[tw061023]

While I agree with you, my point was specifically the cost of a malloc. As someone who had actually profiled a pool vs malloc, this is kind of a salient point for me.

In some workloads short-lived allocations are common. Like memory is allocated for milliseconds and then deallocated - and X% of time will be spent just inside the allocator trying to find the best block to allocate. At this point you want to make sure that you don't spend more time in the allocator than allocations actually live.