Long story short, heap allocation is painfully slow. Any sort of malloc will always be slower than a custom pool or a bump allocator, because it has a lot more

Long story short, heap allocation is painfully slow. Any sort of malloc will always be slower than a custom pool or a bump allocator, because it has a lot more context to deal with. Rust makes it especially hard to use custom allocators, see bumpalo for example [0]. To be fair, progress is being made in this area [1]. Theoretically one can use a "handle table" as a replacement for pools, you can find relevant discussion at [2]. [0] https://github.com/fitzgen/bumpalo https://github.com/fitzgen/bumpalo [1] https://github.com/rust-lang/rust/issues/32838 https://github.com/rust-lang/rust/issues/32838 [2] https://news.ycombinator.com/item?id=36353145 https://news.ycombinator.com/item?id=36353145 Edit: formatting.