On 19 Aug, 05:34, Hendrik van Rooyen <hend... at microcorp.co.za> wrote: > The GIL does apply - I was talking nonsense again. Misread the OP's > intention. It depends on what the OP's functions "doStuff1" and "doStuff2" actually do. If they release the GIL (e.g. make I/O calls) it does not apply. The GIL only serialize access to the interpreter.