Source of the spin

Dear readers,

I probably did something silly again,
Could you help with a bit of knowledge around performance ?
My openbsd CPU (6.8) is spinning a lot :

0.0%Int 53.1%Spn 25.8%Sys 19.6%Usr 1.4%Idle

* Is this bad ?
* What kind of basic operation ( like basic shell scripting ) could do that ? ?

Thank you,

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