Check of ciunkos.com/ksef-invoice-validator

Nov 14, 2026, 13:44 · daily

Lighthouse 13.5 (mobile, simulated throttling), median of three runs. Scores 0–100: 90 and up green, 50–89 orange, below 50 red; a dash means the category was not measured in that check.

TBT is the lab stand-in for INP, which needs real interactions.

Performance
100good±0 vs previous±0 vs 7-day median
LCP
1.5 sgood+625 ms vs previous+625 ms vs 7-day median
CLS
0good±0 vs previous±0 vs 7-day median
TBT
0 msgood±0 vs previous±0 vs 7-day median
FCP
1.5 sgood+625 ms vs previous+625 ms vs 7-day median
TTFB
16 msgood−40 ms vs previous−19 ms vs 7-day median

Slower than before: LCP

First screen: https://ciunkos.com/ksef-invoice-validator
First screen
LCP element
main > section.hero > div.wrap > p.lead Your own system, OMS or SaaS now has to send invoices to KSeF. Drop an FA(3) XM…
Page weight
32 KB
Long tasks
1
Conditions
Lighthouse 13.5.0, mobile (Moto G Power emulation, 412×823), simulated throttling (150 ms RTT, 1.6 Mbps, CPU 4×), median of 3 runs, benchmarkIndex 2159

Loads

LoadPerfLCPFCPTBTCLSTTFB
1991.6 s1.6 s0 ms039 ms
21001.5 s1.5 s0 ms016 ms
31001.5 s1.5 s0 ms016 ms

What failed

Lower than in the previous check: Best Practices

Performance 100

Accessibility 100

Nothing failed in this category.

Best Practices 92

SEO 100

Nothing failed in this category.

Google PageSpeed Insights: Comparison details

Vitals Desk is the primary measurement. Google adds one mobile lab run from its servers. This comparison does not change our scores, history or slowdown emails.

The measured values have no substantial differences.

The Lighthouse versions differ; scores and checks may not be directly comparable.

Different locations, hardware, Lighthouse versions and a single run versus our three-run median can produce different results. These are comparison notes, not regression alerts.

Google PageSpeed Insights
MetricVitals DeskGoogleGoogle minus Vitals Desk
Performance10099−1
Accessibility100100±0
Best Practices9292±0
SEO100100±0
LCP1.5 s1.5 s−14 ms
CLS00±0
TBT0 ms65 ms+65 ms
FCP1.5 s1.5 s−14 ms
TTFB16 ms1 ms−15 ms
Lighthouse version
13.6.0
Google checked at
Nov 14, 2026, 13:44
Google’s final URL
https://ciunkos.com/ksef-invoice-validator

Additional failed checks in Google’s sample

These appear in Google’s saved sample but not in our saved list. Each source keeps a limited list.

  • Legacy JavaScript legacy-javascript-insight (Performance)
  • Reduce unused JavaScript unused-javascript (Performance)

Open PageSpeed Insights