[Haskell-cafe] Analyzing slow performance of a Haskell program

[Daniel Fischer]

On Monday 08 August 2011, 18:24:45, Chris Yuen wrote:
> Where is the `unsafeAt` function?

Data.Array.Base

> I can't seem to find it (
> http://haskell.org/hoogle/?hoogle=unsafeat).

Data.Array.Base is not haddocked (there's a reason for that), so hoogle 
doesn't know about its functions.

> 
> For reference I have asked the same question on StackOverflow. One
> person suggested that the reason might be that Int64 on Windows is
> broken (
> http://stackoverflow.com/questions/6970904/analyzing-slow-performance-o
> f-a-haskell-program/6976448#6976448 ).

As far as I know, there's no 64-bit GHC for windows, so that might well 
have performance impact even on 64-bit windows.