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https://yandex.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
89
GRADE
B
FIX
2
REVIEW
3
PASS
10
INFO
2

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

Mobile Desktop
73
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

1.70 s

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

6.48 s

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

29 ms

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

0.028

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

5.00 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.

6.48 s

Page Load Progression

386 ms
773 ms
1.2 s
1.5 s
1.9 s
2.3 s
2.7 s
3.1 s
Checks
17
10 PASS 3 REVIEW 2 FIX
D
Third-Party Impact
Action
74% third-party, 0 ms blocking
FIX
74% third-party, 0 ms blocking
Warning::
Third-party code accounts for 74% of page weight (234.6 KiB of 319.2 KiB)
Info::
Third-party blocking time is low (0 ms)
26%
74%
First-party Third-party
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-cache,no-store,max-age=0,must-revalidate
Info::
Last-Modified header present
Cache-Control

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

DirectiveValueMeaning
no-cache—Cache but always revalidate first
no-store—Never cache this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
C
JS Execution Cost
Action
1873ms total JS execution
REVIEW
1873ms total JS execution
Warning::
https://yandex.com/: 818ms CPU time
Warning::
Unattributable: 330ms CPU time
Warning::
https://yastatic.net/react/19.2.1/react-with-dom.m...: 261ms CPU time
Warning::
https://yastatic.net/s3/home-static/_/nova/2271cd6...: 252ms CPU time
Info::
https://mc.yandex.ru/metrika/watch_serp.js: 75ms CPU time
Warning::
Third-party scripts: 1055ms (56% of total)

Main Thread Breakdown

Other 37% Script Evaluation 34% Style & Layout 13% Script Parsing & Compilation 7% Rendering 5% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://yandex.com/818ms106ms36ms1st
Unattributable330ms6ms0ms3rd
https://yastatic.net/react/19.2.1/react-with-dom.min.js261ms204ms21ms3rd
https://yastatic.net/s3/home-static/_/nova/2271cd66b87d65ae22db94a5b2bdc6b9d54c91c39b65083afe87cd2fb6ac57bd.js252ms182ms30ms3rd
https://mc.yandex.ru/metrika/watch_serp.js75ms57ms8ms3rd
https://yastatic.net/s3/home-static/_/nova/CJivoyG4.js73ms54ms14ms3rd
https://yastatic.net/s3/gdpr/v3/gdpr.js64ms27ms25ms3rd
B
JS Bundles
6 scripts, 71 KB unused
REVIEW
6 scripts, 71 KB unused
Warning::
https://yastatic.net/s3/home-static/_/nova/2271cd6...: 45 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://yastatic.net/react/19.2.1/react-with-dom.m...: 26 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 71 KB
71 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://yastatic.net/s3/home-static/_/nova/2271cd66b87d65ae22db94a5b2bdc6b9d54c91c39b65083afe87cd2fb6ac57bd.js69 KB45 KB (66%)✓3rd
https://yastatic.net/react/19.2.1/react-with-dom.min.js51 KB26 KB (53%)✓3rd
https://yastatic.net/s3/home-static/_/nova/CJivoyG4.js30 KB—✓3rd
https://an.yandex.ru/system/context.js1 KB—✓3rd
https://mc.yandex.ru/metrika/watch_serp.js27 KB—✓3rd
https://yastatic.net/s3/gdpr/v3/gdpr.js26 KB—✓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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
319 KB transferred, 26 requests
PASS
319 KB transferred, 26 requests
Info::
Page weighs 1.2 MB (319 KB transferred)
Info::
26 HTTP requests
Info::
Estimated 0.07 g CO2 per page load
319 KB / 2.4 MB budget
319 KB transferred
26 requests
0.07 g CO2 per page load
JavaScript 202.8 KiB 64%
HTML 79.4 KiB 25%
Fonts 26.1 KiB 8%
Other 4.1 KiB 1%
Other 3.5 KiB 1%
Other 1.8 KiB 1%
Other 826 B 0%
Images 716 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A
Image Optimization
2 images, 0 KB saveable
PASS
2 images, 0 KB saveable
Info::
All images are well-optimized
2 images 1 KB
0 oversized -0 KB
2 legacy format
0 missing dimensions CLS risk
A+
Font Loading
1 fonts (26 KB)
PASS
1 fonts (26 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

