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https://vkcsystems.com

Performance

· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
89
GRADE
B
FIX
1
REVIEW
7
PASS
15
INFO
2

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

99
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.

1.08 s

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

1.70 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.

2.71 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.

1.70 s

Page Load Progression

474 ms
947 ms
1.4 s
1.9 s
2.4 s
2.8 s
3.3 s
3.8 s
Checks
25
15 PASS 7 REVIEW 1 FIX
F
Page Weight Budget
Action
3.4 MB transferred, 20 requests
FIX
3.4 MB transferred, 20 requests
Warning::
Page weighs 3.5 MB (3.4 MB transferred)
Info::
20 HTTP requests
Info::
Estimated 0.72 g CO2 per page load
3.4 MB / 2.4 MB budget
3.4 MB transferred
20 requests
0.72 g CO2 per page load
Other 3.3 MiB 96%
Fonts 94.9 KiB 3%
HTML 10.5 KiB 0%
Images 8.2 KiB 0%
CSS 7.4 KiB 0%
JavaScript 4.7 KiB 0%
Other 2.4 KiB 0%
Other 191 B 0%
0 2.4 MB 4.9 MB
Over budget
B
JS Execution Cost
513ms total JS execution
REVIEW
513ms total JS execution
Warning::
Unattributable: 321ms CPU time
Info::
https://vkcsystems.com/: 192ms CPU time
Warning::
Third-party scripts: 321ms (63% of total)

Main Thread Breakdown

Other 63% Style & Layout 21% Script Evaluation 7% Rendering 5% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
Unattributable321ms10ms0ms3rd
https://vkcsystems.com/192ms12ms1ms1st
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.
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
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
20 resources · 3.4 MB · 0 KB savings available
REVIEW
20 resources · 3.4 MB · 0 KB savings available
Warning::
Page weight 3.4 MB exceeds 1 MB target by 2.4 MB
Got: 3.4 MB Expected: ≤ 1 MB
Info::
1 resources over 200KB
20 resources · 3.4 MiB · 0 third-party 2.4 MiB over 1MB target
Media 96% · 3.3 MiB
Font 3% · 94.9 KiB
Image 0% · 10.6 KiB
Document 0% · 10.5 KiB
CSS 0% · 7.4 KiB
JavaScript 0% · 4.7 KiB
Other 0% · 191 B
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
public, max-age=0, must-revalidate
REVIEW
public, max-age=0, must-revalidate
Info::
Cache-Control header is set
Got: public, max-age=0, must-revalidate
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

public, max-age=0, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-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
Image Optimization
8 images, 0 KB saveable
PASS
8 images, 0 KB saveable
Warning::
https://vkcsystems.com/logo.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
8 images 8 KB
0 oversized -0 KB
1 legacy format
1 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

A+
Font Loading
2 fonts (95 KB)
PASS
2 fonts (95 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

