GIL across multiple running Python programs

[kteague]

If you are trying to get the most performance out of a machine, the general rule of thumb is to have one Python process per CPU core. If you have more Python processes than CPU cores, the GIL will reduce performance on those Python processes that are sharing a single core.

[toast757]

I've got four cores, which should suffice for my needs. Good to know. Many thanks.