26 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 1.7 s LCP 6.5 shttps://yastatic.net/s3/home/fonts/ys/3/text-variable-full.woff2text-variable-full.woff2 https://yastatic.net/s3/home/fonts/ys/3/text-variable-full.woff2 — 26.1 KiB — 109 ms — font-display: swap
text-variable-full.woff2 woff2 swap
Size 26 KB
Load time 109 ms
Start 1.0 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
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
Page Weight Inventory
26 resources · 319 KB · 71 KB savings available
PASS
26 resources · 319 KB · 71 KB savings available
Info::
Within 1MB page-weight target
Got: 319 KB
Info::
~71 KB of savings available
Warning::
12 third-party resources (74% of weight)
26 resources · 319.2 KiB · 12 third-party Within 1MB page-weight target
JavaScript 64% · 203.6 KiB
Document 25% · 79.4 KiB
Font 8% · 26.1 KiB
Image 2% · 6.9 KiB
Other 1% · 3.2 KiB

~71.3 KiB of savings available

Remove unused JavaScript: 71.3 KiB
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
26 requests over 5564ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 1.7 s LCP 6.5 shttps://yandex.com// https://yandex.com/ — 200 — 79.4 KiB — 1.1 s — h2https://yastatic.net/s3/home-static/_/nova/CJivoyG4.jsyastatic.net/s3/home-static/_/nova/... https://yastatic.net/s3/home-static/_/nova/CJivoyG4.js — 200 — 29.9 KiB — 317 ms — h2https://yastatic.net/react/19.2.1/react-with-dom.min.jsyastatic.net/react/19.2.1/react-wit... https://yastatic.net/react/19.2.1/react-with-dom.min.js — 200 — 50.5 KiB — 419 ms — h2https://yastatic.net/s3/home-static/_/nova/2271cd66b87d65ae22db94a5b2bdc6b9d54c91c39b65083afe87cd2fb6ac57bd.jsyastatic.net/s3/home-static/_/nova/... https://yastatic.net/s3/home-static/_/nova/2271cd66b87d65ae22db94a5b2bdc6b9d54c91c39b65083afe87cd2fb6ac57bd.js — 200 — 69.1 KiB — 455 ms — h2https://yandex.com/portal/front/resources/touch/manifest-en.json/portal/front/resources/touch/manif... https://yandex.com/portal/front/resources/touch/manifest-en.json — 200 — 826 B — 254 ms — h2https://yastatic.net/s3/home/fonts/ys/3/text-variable-full.woff2yastatic.net/s3/home/fonts/ys/3/tex... https://yastatic.net/s3/home/fonts/ys/3/text-variable-full.woff2 — 200 — 26.1 KiB — 109 ms — h2https://yandex.com/suggest/suggest-endings?srv=morda_com_touch&wiz=TrWth&uil=en&fact=1&v=4&icon=1&mob=1&tpah=1&sn=7&bemjson=0&platform=touch&verified_nav=1&rich_phone=1&history=1&use_favicon=1&nav_favicon=1&wizard_icon=1&mt_wizard=1&stocks_wizard=1&stocks_detail_level=2&carousel=1&new_weather=1&funky_weather=1&nav_text=1&long_facts_view=1&fulltext_great_again=10&entity_max_count=1&hl=1&maybe_ads=1&yu=2876535861776359786&lr=102613&safeclick=1&skip_clickdaemon_host=1&abtestids=1530600&yabsexp=1530600&yasm_testid=1530600&svg=1&part=&pos=0&suggest_reqid=287653586177635978697872743696657&hs=undefined/suggest/suggest-endings?srv=morda_... https://yandex.com/suggest/suggest-endings?srv=morda_com_touch&wiz=TrWth&uil=en&fact=1&v=4&icon=1&mob=1&tpah=1&sn=7&bemjson=0&platform=touch&verified_nav=1&rich_phone=1&history=1&use_favicon=1&nav_favicon=1&wizard_icon=1&mt_wizard=1&stocks_wizard=1&stocks_detail_level=2&carousel=1&new_weather=1&funky_weather=1&nav_text=1&long_facts_view=1&fulltext_great_again=10&entity_max_count=1&hl=1&maybe_ads=1&yu=2876535861776359786&lr=102613&safeclick=1&skip_clickdaemon_host=1&abtestids=1530600&yabsexp=1530600&yasm_testid=1530600&svg=1&part=&pos=0&suggest_reqid=287653586177635978697872743696657&hs=undefined — 200 — 330 B — 209 ms — h2https://an.yandex.ru/system/context.jsan.yandex.ru/system/context.js https://an.yandex.ru/system/context.js — 200 — 878 B — 610 ms — h2https://yastatic.net/s3/home-static/_/nova/CXZ471pd.pngyastatic.net/s3/home-static/_/nova/... https://yastatic.net/s3/home-static/_/nova/CXZ471pd.png — 200 — 1.2 KiB — 216 ms — h2https://mc.yandex.ru/metrika/watch_serp.jsmc.yandex.ru/metrika/watch_serp.js https://mc.yandex.ru/metrika/watch_serp.js — 200 — 27.3 KiB — 878 ms — h2https://yastatic.net/s3/home/logos/manifest/yandex-en-192.pngyastatic.net/s3/home/logos/manifest... https://yastatic.net/s3/home/logos/manifest/yandex-en-192.png — 200 — 1.5 KiB — 215 ms — h2https://yandex.com/clck/click/clck/click https://yandex.com/clck/click — 200 — 262 B — 205 ms — h2https://yandex.com/clck/counter/clck/counter https://yandex.com/clck/counter — 200 — 566 B — 294 ms — h2https://yandex.com/clck/click/clck/click https://yandex.com/clck/click — 200 — 397 B — 299 ms — h2https://yandex.com/clck/click/reqid=1776359786586575-9049598693287653586-balancer-l7leveler-kubr-yp-klg-241-BAL/slots=1514996,0,92;1516759,0,14;1525395,0,99;1530131,0,19;1530600,0,66/table=morda_baobab/clck/click/reqid=1776359786586575-... https://yandex.com/clck/click/reqid=1776359786586575-9049598693287653586-balancer-l7leveler-kubr-yp-klg-241-BAL/slots=1514996,0,92;1516759,0,14;1525395,0,99;1530131,0,19;1530600,0,66/table=morda_baobab — 200 — 158 B — 280 ms — h2https://mc.yandex.com/metrika/advert.gifmc.yandex.com/metrika/advert.gif https://mc.yandex.com/metrika/advert.gif — 200 — 233 B — 613 ms — h2https://mc.yandex.com/watch/3?wmode=7&page-url=https%3A%2F%2Fyandex.com%2F&page-ref=&charset=utf-8&ut=noindex&browser-info=pv%3A1%3Avf%3A1h8a0283oo1wmanxkth2rcqqxbgd6%3Afu%3A0%3Aen%3Autf-8%3Ala%3Aen-US%3Av%3A2461%3Acn%3A1%3Adp%3A0%3Als%3A693866912321%3Ahid%3A5971678%3Az%3A0%3Ai%3A20260416171628%3Aet%3A1776359788%3Ac%3A1%3Arn%3A719210899%3Arqn%3A1%3Au%3A1776359788260022698%3Aw%3A412x823%3As%3A412x823x24%3Ask%3A1.75%3Aco%3A0%3Acpf%3A1%3Aeu%3A0%3Ans%3A1776359786099%3Ast%3A1776359788%3At%3AYandex%20%E2%80%94%20fast%20Internet%20search&t=rqnt(1)aw(1)rcm(1)yu(2876535861776359786)ti(2)mc.yandex.com/watch/3?wmode=7&page-... https://mc.yandex.com/watch/3?wmode=7&page-url=https%3A%2F%2Fyandex.com%2F&page-ref=&charset=utf-8&ut=noindex&browser-info=pv%3A1%3Avf%3A1h8a0283oo1wmanxkth2rcqqxbgd6%3Afu%3A0%3Aen%3Autf-8%3Ala%3Aen-US%3Av%3A2461%3Acn%3A1%3Adp%3A0%3Als%3A693866912321%3Ahid%3A5971678%3Az%3A0%3Ai%3A20260416171628%3Aet%3A1776359788%3Ac%3A1%3Arn%3A719210899%3Arqn%3A1%3Au%3A1776359788260022698%3Aw%3A412x823%3As%3A412x823x24%3Ask%3A1.75%3Aco%3A0%3Acpf%3A1%3Aeu%3A0%3Ans%3A1776359786099%3Ast%3A1776359788%3At%3AYandex%20%E2%80%94%20fast%20Internet%20search&t=rqnt(1)aw(1)rcm(1)yu(2876535861776359786)ti(2) — 302 — 1.5 KiB — 576 ms — h2https://yandex.com/clck/click/clck/click https://yandex.com/clck/click — 200 — 476 B — 196 ms — h2https://mc.yandex.com/watch/3/1?wmode=7&page-url=https%3A%2F%2Fyandex.com%2F&page-ref&charset=utf-8&ut=noindex&browser-info=pv%3A1%3Avf%3A1h8a0283oo1wmanxkth2rcqqxbgd6%3Afu%3A0%3Aen%3Autf-8%3Ala%3Aen-US%3Av%3A2461%3Acn%3A1%3Adp%3A0%3Als%3A693866912321%3Ahid%3A5971678%3Az%3A0%3Ai%3A20260416171628%3Aet%3A1776359788%3Ac%3A1%3Arn%3A719210899%3Arqn%3A1%3Au%3A1776359788260022698%3Aw%3A412x823%3As%3A412x823x24%3Ask%3A1.75%3Aco%3A0%3Acpf%3A1%3Aeu%3A0%3Ans%3A1776359786099%3Ast%3A1776359788%3At%3AYandex%20%E2%80%94%20fast%20Internet%20search&t=rqnt%281%29aw%281%29rcm%281%29yu%282876535861776359786%29ti%282%29mc.yandex.com/watch/