[racket-dev] Optional equality predicate for assoc and member

From: Matthew Flatt (mflatt at cs.utah.edu)
Date: Sun Apr 24 19:58:14 EDT 2011

At Sun, 24 Apr 2011 19:24:18 -0400, Neil Van Dyke wrote:
> The modest performance hit for "assq" on 32-bit (my 
> workstation) right now is a small price to pay for doubling the speed on 
> 64-bit (lots of servers).

I forgot to reply to that point before. Unfortunately, I don't think
you're going to see the same effect on other machines. It seems to be
something about my Mac laptop and/or the compiler. Two other 64-bit
machines that I tried (Linux/gcc and Windows/MSVC) behaved more like my
laptop in 32-bit mode.

Posted on the dev mailing list.