[GHC] #1473: isSpace is too slow
GHC
ghc-devs at haskell.org
Mon Oct 13 20:43:46 UTC 2014
#1473: isSpace is too slow
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Reporter: igloo | Owner: ekmett
Type: bug | Status: new
Priority: normal | Milestone: 7.10.1
Component: Core | Version: 6.6.1
Libraries | Keywords:
Resolution: | Architecture: Unknown/Multiple
Operating System: | Difficulty: Unknown
Unknown/Multiple | Blocked By:
Type of failure: | Related Tickets:
None/Unknown |
Test Case: |
Blocking: |
Differential Revisions: |
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Changes (by dfeuer):
* cc: core-libraries-committee@… (added)
* milestone: ⊥ => 7.10.1
Comment:
There are some very simple things to do about this, pending a full fix. In
particular, as Carter noted, just making sure low codepoints never call
out to C should help a lot. Using an unsigned comparison to check the
contiguous range should be good too. I think we can probably improve
things some more once we've figured out what to do about #9661.
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/1473#comment:9>
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