#1984: weird performance drop with -O2 on x86
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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 |
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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.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1984#comment:4>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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