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Performance

· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
3
REVIEW
7
PASS
13
INFO
2

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

Mobile Desktop
42
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
75
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
91
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.

2.90 s

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

12.01 s

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

1.07 s

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.

6.44 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.

12.24 s

Page Load Progression

496 ms
991 ms
1.5 s
2.0 s
2.5 s
3.0 s
3.5 s
4.0 s
Checks
25
13 PASS 7 REVIEW 3 FIX
F
JS Execution Cost
Action
6446ms total JS execution
FIX
6446ms total JS execution
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/cache/j...: 2843ms CPU time
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/: 2726ms CPU time
Warning::
Unattributable: 698ms CPU time
Info::
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/main...: 123ms CPU time
Info::
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/pull...: 56ms CPU time

Main Thread Breakdown

Style & Layout 38% Script Evaluation 23% Other 21% Rendering 10% Parse HTML & CSS 4% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/cache/js/s1/main/template_79c8fb3b4b9b075ef6b9ec9583d9ed97/template_79c8fb3b4b9b075ef6b9ec9583d9ed97_v1.js?17788415737865832843ms1266ms81ms1st
https://dev.xn--80avc2av3a.xn--p1ai/2726ms59ms42ms1st
Unattributable698ms12ms0ms1st
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/main/core/core.min.js?1771585171229643123ms94ms23ms1st
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/pull/protobuf/protobuf.js?177158516727405556ms18ms34ms1st
D
JS Bundles
Action
11 scripts, 253 KB unused
FIX
11 scripts, 253 KB unused
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/cache/j...: 134 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/main...: 47 KB unused (71%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/cache/j...: 40 KB unused (87%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/pull...: 31 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/pull...: unminified — 32 KB could be saved
Info::
Total unused JavaScript: 253 KB
253 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/cache/js/s1/main/template_79c8fb3b4b9b075ef6b9ec9583d9ed97/template_79c8fb3b4b9b075ef6b9ec9583d9ed97_v1.js?1778841573786583217 KB134 KB (62%)✓1st
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/main/core/core.min.js?177158517122964366 KB47 KB (71%)✓1st
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/cache/js/s1/main/kernel_main/kernel_main_v1.js?177884222319766447 KB40 KB (87%)✓1st
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/pull/protobuf/protobuf.js?177158516727405556 KB31 KB (57%)✗1st
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/pull/protobuf/model.min.js?1771585167141902 KB—✓1st
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/rest/client/rest.client.min.js?177158516992404 KB—✓1st
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/pull/client/pull.client.min.js?17715851674984913 KB—✓1st
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/main/popup/dist/main.popup.bundle.min.js?17715851756698614 KB—✓1st
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/currency/currency-core/dist/currency-core.bundle.min.js?177158516945692 KB—✓1st
https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/currency/core_currency.min.js?17715851698351 KB—✓1st

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

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-store, no-cache, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store, no-cache, must-revalidate

DirectiveValueMeaning
no-store—Never cache this response
no-cache—Cache but always revalidate first
must-revalidate—Must recheck with server after expiry
C
Page Weight Budget
Action
1.6 MB transferred, 46 requests
REVIEW
1.6 MB transferred, 46 requests
Info::
Page weighs 3.6 MB (1.6 MB transferred)
Info::
Fonts are 834 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 834 KB
Info::
46 HTTP requests
Info::
Estimated 0.34 g CO2 per page load
1.6 MB / 2.4 MB budget
1.6 MB transferred
46 requests
0.34 g CO2 per page load
Fonts 834.1 KiB 50%
JavaScript 443.2 KiB 27%
Images 209.9 KiB 13%
HTML 124.6 KiB 8%
Other 28.1 KiB 2%
CSS 16.4 KiB 1%
Other 4.3 KiB 0%
0 2.4 MB 4.9 MB
Approaching limit

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

C
Image Optimization
Action
18 images, 0 KB saveable
REVIEW
18 images, 0 KB saveable
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/upload/iblock/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/local/template... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/upload/iblock/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/local/template... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/upload/iblock/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/upload/iblock/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/local/template... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://dev.xn--80avc2av3a.xn--p1ai/local/template... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
18 images 210 KB
0 oversized -0 KB
14 legacy format
8 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
B
Compression Algorithm
Main response uses gzip; brotli would be ~20% smaller
REVIEW
Main response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
C
Page Weight Inventory
Action
46 resources · 1.6 MB · 253 KB savings available
REVIEW
46 resources · 1.6 MB · 253 KB savings available
Warning::
Page weight 1.6 MB exceeds 1 MB target by 637 KB
Got: 1.6 MB Expected: ≤ 1 MB
Info::
~253 KB of savings available
Info::
2 third-party resources (3% of weight)
Info::
4 resources over 200KB
46 resources · 1.6 MiB · 2 third-party 636.6 KiB over 1MB target
Font 50% · 834.1 KiB
JavaScript 27% · 443.2 KiB
Image 14% · 238.0 KiB
Document 8% · 128.9 KiB
CSS 1% · 16.4 KiB

