How to reduce CPU usage?
There is a peak every minute: https://imgur.com/4FfghLl .
I change the Rescan Interval into 300, but how to reduce CPU usage in general?
As of 0.14.40 the last part about filesystem notifications is slightly out of date. If you don’t use any of the wrappers, try enabling the advanced folder option “fs notifications” to reduce the scheduled scanning.
Where can I find the options concerning the “fs notifications”?
Actions -> Advanced -> the folder -> FS Watcher Enabled
Could you please estimate the benefits / CPU usage reduction in %?
No, sorry, it depends. Try it.