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https://yandex.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
89
GRADE
B
FIX
2
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
79
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
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.

916 ms

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

3.06 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.

0.000

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

1.93 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.

3.06 s

Page Load Progression

696 ms
1.4 s
2.1 s
2.8 s
3.5 s
4.2 s
4.9 s
5.6 s
Checks
15
8 PASS 3 REVIEW 2 FIX
D
Third-Party Impact
Action
78% third-party, 0 ms blocking
FIX
78% third-party, 0 ms blocking
Warning::
Third-party code accounts for 78% of page weight (286.5 KiB of 369.6 KiB)
Info::
Third-party blocking time is low (0 ms)
22%
78%
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
B
Image Optimization
8 images, 0 KB saveable
REVIEW
8 images, 0 KB saveable
Info::
All images are well-optimized
8 images 12 KB
0 oversized -0 KB
8 legacy format
0 missing dimensions CLS risk
B
JS Bundles
6 scripts, 65 KB unused
REVIEW
6 scripts, 65 KB unused
Warning::
https://yastatic.net/s3/home-static/_/nova/3e31495...: 40 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://yastatic.net/react/19.2.1/react-with-dom.m...: 24 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 65 KB
65 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://yastatic.net/s3/home-static/_/nova/3e31495c2f9c7b16e35f0fe8199e71d40ddc441ff941825ff250bb7b3dbcb275.js67 KB40 KB (61%)✓3rd
https://yastatic.net/react/19.2.1/react-with-dom.min.js51 KB24 KB (48%)✓3rd
https://yastatic.net/s3/home-static/_/nova/BBDNVDGv.js29 KB—✓3rd
https://static-mon.yandex.net/static/main.js?pid=yandex.portal&cb=desktop29 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
370 KB transferred, 34 requests
PASS
370 KB transferred, 34 requests
Info::
Page weighs 1.3 MB (370 KB transferred)
Info::
34 HTTP requests
Info::
Estimated 0.08 g CO2 per page load
370 KB / 2.4 MB budget
370 KB transferred
34 requests
0.08 g CO2 per page load
JavaScript 200.0 KiB 54%
HTML 78.4 KiB 21%
Fonts 41.3 KiB 11%
Other 29.9 KiB 8%
Images 12.1 KiB 3%
Other 4.0 KiB 1%
Other 2.7 KiB 1%
Other 1.1 KiB 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+
JS Execution Cost
497ms total JS execution
PASS
497ms total JS execution
Warning::
https://yandex.com/: 253ms CPU time
Info::
Unattributable: 99ms CPU time
Info::
https://yastatic.net/react/19.2.1/react-with-dom.m...: 93ms CPU time
Info::
https://yastatic.net/s3/home-static/_/nova/3e31495...: 53ms CPU time
Info::
Third-party scripts: 245ms (49% of total)

Main Thread Breakdown

Other 38% Script Evaluation 35% Style & Layout 13% Script Parsing & Compilation 6% Rendering 5% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://yandex.com/253ms40ms8ms1st
Unattributable99ms1ms0ms3rd
https://yastatic.net/react/19.2.1/react-with-dom.min.js93ms72ms5ms3rd
https://yastatic.net/s3/home-static/_/nova/3e31495c2f9c7b16e35f0fe8199e71d40ddc441ff941825ff250bb7b3dbcb275.js53ms42ms6ms3rd
A+
Font Loading
1 fonts (41 KB)
PASS
1 fonts (41 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

41 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 FCP 916 ms LCP 3.1 shttps://yastatic.net/s3/home/fonts/ys/4/text-regular.woff2text-regular.woff2 https://yastatic.net/s3/home/fonts/ys/4/text-regular.woff2 — 41.3 KiB — 91 ms — font-display: swap
text-regular.woff2 woff2 swap
Size 41 KB
Load time 91 ms
Start 1.1 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
34 resources · 370 KB · 65 KB savings available
PASS
34 resources · 370 KB · 65 KB savings available
Info::
Within 1MB page-weight target
Got: 370 KB
Info::
~65 KB of savings available
Warning::
18 third-party resources (78% of weight)
34 resources · 369.6 KiB · 18 third-party Within 1MB page-weight target
JavaScript 62% · 228.9 KiB
Document 21% · 78.4 KiB
Font 11% · 41.3 KiB
Image 5% · 17.5 KiB
Other 1% · 3.4 KiB