95 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s FCP 1.1 s LCP 1.7 shttps://vkcsystems.com/fonts/inter-400.woff2inter-400.woff2 https://vkcsystems.com/fonts/inter-400.woff2 — 47.5 KiB — 203 ms — font-display: swaphttps://vkcsystems.com/fonts/inter-700.woff2inter-700.woff2 https://vkcsystems.com/fonts/inter-700.woff2 — 47.4 KiB — 210 ms — font-display: swap
inter-400.woff2 woff2 swap
Size 47 KB
Load time 203 ms
Start 108 ms
Risk FOUT — text flashes from fallback to web font
inter-700.woff2 woff2 swap
Size 47 KB
Load time 210 ms
Start 108 ms
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
4 scripts, 0 KB unused
PASS
4 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://vkcsystems.com/_astro/index.astro_astro_type_script_index_0_lang.C5uO0JN0.js1 KB—✓1st
https://vkcsystems.com/menu.js1 KB—✓1st
https://vkcsystems.com/_astro/index.mnOVsBea.js2 KB—✓1st
https://vkcsystems.com/ed4035a4053774b9/script.js1 KB—✓1st
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+
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 max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: public, max-age=0, must-revalidate
A+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
Info::
Both `ETag` and `Last-Modified` present -- efficient revalidation supported
The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).
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
No render-blocking JS or document.write usage detected
PASS
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues detected
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Network Waterfall
20 requests over 1587ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 1.1 s LCP 1.7 shttps://vkcsystems.com// https://vkcsystems.com/ — 200 — 10.5 KiB — 94 ms — h2https://vkcsystems.com/fonts/inter-400.woff2/fonts/inter-400.woff2 https://vkcsystems.com/fonts/inter-400.woff2 — 200 — 47.5 KiB — 203 ms — h2https://vkcsystems.com/fonts/inter-700.woff2/fonts/inter-700.woff2 https://vkcsystems.com/fonts/inter-700.woff2 — 200 — 47.4 KiB — 210 ms — h2https://vkcsystems.com/_astro/about.dz1STQuR.css/_astro/about.dz1STQuR.css https://vkcsystems.com/_astro/about.dz1STQuR.css — 200 — 7.4 KiB — 173 ms — h2https://vkcsystems.com/logo.svg/logo.svg https://vkcsystems.com/logo.svg — 200 — 1.5 KiB — 161 ms — h2https://vkcsystems.com/_astro/index.astro_astro_type_script_index_0_lang.C5uO0JN0.js/_astro/index.astro_astro_type_scri... https://vkcsystems.com/_astro/index.astro_astro_type_script_index_0_lang.C5uO0JN0.js — 200 — 1014 B — 175 ms — h2https://vkcsystems.com/menu.js/menu.js https://vkcsystems.com/menu.js — 200 — 605 B — 184 ms — h2https://vkcsystems.com/hero-video.mp4/hero-video.mp4 https://vkcsystems.com/hero-video.mp4 — 206 — 3.3 MiB — 423 ms — h2https://vkcsystems.com/_astro/index.mnOVsBea.js/_astro/index.mnOVsBea.js https://vkcsystems.com/_astro/index.mnOVsBea.js — 200 — 1.6 KiB — 255 ms — h2https://vkcsystems.com/ed4035a4053774b9/script.js/ed4035a4053774b9/script.js https://vkcsystems.com/ed4035a4053774b9/script.js — 200 — 1.5 KiB — 37 ms — h2https://vkcsystems.com/ed4035a4053774b9/view/ed4035a4053774b9/view https://vkcsystems.com/ed4035a4053774b9/view — 200 — 191 B — 55 ms — h2https://vkcsystems.com/favicon.ico/favicon.ico https://vkcsystems.com/favicon.ico — 200 — 1.3 KiB — 39 ms — h2https://vkcsystems.com/favicon.svg/favicon.svg https://vkcsystems.com/favicon.svg — 200 — 1.2 KiB — 183 ms — h2https://vkcsystems.com/_astro/networking-icon.Bxk7_kum_Z2jQ6Dw.webp/_astro/networking-icon.Bxk7_kum_Z2... https://vkcsystems.com/_astro/networking-icon.Bxk7_kum_Z2jQ6Dw.webp — 200 — 1.2 KiB — 184 ms — h2https://vkcsystems.com/_astro/cctv-icon.-nBpLvgz_26Rut8.webp/_astro/cctv-icon.-nBpLvgz_26Rut8.w... https://vkcsystems.com/_astro/cctv-icon.-nBpLvgz_26Rut8.webp — 200 — 613 B — 234 ms — h2https://vkcsystems.com/_astro/public-address-icon.XK53REU__Z26UPEX.webp/_astro/public-address-icon.XK53REU... https://vkcsystems.com/_astro/public-address-icon.XK53REU__Z26UPEX.webp — 200 — 847 B — 156 ms — h2https://vkcsystems.com/_astro/access-control-icon.DdOnQ4e8_27nf5j.webp/_astro/access-control-icon.DdOnQ4e... https://vkcsystems.com/_astro/access-control-icon.DdOnQ4e8_27nf5j.webp — 200 — 918 B — 168 ms — h2https://vkcsystems.com/_astro/comm-cabinets-icon.BQRGd9_h_Z1NzMop.webp/_astro/comm-cabinets-icon.BQRGd9_h... https://vkcsystems.com/_astro/comm-cabinets-icon.BQRGd9_h_Z1NzMop.webp — 200 — 1.4 KiB — 296 ms — h2https://vkcsystems.com/_astro/cadd-icon.r7lQDx6s_x4WBv.webp/_astro/cadd-icon.r7lQDx6s_x4WBv.we... https://vkcsystems.com/_astro/cadd-icon.r7lQDx6s_x4WBv.webp — 200 — 818 B — 170 ms — h2https://vkcsystems.com/_astro/voip-icon.CYgijlcG_Z2kiIOE.webp/_astro/voip-icon.CYgijlcG_Z2kiIOE.... https://vkcsystems.com/_astro/voip-icon.CYgijlcG_Z2kiIOE.webp — 200 — 979 B — 210 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
63% of JavaScript execution is third-party
First-party Third-party 321ms · 0KB · $4/mo
Unattributable
Other
Costly
Execution 321ms
Transfer 0 KB
Monthly Cost $4/mo

These scripts may cost more than they're worth

  • Unattributable adds 321ms and costs ~$4/month

63% 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 321ms 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

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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