Re: [Haskell-cafe] poor perfomance of indexU in uvector package

alexey.skladnoy:

Hello

This post meant to be literate haskell.

I found that perfomace of indexU is very poor and it is not fast O(1) operation which is very surprising. Here is some benchmarcking I've done. Everything compiled with -O2

You're using the streamed version when its not fusing. Use the non-streaming direct implementation exported from Data.Array.Vector.UArr This is really an API bug, but I've not had time to sanitize the use.