Haskell allocates 1KB (which is also much larger than the allocation required for a typical callback registration in event-based programming) initially, but gro

Haskell allocates 1KB (which is also much larger than the allocation required for a typical callback registration in event-based programming) initially, but grows the stack in chunks of 4KB. These small chunks come at a cost, too. The GHC runtime needs to copy around the edges of the stack at the chunk boundaries, and stack use becomes slightly more expensive.