... to speed up processing if you have multiple CPU cores, use par=2 or par=3 to enable parallel validation threads, if your client permits it.
I don't think it's necessary to fiddle with this option. The default is
par=0 which means Bitcoin Core allocates automatically the number of threads/cores it needs. Depending on what other tasks your node device might have, a negative value for
par tells Core to leave that number of cores free for other processes than Core's.
Exactly you’re right Bitcoin Core can automatically determine and distribute the optimal number of CPU threads based on the system's available cores when par=0 is set by default setting a negative value, such as par=-1, instructs Core to (use all cores except one leave one free for other system tasks) This is more intelligent since it maintains the device's responsiveness, particularly if it is executing the node while performing other tasks in summary you're right unless you have a very specific performance tuning goal, it's usually not necessary to manually set par=N for the majority of users, the automatic behaviour (default par=0) is sufficiently optimised
In summary you're right unless you have a very specific performance tuning goal it's usually not necessary to manually set par=N for the majority of users the automatic behaviour (default par=0) is sufficiently optimised