~253.3 KiB of savings available

Remove unused JavaScript: 253.3 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
3% third-party, 0 ms blocking
PASS
3% third-party, 0 ms blocking
Info::
Third-party code accounts for 3% of page weight (54.7 KiB of 1.6 MiB)
Info::
Third-party blocking time is low (0 ms)
97%
First-party Third-party
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+
Font Loading
5 fonts (834 KB)
PASS
5 fonts (834 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

834 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 2.9 s LCP 12.0 shttps://dev.xn--80avc2av3a.xn--p1ai/local/templates/main/assets/fonts/NotoSans-Regular.woffNotoSans-Regular.woff https://dev.xn--80avc2av3a.xn--p1ai/local/templates/main/assets/fonts/NotoSans-Regular.woff — 241.0 KiB — 697 ms — font-display: swaphttps://dev.xn--80avc2av3a.xn--p1ai/local/templates/main/assets/fonts/NotoSans-Medium.woffNotoSans-Medium.woff https://dev.xn--80avc2av3a.xn--p1ai/local/templates/main/assets/fonts/NotoSans-Medium.woff — 298.7 KiB — 810 ms — font-display: swaphttps://dev.xn--80avc2av3a.xn--p1ai/local/templates/main/assets/fonts/NotoSans-Bold.woffNotoSans-Bold.woff https://dev.xn--80avc2av3a.xn--p1ai/local/templates/main/assets/fonts/NotoSans-Bold.woff — 239.8 KiB — 503 ms — font-display: swaphttps://fonts.gstatic.com/s/notosans/v41/o-0bIpQlx3QUlC5A4PNB6Ryti20_6n1iPHjc5ardu2ui.woff2o-0bIpQlx3QUlC5A4PNB6Ry... https://fonts.gstatic.com/s/notosans/v41/o-0bIpQlx3QUlC5A4PNB6Ryti20_6n1iPHjc5ardu2ui.woff2 — 19.6 KiB — 44 ms — font-display: swaphttps://fonts.gstatic.com/s/notosans/v41/o-0bIpQlx3QUlC5A4PNB6Ryti20_6n1iPHjc5a7duw.woff2o-0bIpQlx3QUlC5A4PNB6Ry... https://fonts.gstatic.com/s/notosans/v41/o-0bIpQlx3QUlC5A4PNB6Ryti20_6n1iPHjc5a7duw.woff2 — 35.0 KiB — 16 ms — font-display: swap
NotoSans-Regular.woff woff swap
Size 241 KB
Load time 697 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
NotoSans-Medium.woff woff swap
Size 299 KB
Load time 810 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
NotoSans-Bold.woff woff swap
Size 240 KB
Load time 503 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
o-0bIpQlx3QUlC5A4PNB6Ry... woff2 swap
Size 20 KB
Load time 44 ms
Start 1.6 s
Risk FOUT — text flashes from fallback to web font
o-0bIpQlx3QUlC5A4PNB6Ry... woff2 swap
Size 35 KB
Load time 16 ms
Start 1.6 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)

Fixing the unchecked items could save ~624 KB and ~1248 ms

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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
2
preload
—
dns-prefetch
—
prefetch
—

2 resource hints configured

A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-store, no-cache, must-revalidate
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
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
A
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
Total JS execution time is 6.4 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
A
CSS Performance Depth
1 CSS depth issue(s) detected
PASS
1 CSS depth issue(s) detected
Warning::
5 render-blocking stylesheet(s) -- recommended: <=3
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
Network Waterfall
46 requests over 4144ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 2.9 s LCP 12.0 shttps://dev.xn--80avc2av3a.xn--p1ai// https://dev.xn--80avc2av3a.xn--p1ai/ — 200 — 124.6 KiB — 1.3 s — http/1.1https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/ui/design-tokens/dist/ui.design-tokens.min.css?177158517823463/bitrix/js/ui/design-tokens/dist/ui... https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/ui/design-tokens/dist/ui.design-tokens.min.css?177158517823463 — 200 — 4.6 KiB — 189 ms — http/1.1https://dev.xn--80avc2av3a.xn--p1ai/bitrix/css/main/themes/blue/style.min.css?1771585119331/bitrix/css/main/themes/blue/style.... https://dev.xn--80avc2av3a.xn--p1ai/bitrix/css/main/themes/blue/style.min.css?1771585119331 — 200 — 696 B — 369 ms — http/1.1https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/ui/fonts/opensans/ui.font.opensans.min.css?17715851772320/bitrix/js/ui/fonts/opensans/ui.fon... https://dev.xn--80avc2av3a.xn--p1ai/bitrix/js/ui/fonts/opensans/ui.font.opensans.min.css?17715851772320 — 200 — 711 B — 491 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
200 images, 198 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

200

Total Size

198 KB

25 missing dimensions 192 missing lazy loading
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