0 2.4 MB 4.9 MB

Approaching limit

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

Third-Party Impact

Action

98% third-party, 0 ms blocking

FIX

98% third-party, 0 ms blocking

Third-party code accounts for 98% of page weight (2.0 MiB of 2.1 MiB)

Third-party blocking time is low (0 ms)

98%

First-party Third-party

JS Execution Cost

Action

10535ms total JS execution

FIX

10535ms total JS execution

Unattributable: 1725ms CPU time

https://academic.ru/: 1291ms CPU time

https://static.a.mts.ru/id/pixel.js: 1030ms CPU time

https://static.kimberlite.io/js/thumbmark.umd.js: 883ms CPU time

https://s.luxcdn.com/t/202172/360_light.js: 838ms CPU time

Third-party scripts: 9244ms (88% of total)

Main Thread Breakdown

Script Evaluation 60% Other 21% Style & Layout 8% Script Parsing & Compilation 5% Rendering 3%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	1725ms	386ms	0ms	3rd
https://academic.ru/	1291ms	163ms	4ms	1st
https://static.a.mts.ru/id/pixel.js	1030ms	729ms	66ms	3rd
https://static.kimberlite.io/js/thumbmark.umd.js	883ms	851ms	0ms	3rd
https://s.luxcdn.com/t/202172/360_light.js	838ms	719ms	27ms	3rd
https://yandex.ru/ads/system/header-bidding.js	651ms	300ms	10ms	3rd
https://x01.aidata.io/lib/aidata.fp.latest.js?pixel=0892394	576ms	433ms	62ms	3rd
https://yandex.ru/ads/system/context.js	565ms	415ms	27ms	3rd
https://yandex.ru/ads/system/adsdk.js	547ms	490ms	11ms	3rd
https://ads.digitalcaramel.com/caramel.js?ts=1776896525507	500ms	417ms	14ms	3rd

Showing top 10 of 21 scripts

JS Bundles

Action

47 scripts, 569 KB unused

FIX

47 scripts, 569 KB unused

https://s.luxcdn.com/t/202172/360_light.js: 105 KB unused (83%)

Consider code splitting or tree shaking to reduce unused code.

https://yastatic.net/partner-code-bundles/1304651/...: 85 KB unused (66%)

Consider code splitting or tree shaking to reduce unused code.

https://ads.digitalcaramel.com/caramel.js?ts=17768...: 80 KB unused (48%)

Consider code splitting or tree shaking to reduce unused code.

https://www.googletagmanager.com/gtag/js?id=G-QXJR...: 62 KB unused (41%)

Consider code splitting or tree shaking to reduce unused code.

https://mc.yandex.ru/metrika/tag.js: 43 KB unused (51%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 569 KB

569 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://s.luxcdn.com/t/202172/360_light.js	127 KB	105 KB (83%)	✓	3rd
https://yastatic.net/partner-code-bundles/1304651/00cc0164cd639ddf.js	130 KB	85 KB (66%)	✓	3rd
https://ads.digitalcaramel.com/caramel.js?ts=1776896525507	167 KB	80 KB (48%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=G-QXJR5FPYJ8&cx=c&_slc=1	151 KB	62 KB (41%)	✓	3rd
https://mc.yandex.ru/metrika/tag.js	85 KB	43 KB (51%)	✓	3rd
https://yandex.ru/ads/system/context.js	104 KB	39 KB (37%)	✓	3rd
https://x01.aidata.io/lib/aidata.fp.latest.js?pixel=0892394	0 KB	34 KB (58%)	✓	3rd
https://x01.aidata.io/lib/aidata.fp.latest.js?pixel=0892394	60 KB	34 KB (58%)	✓	3rd
https://yastatic.net/partner-code-bundles/1304651/9c75e4fc5aa6da83.js	53 KB	34 KB (65%)	✓	3rd
https://ad.mail.ru/static/vk-adman.js?slot=1824555	70 KB	32 KB (45%)	✓	3rd

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

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

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

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

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

382 resources · 2.1 MB · 569 KB savings available

FIX

382 resources · 2.1 MB · 569 KB savings available

Page weight 1.1 MB over 1MB target

Got: 2.1 MB Expected: ≤ 1 MB

~569 KB of savings available

375 third-party resources (98% of weight)

