[mercury-users] Bug in lexer.m

Nicholas Nethercote njn at csse.unimelb.edu.au
Thu Jul 17 19:19:11 AEST 2008

On Thu, 17 Jul 2008, Julien Fischer wrote:

>>> I just made a change like this to the Zinc lexer, which is structured 
>>> similarly, and got a nice speedup (I think it was about 20--30%, 
>>> although I didn't measure it all that carefully).
>> Isn't there a complier optimization or two that are supposed to help
>> here?  By packing and unpacking tuples?
> There is, but it is not enabled by default, it doesn't really work
> across module boundaries and it requires feedback to work out where
> to do the tupling.

I think I was compiling at a low optimisation setting, but it sounds like a 
higher one wouldn't have helped much anyway.

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