3/1?wmode=7&pag... https://mc.yandex.com/watch/3/1?wmode=7&page-url=https%3A%2F%2Fyandex.com%2F&page-ref&charset=utf-8&ut=noindex&browser-info=pv%3A1%3Avf%3A1h8a0283oo1wmanxkth2rcqqxbgd6%3Afu%3A0%3Aen%3Autf-8%3Ala%3Aen-US%3Av%3A2461%3Acn%3A1%3Adp%3A0%3Als%3A693866912321%3Ahid%3A5971678%3Az%3A0%3Ai%3A20260416171628%3Aet%3A1776359788%3Ac%3A1%3Arn%3A719210899%3Arqn%3A1%3Au%3A1776359788260022698%3Aw%3A412x823%3As%3A412x823x24%3Ask%3A1.75%3Aco%3A0%3Acpf%3A1%3Aeu%3A0%3Ans%3A1776359786099%3Ast%3A1776359788%3At%3AYandex%20%E2%80%94%20fast%20Internet%20search&t=rqnt%281%29aw%281%29rcm%281%29yu%282876535861776359786%29ti%282%29 — 200 — 609 B — 199 ms — h2https://yastatic.net/s3/gdpr/v3/gdpr.jsyastatic.net/s3/gdpr/v3/gdpr.js https://yastatic.net/s3/gdpr/v3/gdpr.js — 200 — 25.9 KiB — 126 ms — h2https://yandex.com/portal/set/any?sk=y9c0503741a9e1e2fd2aba059726819fe&gif=1&szm=1_75:823x412:412x823/portal/set/any?sk=y9c0503741a9e1e2... https://yandex.com/portal/set/any?sk=y9c0503741a9e1e2fd2aba059726819fe&gif=1&szm=1_75:823x412:412x823 — 200 — 483 B — 236 ms — h2https://yandex.com/clck/counter/clck/counter https://yandex.com/clck/counter — 200 — 487 B — 195 ms — h2https://yandex.com/clck/click/reqid=1776359786586575-9049598693287653586-balancer-l7leveler-kubr-yp-klg-241-BAL/slots=1514996,0,92;1516759,0,14;1525395,0,99;1530131,0,19;1530600,0,66/table=morda_baobab/clck/click/reqid=1776359786586575-... https://yandex.com/clck/click/reqid=1776359786586575-9049598693287653586-balancer-l7leveler-kubr-yp-klg-241-BAL/slots=1514996,0,92;1516759,0,14;1525395,0,99;1530131,0,19;1530600,0,66/table=morda_baobab — 200 — 175 B — 203 ms — h2https://yandex.com/clck/click/clck/click https://yandex.com/clck/click — 200 — 653 B — 201 ms — h2https://yandex.com/clck/counter/clck/counter https://yandex.com/clck/counter — 200 — 276 B — 195 ms — h2https://yandex.com/clck/click/reqid=1776359786586575-9049598693287653586-balancer-l7leveler-kubr-yp-klg-241-BAL/slots=1514996,0,92;1516759,0,14;1525395,0,99;1530131,0,19;1530600,0,66/table=morda_baobab/clck/click/reqid=1776359786586575-... https://yandex.com/clck/click/reqid=1776359786586575-9049598693287653586-balancer-l7leveler-kubr-yp-klg-241-BAL/slots=1514996,0,92;1516759,0,14;1525395,0,99;1530131,0,19;1530600,0,66/table=morda_baobab — 200 — 160 B — 208 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
56% of JavaScript execution is third-party
First-party Third-party 1055ms · 203KB · ₽312/mo
Unattributable
Other
Costly
Execution 330ms
Transfer 0 KB
Monthly Cost ₽98/mo
yastatic.net
Other
Costly
Execution 261ms
Transfer 51 KB
Unused 53%
Monthly Cost ₽77/mo
yastatic.net
Other
Costly
Execution 252ms
Transfer 69 KB
Unused 66%
Monthly Cost ₽75/mo
mc.yandex.ru
Other
Optional
Execution 75ms
Transfer 27 KB
Monthly Cost ₽22/mo
yastatic.net
Other
Optional
Execution 73ms
Transfer 30 KB
Monthly Cost ₽22/mo
yastatic.net
Other
Optional
Execution 64ms
Transfer 26 KB
Monthly Cost ₽19/mo

These scripts may cost more than they're worth

  • Unattributable adds 330ms and costs ~₽98/month
  • yastatic.net adds 261ms and costs ~₽77/month
  • yastatic.net adds 252ms and costs ~₽75/month

56% 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 330ms 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 261ms 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

53% 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

yastatic.net takes 252ms 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.

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