1 resources over 200KB

382 resources · 2.1 MiB · 375 third-party 1.1 MiB over 1MB target

JavaScript 73% · 1.5 MiB

Other 12% · 254.4 KiB

Image 12% · 247.2 KiB

Document 2% · 32.6 KiB

Font 1% · 26.1 KiB

CSS 0% · 6.9 KiB

~568.7 KiB of savings available

Remove unused JavaScript: 568.7 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

382 resources			2.1 MiB

Image Optimization

89 images, 0 KB saveable

REVIEW

89 images, 0 KB saveable

All images are well-optimized

89 images 238 KB

0 oversized -0 KB

69 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+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

1 fonts (26 KB)

PASS

1 fonts (26 KB)

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

Web fonts

26 KB total

Render-blocking

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

text-variable-full.woff2 woff2 swap

Size 26 KB

Load time 255 ms

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+

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

15 hints, 0 missing preconnects

PASS

15 hints, 0 missing preconnects

Page uses 15 resource hint(s)

Current Resource Hints

preconnect

preload

dns-prefetch

prefetch

—

15 resource hints configured

A+

Render-Blocking Resources

No render-blocking resources detected

PASS

No render-blocking resources detected

No render-blocking resources detected in <head>

A+

Third-Party Resources

No third-party resources detected

PASS

No third-party resources detected

A+

HTTP Caching

max-age=1296000 (2 weeks)

PASS

max-age=1296000 (2 weeks)

Cache-Control header is set

Got: public, max-age=1296000

Effective TTL: 2 weeks (max-age=1296000)

Last-Modified header present

Cache-Control

public, max-age=1296000

Directive	Value	Meaning
public	—	Any cache may store this response
max-age	1296000	Cache for 2 weeks

Effective TTL: 1296000 seconds

Network Waterfall

382 requests over 38274ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

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

INFO

88% of JavaScript execution is third-party

First-party Third-party 9244ms · 1068KB · ₽2737/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	1725ms	0 KB	—	₽511/mo	Costly
static.a.mts.ru static.a.mts.ru	Other	1030ms	0 KB	—	₽305/mo	Costly
static.kimberlite.io static.kimberlite.io	Other	883ms	13 KB	—	₽261/mo	Costly
s.luxcdn.com s.luxcdn.com	Other	838ms	127 KB	83%	₽248/mo	Costly
yandex.ru yandex.ru	Other	651ms	38 KB	—	₽193/mo	Costly
x01.aidata.io x01.aidata.io	Other	576ms	0 KB	58%	₽171/mo	Costly
yandex.ru yandex.ru	Other	565ms	104 KB	37%	₽167/mo	Costly
yandex.ru yandex.ru	Other	547ms	28 KB	—	₽162/mo	Costly
ads.digitalcaramel.com ads.digitalcaramel.com	Other	500ms	167 KB	48%	₽148/mo	Costly
ad.mail.ru ad.mail.ru	Other	344ms	70 KB	45%	₽102/mo	Costly
yastatic.net yastatic.net	Other	317ms	53 KB	65%	₽94/mo	Costly
mc.yandex.ru mc.yandex.ru	Other	309ms	85 KB	51%	₽91/mo	Costly
yastatic.net yastatic.net	Other	237ms	32 KB	63%	₽70/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	172ms	151 KB	41%	₽51/mo	Costly
yastatic.net yastatic.net	Other	156ms	130 KB	66%	₽46/mo	Optional
content.adriver.ru content.adriver.ru	Other	105ms	16 KB	—	₽31/mo	Optional
privacy-cs.mail.ru privacy-cs.mail.ru	Other	101ms	22 KB	—	₽30/mo	Optional
Google Analytics www.google-analytics.com	Analytics	79ms	21 KB	—	₽23/mo	Optional
cdn-rtb.sape.ru cdn-rtb.sape.ru	Other	54ms	7 KB	—	₽16/mo	Optional
cdn-c.skcrtxr.com cdn-c.skcrtxr.com	Other	54ms	4 KB	—	₽16/mo	Optional

