Can you clarify what you mean by "going down a lot"? I interpret that to mean that the stacks are flatter, but then debug builds without inlining would grow the

Can you clarify what you mean by "going down a lot"? I interpret that to mean that the stacks are flatter, but then debug builds without inlining would grow the stack, not flatten it, so I'm not clear on what you're saying. Scheduling tasks on a work-stealing queue tends to flatten the stack first, eg. a halted task has a nearly empty stack if it's an async coroutine. The scheduler itself may have 3-4 calls deep before resuming the task itself, so that doesn't seem too bad. Unless you're talking about full blown threads.