[GHC] #1473: isSpace is too slow

[GHC]

#1473: isSpace is too slow
-----------------------------+----------------------------------------------
  Reporter:  igloo           |          Owner:                  
      Type:  bug             |         Status:  new             
  Priority:  normal          |      Milestone:  _|_             
 Component:  libraries/base  |        Version:  6.6.1           
Resolution:                  |       Keywords:                  
Difficulty:  Unknown         |             Os:  Unknown/Multiple
  Testcase:                  |   Architecture:  Unknown/Multiple
   Failure:  None/Unknown    |  
-----------------------------+----------------------------------------------
Changes (by guest):

  * failure:  => None/Unknown

Comment:

 Improving isSpace is going to be difficult. I've done some Criterion
 benchmarking of the suggested optimizations, and for most of them, the
 benefit is modest. This may reflect improved optimization in GHC 6.10.2.

 However, there is a small improvement in `gspace'` and `gspace'''` as
 compared to `gspace`, so that might be worth doing?

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1473#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler