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https://companies.si

Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
92
GRADE
A
FIX
2
REVIEW
4
PASS
17
INFO
3

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

55
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.
92
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.

4.09 s

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

9.41 s

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

361 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.

5.10 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.

9.41 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
26
17 PASS 4 REVIEW 2 FIX
D
JS Execution Cost
Action
2071ms total JS execution
FIX
2071ms total JS execution
Warning::
https://companies.si/_app/immutable/chunks/eHNFRpx...: 932ms CPU time
Warning::
Unattributable: 511ms CPU time
Warning::
https://companies.si/: 464ms CPU time
Info::
https://companies.si/_app/immutable/chunks/BTavBtk...: 98ms CPU time
Info::
https://static.cloudflareinsights.com/beacon.min.j...: 67ms CPU time
Info::
Third-party scripts: 67ms (3% of total)

Main Thread Breakdown

Script Evaluation 48% Other 26% Style & Layout 10% Script Parsing & Compilation 7% Parse HTML & CSS 4% Garbage Collection 4%
ScriptTotalScriptingParse/CompileParty
https://companies.si/_app/immutable/chunks/eHNFRpxQ.js932ms753ms1ms1st
Unattributable511ms111ms0ms1st
https://companies.si/464ms14ms155ms1st
https://companies.si/_app/immutable/chunks/BTavBtkx.js98ms94ms1ms1st
https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e178179150949667ms49ms0ms3rd
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Page Weight Budget
1.3 MB transferred, 37 requests
REVIEW
1.3 MB transferred, 37 requests
Info::
Page weighs 2.0 MB (1.3 MB transferred)
Info::
37 HTTP requests
Info::
Estimated 0.27 g CO2 per page load
1.3 MB / 2.4 MB budget
1.3 MB transferred
37 requests
0.27 g CO2 per page load
Images 878.1 KiB 67%
HTML 195.9 KiB 15%
JavaScript 118.9 KiB 9%
Other 51.1 KiB 4%
Fonts 47.3 KiB 4%
CSS 18.7 KiB 1%
Other 460 B 0%
0 2.4 MB 4.9 MB
Under budget
B
Image Optimization
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Warning::
https://companies.si/_app/immutable/assets/logo-tr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
13 images 878 KB
0 oversized -0 KB
13 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

B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
B
Page Weight Inventory
37 resources · 1.3 MB · 27 KB savings available
REVIEW
37 resources · 1.3 MB · 27 KB savings available
Warning::
Page weight 1.3 MB exceeds 1 MB target by 287 KB
Got: 1.3 MB Expected: ≤ 1 MB
Info::
15 third-party resources (17% of weight)
Info::
1 resources over 200KB
37 resources · 1.3 MiB · 15 third-party 286.5 KiB over 1MB target
Image 71% · 929.2 KiB
Document 15% · 195.9 KiB
JavaScript 9% · 118.9 KiB
Font 4% · 47.3 KiB
CSS 1% · 18.7 KiB
Other 0% · 460 B

~27.0 KiB of savings available

Remove unused JavaScript: 27.0 KiB
A+
Third-Party Impact
17% third-party, 0 ms blocking
PASS
17% third-party, 0 ms blocking
Info::
Third-party code accounts for 17% of page weight (219.5 KiB of 1.3 MiB)
Info::
Third-party blocking time is low (0 ms)
83%
17%
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
1 fonts (47 KB)
PASS
1 fonts (47 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

47 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 7.0 s 8.0 s 9.0 s FCP 4.1 s LCP 9.4 shttps://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2UcC73FwrK3iLTeHuS_nVMrM... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 47.3 KiB — 7 ms — font-display: swap
UcC73FwrK3iLTeHuS_nVMrM... woff2 swap
Size 47 KB
Load time 7 ms
Start 1.3 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+
JS Bundles
17 scripts, 27 KB unused
PASS
17 scripts, 27 KB unused
Warning::
https://companies.si/_app/immutable/chunks/eHNFRpx...: 27 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 27 KB
27 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://companies.si/_app/immutable/chunks/eHNFRpxQ.js45 KB27 KB (60%)1st
https://companies.si/_app/immutable/chunks/X5C--DI7.js1 KB1st
https://companies.si/_app/immutable/chunks/DiKSXGcS.js1 KB1st
https://companies.si/_app/immutable/entry/app.GHlQvnBf.js2 KB1st
https://companies.si/_app/immutable/chunks/kNaey6uv.js1 KB1st
https://companies.si/_app/immutable/chunks/xihTtKlq.js1 KB1st
https://companies.si/_app/immutable/nodes/0.DhANugUN.js5 KB1st
https://companies.si/_app/immutable/chunks/BTavBtkx.js20 KB1st
https://companies.si/_app/immutable/chunks/Zjg9KXtG.js1 KB1st
https://companies.si/_app/immutable/chunks/BqTYwzEh.js1 KB1st

