For scalar code that's fair, but keep in mind that with `gather`, you can vectorize it, and there you do worry about integer width as more width means fewer lan

For scalar code that's fair, but keep in mind that with `gather`, you can vectorize it, and there you do worry about integer width as more width means fewer lanes. Though tbf you probably should use B+ Tree structures chunked to your bulk/cache fetch "line/page" size, and vectorized higher-than-radix-2 search within each node.