CPU usage at cca. 10 %

[SlimDeluxe]

Hi everyone,
I wonder what's your CPU for the Solo PHP process? Mine is at 10 %, which I think should not be, considering it's a terminal app. It also takes about 5-10 seconds to start.
If I enable only 1 lazy command, it's around 6-7 %. Start time is about the same.
CPU: 8 × 11th Gen Intel® Core™ i7-1165G7 @ 2.80GHz

Running this on a Debian image in Docker. I updated screen to v5.
If I try running it natively (on the host, Fedora 41), it's a bit better (cca. 5 %). But I still find it strange, compared to 4 PhpStorm windows/projects open at the same time, which uses below 1% in idle.

Regards