inspect assembly/ overhead

[benmkw]

It could be interesting to use e.g. cargo asm https://github.com/gnzlbg/cargo-asm to see how much work is roughly involved when using these conversions/ how the compiler can optimise them.

I used it here as an example https://github.com/benmkw/comptime_trie (which may be a bit hacky but :D)