cvs commit: fptools/ghc/rts Schedule.c

[Simon Marlow]

simonmar    2002/12/13 07:16:33 PST

  Modified files:
    ghc/rts              Schedule.c 
  Log:
  Shortcut when switching evaluators: instead of going round the normal
  scheduler loop, just cut to the chase and run the thread using the
  other evaluator.
  
  This avoids doing stack squeezing each time we switch evaluators,
  which is an O(n) operation these days, whereas it used to be O(n) the
  first time, and O(1) thereafter if the stack hadn't changed too much.
  This is a problem that we should perhaps address separately, but for
  now the workaround should provide a speed boost to GHCi on the HEAD.
  
  Revision  Changes    Path
  1.160     +16 -13    fptools/ghc/rts/Schedule.c
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