Unattributable

Other

Costly

Execution 1725ms

Transfer 0 KB

Monthly Cost ₽511/mo

static.a.mts.ru

Other

Costly

Execution 1030ms

Transfer 0 KB

Monthly Cost ₽305/mo

static.kimberlite.io

Other

Costly

Execution 883ms

Transfer 13 KB

Monthly Cost ₽261/mo

s.luxcdn.com

Other

Costly

Execution 838ms

Transfer 127 KB

Unused 83%

Monthly Cost ₽248/mo

yandex.ru

Other

Costly

Execution 651ms

Transfer 38 KB

Monthly Cost ₽193/mo

x01.aidata.io

Other

Costly

Execution 576ms

Transfer 0 KB

Unused 58%

Monthly Cost ₽171/mo

yandex.ru

Other

Costly

Execution 565ms

Transfer 104 KB

Unused 37%

Monthly Cost ₽167/mo

yandex.ru

Other

Costly

Execution 547ms

Transfer 28 KB

Monthly Cost ₽162/mo

ads.digitalcaramel.com

Other

Costly

Execution 500ms

Transfer 167 KB

Unused 48%

Monthly Cost ₽148/mo

ad.mail.ru

Other

Costly

Execution 344ms

Transfer 70 KB

Unused 45%

Monthly Cost ₽102/mo

yastatic.net

Other

Costly

Execution 317ms

Transfer 53 KB

Unused 65%

Monthly Cost ₽94/mo

mc.yandex.ru

Other

Costly

Execution 309ms

Transfer 85 KB

Unused 51%

Monthly Cost ₽91/mo

yastatic.net

Other

Costly

Execution 237ms

Transfer 32 KB

Unused 63%

Monthly Cost ₽70/mo

Google Tag Manager

Tag Manager

Costly

Execution 172ms

Transfer 151 KB

Unused 41%

Monthly Cost ₽51/mo

yastatic.net

Other

Optional

Execution 156ms

Transfer 130 KB

Unused 66%

Monthly Cost ₽46/mo

content.adriver.ru

Other

Optional

Execution 105ms

Transfer 16 KB

Monthly Cost ₽31/mo

privacy-cs.mail.ru

Other

Optional

Execution 101ms

Transfer 22 KB

Monthly Cost ₽30/mo

Google Analytics

Analytics

Optional

Execution 79ms

Transfer 21 KB

Monthly Cost ₽23/mo

cdn-rtb.sape.ru

Other

Optional

Execution 54ms

Transfer 7 KB

Monthly Cost ₽16/mo

cdn-c.skcrtxr.com

Other

Optional

Execution 54ms

Transfer 4 KB

Monthly Cost ₽16/mo

These scripts may cost more than they're worth

Unattributable adds 1725ms and costs ~₽511/month
static.a.mts.ru adds 1030ms and costs ~₽305/month
static.kimberlite.io adds 883ms and costs ~₽261/month
s.luxcdn.com adds 838ms and costs ~₽248/month
yandex.ru adds 651ms and costs ~₽193/month
x01.aidata.io adds 576ms and costs ~₽171/month
yandex.ru adds 565ms and costs ~₽167/month
yandex.ru adds 547ms and costs ~₽162/month
ads.digitalcaramel.com adds 500ms and costs ~₽148/month
ad.mail.ru adds 344ms and costs ~₽102/month
yastatic.net adds 317ms and costs ~₽94/month
mc.yandex.ru adds 309ms and costs ~₽91/month
yastatic.net adds 237ms and costs ~₽70/month
Google Tag Manager adds 172ms and costs ~₽51/month

88% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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

Unattributable takes 1725ms 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

static.a.mts.ru takes 1030ms 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

static.kimberlite.io takes 883ms 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

s.luxcdn.com takes 838ms 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

83% of s.luxcdn.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

yandex.ru takes 651ms 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

x01.aidata.io takes 576ms 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

58% of x01.aidata.io's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

yandex.ru takes 565ms 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

yandex.ru takes 547ms 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

ads.digitalcaramel.com takes 500ms 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

ad.mail.ru takes 344ms 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

yastatic.net takes 317ms 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

65% of yastatic.net's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

mc.yandex.ru takes 309ms 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

51% of mc.yandex.ru's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

yastatic.net takes 237ms 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

63% of yastatic.net's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

Google Tag Manager takes 172ms 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

66% of yastatic.net's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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.