~64.6 KiB of savings available

Remove unused JavaScript: 64.6 KiB
Network Waterfall
34 requests over 5551ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 916 ms LCP 3.1 shttps://yandex.com// https://yandex.com/ — 200 — 78.4 KiB — 1.1 s — h2https://yastatic.net/s3/home-static/_/nova/BBDNVDGv.jsyastatic.net/s3/home-static/_/nova/... https://yastatic.net/s3/home-static/_/nova/BBDNVDGv.js — 200 — 29.4 KiB — 308 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 — 447 ms — h2https://yastatic.net/s3/home-static/_/nova/3e31495c2f9c7b16e35f0fe8199e71d40ddc441ff941825ff250bb7b3dbcb275.jsyastatic.net/s3/home-static/_/nova/... https://yastatic.net/s3/home-static/_/nova/3e31495c2f9c7b16e35f0fe8199e71d40ddc441ff941825ff250bb7b3dbcb275.js — 200 — 66.8 KiB — 422 ms — h2https://yandex.com/portal/front/resources/desktop/manifest-en.json/portal/front/resources/desktop/man... https://yandex.com/portal/front/resources/desktop/manifest-en.json — 200 — 1.1 KiB — 256 ms — h2https://yastatic.net/s3/home/services/all/all_lite/Images_v3.svgyastatic.net/s3/home/services/all/a... https://yastatic.net/s3/home/services/all/all_lite/Images_v3.svg — 200 — 1.1 KiB — 217 ms — h2https://yastatic.net/s3/home/services/all/all_lite/Video_v3.svgyastatic.net/s3/home/services/all/a... https://yastatic.net/s3/home/services/all/all_lite/Video_v3.svg — 200 — 945 B — 219 ms — h2https://yastatic.net/s3/home/services/all/all_lite/Maps_v4.svgyastatic.net/s3/home/services/all/a... https://yastatic.net/s3/home/services/all/all_lite/Maps_v4.svg — 200 — 1.4 KiB — 220 ms — h2https://yastatic.net/s3/home/services/all/all_lite/Translate_v6.svgyastatic.net/s3/home/services/all/a... https://yastatic.net/s3/home/services/all/all_lite/Translate_v6.svg — 200 — 1.7 KiB — 225 ms — h2https://yastatic.net/s3/home/services/all/all_lite/Meteum.svgyastatic.net/s3/home/services/all/a... https://yastatic.net/s3/home/services/all/all_lite/Meteum.svg — 200 — 4.8 KiB — 234 ms — h2https://yastatic.net/s3/home/services/all/all_lite/Mail_v5.svgyastatic.net/s3/home/services/all/a... https://yastatic.net/s3/home/services/all/all_lite/Mail_v5.svg — 200 — 1.4 KiB — 237 ms — h2https://yastatic.net/s3/home/fonts/ys/4/text-regular.woff2yastatic.net/s3/home/fonts/ys/4/tex... https://yastatic.net/s3/home/fonts/ys/4/text-regular.woff2 — 200 — 41.3 KiB — 91 ms — h2https://yandex.com/suggest/suggest-ya.cgi?srv=morda_com_desktop&wiz=TrWth&uil=en&fact=1&v=4&icon=1&lr=102613&hl=1&bemjson=0&history=1&html=1&platform=desktop&rich_nav=1&show_experiment=224&verified_nav=1&rich_phone=1&use_favicon=1&nav_favicon=1&nav_text=1&mt_wizard=1&suggest_entity_desktop=1&entity_enrichment=1&entity_alignment_mode=bottom&sn=7&maybe_ads=1&yu=3379502021776359803&abtestids=1530607&yabsexp=1530607&yasm_testid=1530607&money_boosting_model=money_regressor_with_dssm_predict_Huber_delta_085_025&money_boosting_coeff=0.8&money_boosting_limit=3.8&money_boosting_thresh=0&money_log_fix=1&disable_ml_boosting_restriction=1&entity_max_count=2&svg=1&part=&pos=0&suggest_reqid=337950202177635980398042194913562&hs=undefined/suggest/suggest-ya.cgi?srv=morda_c... https://yandex.com/suggest/suggest-ya.cgi?srv=morda_com_desktop&wiz=TrWth&uil=en&fact=1&v=4&icon=1&lr=102613&hl=1&bemjson=0&history=1&html=1&platform=desktop&rich_nav=1&show_experiment=224&verified_nav=1&rich_phone=1&use_favicon=1&nav_favicon=1&nav_text=1&mt_wizard=1&suggest_entity_desktop=1&entity_enrichment=1&entity_alignment_mode=bottom&sn=7&maybe_ads=1&yu=3379502021776359803&abtestids=1530607&yabsexp=1530607&yasm_testid=1530607&money_boosting_model=money_regressor_with_dssm_predict_Huber_delta_085_025&money_boosting_coeff=0.8&money_boosting_limit=3.8&money_boosting_thresh=0&money_log_fix=1&disable_ml_boosting_restriction=1&entity_max_count=2&svg=1&part=&pos=0&suggest_reqid=337950202177635980398042194913562&hs=undefined — 200 — 331 B — 209 ms — h2https://static-mon.yandex.net/static/main.js?pid=yandex.portal&cb=desktopstatic-mon.yandex.net/static/main.j... https://static-mon.yandex.net/static/main.js?pid=yandex.portal&cb=desktop — 200 — 28.9 KiB — 868 ms — http/1.1https://yandex.com/clck/counter/clck/counter https://yandex.com/clck/counter — 200 — 250 B — 200 ms — h2https://mc.yandex.ru/metrika/watch_serp.jsmc.yandex.ru/metrika/watch_serp.js https://mc.yandex.ru/metrika/watch_serp.js — 200 — 27.2 KiB — 855 ms — h2https://yandex.com/clck/click/clck/click https://yandex.com/clck/click — 200 — 170 B — 196 ms — h2https://yandex.com/clck/counter/clck/counter https://yandex.com/clck/counter — 200 — 278 B — 203 ms — h2https://yandex.com/clck/click/clck/click https://yandex.com/clck/click — 200 — 170 B — 286 ms — h2https://yandex.com/clck/click/reqid=1776359803541188-231001276737950202-balancer-l7leveler-kubr-yp-klg-283-BAL/slots=681841,0,4;1530607,0,79/table=morda_baobab/clck/click/reqid=1776359803541188-... https://yandex.com/clck/click/reqid=1776359803541188-231001276737950202-balancer-l7leveler-kubr-yp-klg-283-BAL/slots=681841,0,4;1530607,0,79/table=morda_baobab — 200 — 171 B — 198 ms — h2https://mc.yandex.com/metrika/advert.gifmc.yandex.com/metrika/advert.gif https://mc.yandex.com/metrika/advert.gif — 200 — 232 B — 623 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%3A1570240709103%3Ahid%3A754922661%3Az%3A0%3Ai%3A20260416171645%3Aet%3A1776359805%3Ac%3A1%3Arn%3A144305386%3Arqn%3A1%3Au%3A1776359805110312209%3Aw%3A1350x940%3As%3A800x600x24%3Ask%3A1%3Aco%3A0%3Acpf%3A1%3Aeu%3A0%3Ans%3A1776359803054%3Ast%3A1776359805%3At%3AYandex%20%E2%80%94%20fast%20Internet%20search&t=rqnt(1)aw(1)rcm(1)yu(3379502021776359803)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%3A1570240709103%3Ahid%3A754922661%3Az%3A0%3Ai%3A20260416171645%3Aet%3A1776359805%3Ac%3A1%3Arn%3A144305386%3Arqn%3A1%3Au%3A1776359805110312209%3Aw%3A1350x940%3As%3A800x600x24%3Ask%3A1%3Aco%3A0%3Acpf%3A1%3Aeu%3A0%3Ans%3A1776359803054%3Ast%3A1776359805%3At%3AYandex%20%E2%80%94%20fast%20Internet%20search&t=rqnt(1)aw(1)rcm(1)yu(3379502021776359803)ti(2) — 302 — 1.4 KiB — 587 ms — h2https://yandex.com/clck/click/clck/click https://yandex.com/clck/click — 200 — 129 B — 201 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%3A1570240709103%3Ahid%3A754922661%3Az%3A0%3Ai%3A20260416171645%3Aet%3A1776359805%3Ac%3A1%3Arn%3A144305386%3Arqn%3A1%3Au%3A1776359805110312209%3Aw%3A1350x940%3As%3A800x600x24%3Ask%3A1%3Aco%3A0%3Acpf%3A1%3Aeu%3A0%3Ans%3A1776359803054%3Ast%3A1776359805%3At%3AYandex%20%E2%80%94%20fast%20Internet%20search&t=rqnt%281%29aw%281%29rcm%281%29yu%283379502021776359803%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%3A1570240709103%3Ahid%3A754922661%3Az%3A0%3Ai%3A20260416171645%3Aet%3A1776359805%3Ac%3A1%3Arn%3A144305386%3Arqn%3A1%3Au%3A1776359805110312209%3Aw%3A1350x940%3As%3A800x600x24%3Ask%3A1%3Aco%3A0%3Acpf%3A1%3Aeu%3A0%3Ans%3A1776359803054%3Ast%3A1776359805%3At%3AYandex%20%E2%80%94%20fast%20Internet%20search&t=rqnt%281%29aw%281%29rcm%281%29yu%283379502021776359803%29ti%282%29 — 200 — 609 B — 198 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 — 76 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 — 79 ms — h2https://yandex.com/clck/click/clck/click https://yandex.com/clck/click — 200 — 170 B — 203 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 — 127 ms — h2https://yandex.com/clck/counter/clck/counter https://yandex.com/clck/counter — 200 — 706 B — 195 ms — h2https://yandex.com/portal/set/any?sk=y4d653f5eb0feec9c7a39b7eb1f3bb545&gif=1&szm=1:800x600:1350x940/portal/set/any?sk=y4d653f5eb0feec9... https://yandex.com/portal/set/any?sk=y4d653f5eb0feec9c7a39b7eb1f3bb545&gif=1&szm=1:800x600:1350x940 — 200 — 485 B — 244 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 916 ms LCP 3.1 shttps://yandex.com// https://yandex.com/ — 200 — 78.4 KiB — 1.1 s — h2https://yastatic.net/s3/home-static/_/nova/BBDNVDGv.jsyastatic.net/s3/home-static/_/nova/... https://yastatic.net/s3/home-static/_/nova/BBDNVDGv.js — 200 — 29.4 KiB — 308 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 — 447 ms — h2https://yastatic.net/s3/home-static/_/nova/3e31495c2f9c7b16e35f0fe8199e71d40ddc441ff941825ff250bb7b3dbcb275.jsyastatic.net/s3/home-static/_/nova/... https://yastatic.net/s3/home-static/_/nova/3e31495c2f9c7b16e35f0fe8199e71d40ddc441ff941825ff250bb7b3dbcb275.js — 200 — 66.8 KiB — 422 ms — h2https://yandex.com/portal/front/resources/desktop/manifest-en.json/portal/front/resources/desktop/man... https://yandex.com/portal/front/resources/desktop/manifest-en.json — 200 — 1.1 KiB — 256 ms — h2https://yastatic.net/s3/home/services/all/all_lite/Images_v3.svgyastatic.net/s3/home/services/all/a... https://yastatic.net/s3/home/services/all/all_lite/Images_v3.svg — 200 — 1.1 KiB — 217 ms — h2https://yastatic.net/s3/home/services/all/all_lite/Video_v3.svgyastatic.net/s3/home/services/all/a... https://yastatic.net/s3/home/services/all/all_lite/Video_v3.svg — 200 — 945 B — 219 ms — h2https://yastatic.net/s3/home/services/all/all_lite/Maps_v4.svgyastatic.net/s3/home/services/all/a... https://yastatic.net/s3/home/services/all/all_lite/Maps_v4.svg — 200 — 1.4 KiB — 220 ms — h2https://yastatic.net/s3/home/services/all/all_lite/Translate_v6.svgyastatic.net/s3/home/services/all/a... https://yastatic.net/s3/home/services/all/all_lite/Translate_v6.svg — 200 — 1.7 KiB — 225 ms — h2https://yastatic.net/s3/home/services/all/all_lite/Meteum.svgyastatic.net/s3/home/services/all/a... https://yastatic.net/s3/home/services/all/all_lite/Meteum.svg — 200 — 4.8 KiB — 234 ms — h2https://yastatic.net/s3/home/services/all/all_lite/Mail_v5.svgyastatic.net/s3/home/services/all/a... https://yastatic.net/s3/home/services/all/all_lite/Mail_v5.svg — 200 — 1.4 KiB — 237 ms — h2https://yastatic.net/s3/home/fonts/ys/4/text-regular.woff2yastatic.net/s3/home/fonts/ys/4/tex... https://yastatic.net/s3/home/fonts/ys/4/text-regular.woff2 — 200 — 41.3 KiB — 91 ms — 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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 245ms · 117KB · ₽72/mo
Unattributable
Other
Optional
Execution 99ms
Transfer 0 KB
Monthly Cost ₽29/mo
yastatic.net
Other
Optional
Execution 93ms
Transfer 51 KB
Unused 48%
Monthly Cost ₽27/mo
yastatic.net
Other
Optional
Execution 53ms
Transfer 67 KB
Unused 61%
Monthly Cost ₽16/mo

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

61% 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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