alt Hacker News> > Yes, and that's both memory and cpu usage that isn't needed No, it literally is not. The "memory" is just entries in a page table in the kernel and MMU. It shouldn't worry you at all.
Only if you never free one of those stacks. TLB flushes can be quite expensive.
Fair enough, though it's not like an async tasks runner doesn't have its own often relatively expensive book-keeping.