#1473: isSpace is too slow -------------------------------------+------------------------------------- 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: | -------------------------------------+------------------------------------- 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 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler