There are times when it makes sense to use more threads than CPU's though; one good (and common) example is web application servers. Applications that use resou

There are times when it makes sense to use more threads than CPU's though; one good (and common) example is web application servers. Applications that use resources like databases that are I/O rather than compute bound can be significantly more efficient with additional threads beyond the number of CPU's available. Of course there's a limit; overkill doesn't do anyone any good.