#5367: Program in (-N1) runs 10 times slower than it with two threads (-N2)
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Reporter: wuxb | Owner: simonmar
Type: bug | Status: new
Priority: high | Milestone: 7.4.1
Component: Runtime System | Version: 7.0.4
Keywords: thread ffi | Testcase:
Blockedby: | Difficulty:
Os: Linux | Blocking:
Architecture: x86_64 (amd64) | Failure: Runtime performance bug
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Comment(by daniel.is.fischer):
I can reproduce the behaviour with 7.0.4 and 6.12.3. However, occasionally
-N2 is as slow as -N1.
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5367#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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