[GHC] #1984: weird performance drop with -O2 on x86

[GHC]

#1984: weird performance drop with -O2 on x86
----------------------+-----------------------------------------------------
 Reporter:  guest     |          Owner:            
     Type:  bug       |         Status:  closed    
 Priority:  normal    |      Milestone:  6.8 branch
Component:  Compiler  |        Version:  6.8.2     
 Severity:  normal    |     Resolution:  duplicate 
 Keywords:            |     Difficulty:  Unknown   
 Testcase:            |   Architecture:  x86       
       Os:  Linux     |  
----------------------+-----------------------------------------------------
Changes (by simonmar):

  * status:  new => closed
  * resolution:  => duplicate

Comment:

 This is a result of #1589.  When you turn on -O, the threads are created
 faster than they can complete and be GC'd, and the GC really slows down
 when there are lots of threads in the system.  I'll be fixing this in
 6.10.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1984#comment:4>
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