It doesn’t actually use 1mb. Only if the stack touches the pages will it ever allocate the physical memory. Most threads won’t use more than 16kB (the lower bou

It doesn’t actually use 1mb. Only if the stack touches the pages will it ever allocate the physical memory. Most threads won’t use more than 16kB (the lower bound when I last tested it on x64). Still, it’s a lot larger than green threads.