Openhabian 3.1.0 100% CPU

Suddenly openhab becomes very slow and the CPU is at 100%
On the Raspberry Pi nothing is installed except the speedtest cli
And ZRAM is disabled
What could be the problem?

my system:
openHABian v1.6.5 3.1.0-SNAPSHOT

   Release = Raspbian GNU/Linux 10 (buster)
##    Kernel = Linux 5.10.17-v7l+
##  Platform = Raspberry Pi 4 Model B Rev 1.2
##    Uptime = 5 day(s). 23:46:6
## CPU Usage = 27.46% avg over 4 cpu(s) (4 core(s) x 1 socket(s))
##  CPU Load = 1m: 1.28, 5m: 1.44, 15m: 1.27
##    Memory = Free: 1.16GB (31%), Used: 2.62GB (69%), Total: 3.78GB
##      Swap = Free: 1.99GB (100%), Used: 0.00GB (0%), Total: 1.99GB
##      Root = Free: 46.66GB (83%), Used: 9.19GB (17%), Total: 58.27GB
##   Updates = 14 apt updates available.
##  Sessions = 1 session(s)
## Processes = 130 running processes of 32768 maximum processes

That you manually edit files ?

I’m not sure I understand what you mean

That you may be editing text input files such as *.items and *.rules.
This often results in major reprocessing efforts every time you save a change.

All rules are written in files
And items I wrote through the Textual Definition UI
But CPU has been on 100% for three days

You should have mentioned at least that in the first place.
So do your homework first please and analyze your problem before you ask for help.