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

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+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+
Compression Algorithm
Main response uses brotli
PASS
Main response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
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+
Server-Timing Observability
3 Server-Timing entries advertised
PASS
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
A
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Warning::
Compressed response missing `Vary` header
The page is served with `Content-Encoding: br` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.
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
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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
37 requests over 2066ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 4.1 s LCP 9.4 shttps://companies.si// https://companies.si/ — 200 — 195.9 KiB — 1.1 s — h3https://companies.si/_app/immutable/assets/0.2LKhuG_L.css/_app/immutable/assets/0.2LKhuG_L.c... https://companies.si/_app/immutable/assets/0.2LKhuG_L.css — 200 — 16.1 KiB — 175 ms — h3https://companies.si/_app/immutable/assets/3.DmbUNS4e.css/_app/immutable/assets/3.DmbUNS4e.c... https://companies.si/_app/immutable/assets/3.DmbUNS4e.css — 200 — 1.3 KiB — 167 ms — h3https://companies.si/_app/immutable/entry/start.BY_auMZE.js/_app/immutable/entry/start.BY_auMZ... https://companies.si/_app/immutable/entry/start.BY_auMZE.js — 200 — 599 B — 169 ms — h3https://companies.si/_app/immutable/chunks/QBEH1LiE.js/_app/immutable/chunks/QBEH1LiE.js https://companies.si/_app/immutable/chunks/QBEH1LiE.js — 200 — 13.4 KiB — 195 ms — h3https://companies.si/_app/immutable/chunks/BTavBtkx.js/_app/immutable/chunks/BTavBtkx.js https://companies.si/_app/immutable/chunks/BTavBtkx.js — 200 — 20.1 KiB — 195 ms — h3https://companies.si/_app/immutable/entry/app.GHlQvnBf.js/_app/immutable/entry/app.GHlQvnBf.... https://companies.si/_app/immutable/entry/app.GHlQvnBf.js — 200 — 2.5 KiB — 189 ms — h3https://companies.si/_app/immutable/chunks/kNaey6uv.js/_app/immutable/chunks/kNaey6uv.js https://companies.si/_app/immutable/chunks/kNaey6uv.js — 200 — 1.2 KiB — 196 ms — h3https://companies.si/_app/immutable/chunks/xihTtKlq.js/_app/immutable/chunks/xihTtKlq.js https://companies.si/_app/immutable/chunks/xihTtKlq.js — 200 — 590 B — 36 ms — h3https://companies.si/_app/immutable/nodes/0.DhANugUN.js/_app/immutable/nodes/0.DhANugUN.js https://companies.si/_app/immutable/nodes/0.DhANugUN.js — 200 — 5.0 KiB — 40 ms — h3https://companies.si/_app/immutable/chunks/Zjg9KXtG.js/_app/immutable/chunks/Zjg9KXtG.js https://companies.si/_app/immutable/chunks/Zjg9KXtG.js — 200 — 524 B — 190 ms — h3https://companies.si/_app/immutable/chunks/X5C--DI7.js/_app/immutable/chunks/X5C--DI7.js https://companies.si/_app/immutable/chunks/X5C--DI7.js — 200 — 673 B — 177 ms — h3https://companies.si/_app/immutable/chunks/BqTYwzEh.js/_app/immutable/chunks/BqTYwzEh.js https://companies.si/_app/immutable/chunks/BqTYwzEh.js — 200 — 604 B — 185 ms — h3https://companies.si/_app/immutable/chunks/DiKSXGcS.js/_app/immutable/chunks/DiKSXGcS.js https://companies.si/_app/immutable/chunks/DiKSXGcS.js — 200 — 1.4 KiB — 192 ms — h3https://companies.si/_app/immutable/chunks/BEiubOk2.js/_app/immutable/chunks/BEiubOk2.js https://companies.si/_app/immutable/chunks/BEiubOk2.js — 200 — 944 B — 169 ms — h3https://companies.si/_app/immutable/nodes/3.Brbck_09.js/_app/immutable/nodes/3.Brbck_09.js https://companies.si/_app/immutable/nodes/3.Brbck_09.js — 200 — 3.5 KiB — 38 ms — h3https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Manrope:wght@600;700&display=swapfonts.googleapis.com/css2?family=In... https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Manrope:wght@600;700&display=swap — 200 — 1.3 KiB — 142 ms — h2https://companies.si/_app/immutable/assets/logo-transparent.BA-rTNBD.png/_app/immutable/assets/logo-transpa... https://companies.si/_app/immutable/assets/logo-transparent.BA-rTNBD.png — 200 — 718.5 KiB — 64 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496 — 200 — 11.3 KiB — 30 ms — h2https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2fonts.gstatic.com/s/inter/v20/UcC73... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 200 — 47.3 KiB — 7 ms — h3https://companies.si/_app/immutable/nodes/1.BpV55H29.js/_app/immutable/nodes/1.BpV55H29.js https://companies.si/_app/immutable/nodes/1.BpV55H29.js — 200 — 1.4 KiB — 166 ms — h3https://companies.si/cdn-cgi/rum?