Linux processes are actually surprisingly lightweight, thanks to using copy-on-write memoryu. I.e. fork is cheap, exec is expensive and changing things in alrea

Linux processes are actually surprisingly lightweight, thanks to using copy-on-write memoryu. I.e. fork is cheap, exec is expensive and changing things in already allocated memory is expensive. But this execution model does not do exec and mostly allocates new buffers for anything it needs to do. As an extra benefit, you get garbage collection as a gift from the kernel ;)