/cdn-cgi/rum? 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0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 4.1 s LCP 9.4 shttps://companies.si// https://companies.si/ — 200 — 195.9 KiB — 1.1 s — h3https://companies.si/_app/immutable/assets/0.2LKhuG_L.css/_app/immutable/assets/0.2LKhuG_L.c... https://companies.si/_app/immutable/assets/0.2LKhuG_L.css — 200 — 16.1 KiB — 175 ms — h3https://companies.si/_app/immutable/assets/3.DmbUNS4e.css/_app/immutable/assets/3.DmbUNS4e.c... https://companies.si/_app/immutable/assets/3.DmbUNS4e.css — 200 — 1.3 KiB — 167 ms — h3https://companies.si/_app/immutable/entry/start.BY_auMZE.js/_app/immutable/entry/start.BY_auMZ... https://companies.si/_app/immutable/entry/start.BY_auMZE.js — 200 — 599 B — 169 ms — h3https://companies.si/_app/immutable/chunks/QBEH1LiE.js/_app/immutable/chunks/QBEH1LiE.js https://companies.si/_app/immutable/chunks/QBEH1LiE.js — 200 — 13.4 KiB — 195 ms — h3https://companies.si/_app/immutable/chunks/BTavBtkx.js/_app/immutable/chunks/BTavBtkx.js https://companies.si/_app/immutable/chunks/BTavBtkx.js — 200 — 20.1 KiB — 195 ms — h3https://companies.si/_app/immutable/entry/app.GHlQvnBf.js/_app/immutable/entry/app.GHlQvnBf.... https://companies.si/_app/immutable/entry/app.GHlQvnBf.js — 200 — 2.5 KiB — 189 ms — h3https://companies.si/_app/immutable/chunks/kNaey6uv.js/_app/immutable/chunks/kNaey6uv.js https://companies.si/_app/immutable/chunks/kNaey6uv.js — 200 — 1.2 KiB — 196 ms — h3https://companies.si/_app/immutable/chunks/xihTtKlq.js/_app/immutable/chunks/xihTtKlq.js https://companies.si/_app/immutable/chunks/xihTtKlq.js — 200 — 590 B — 36 ms — h3https://companies.si/_app/immutable/nodes/0.DhANugUN.js/_app/immutable/nodes/0.DhANugUN.js https://companies.si/_app/immutable/nodes/0.DhANugUN.js — 200 — 5.0 KiB — 40 ms — h3https://companies.si/_app/immutable/chunks/Zjg9KXtG.js/_app/immutable/chunks/Zjg9KXtG.js https://companies.si/_app/immutable/chunks/Zjg9KXtG.js — 200 — 524 B — 190 ms — h3https://companies.si/_app/immutable/chunks/X5C--DI7.js/_app/immutable/chunks/X5C--DI7.js https://companies.si/_app/immutable/chunks/X5C--DI7.js — 200 — 673 B — 177 ms — h3https://companies.si/_app/immutable/chunks/BqTYwzEh.js/_app/immutable/chunks/BqTYwzEh.js https://companies.si/_app/immutable/chunks/BqTYwzEh.js — 200 — 604 B — 185 ms — h3https://companies.si/_app/immutable/chunks/DiKSXGcS.js/_app/immutable/chunks/DiKSXGcS.js https://companies.si/_app/immutable/chunks/DiKSXGcS.js — 200 — 1.4 KiB — 192 ms — h3https://companies.si/_app/immutable/chunks/BEiubOk2.js/_app/immutable/chunks/BEiubOk2.js https://companies.si/_app/immutable/chunks/BEiubOk2.js — 200 — 944 B — 169 ms — h3https://companies.si/_app/immutable/nodes/3.Brbck_09.js/_app/immutable/nodes/3.Brbck_09.js https://companies.si/_app/immutable/nodes/3.Brbck_09.js — 200 — 3.5 KiB — 38 ms — h3https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Manrope:wght@600;700&display=swapfonts.googleapis.com/css2?family=In... https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Manrope:wght@600;700&display=swap — 200 — 1.3 KiB — 142 ms — h2https://companies.si/_app/immutable/assets/logo-transparent.BA-rTNBD.png/_app/immutable/assets/logo-transpa... https://companies.si/_app/immutable/assets/logo-transparent.BA-rTNBD.png — 200 — 718.5 KiB — 64 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496 — 200 — 11.3 KiB — 30 ms — h2https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2fonts.gstatic.com/s/inter/v20/UcC73... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 200 — 47.3 KiB — 7 ms — h3https://companies.si/_app/immutable/nodes/1.BpV55H29.js/_app/immutable/nodes/1.BpV55H29.js https://companies.si/_app/immutable/nodes/1.BpV55H29.js — 200 — 1.4 KiB — 166 ms — h3https://companies.si/cdn-cgi/rum?/cdn-cgi/rum? 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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
3% of JavaScript execution is third-party
First-party Third-party 67ms · 11KB · €0/mo
static.cloudflareinsights.com
Other
Optional
Execution 67ms
Transfer 11 KB
Monthly Cost €0/mo

How third-party costs are calculated

Image Optimization
14 images, 1436 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

14

Total Size

1436 KB

14 missing dimensions 5 missing lazy loading
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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