#4951: Performance regression 7.0.1 -> 7.0.1.20110201
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Reporter: simonmar | Owner: simonpj
Type: bug | Status: new
Priority: highest | Milestone: 7.0.2
Component: Compiler | Version: 7.0.1
Resolution: | Keywords:
Testcase: | Blockedby:
Difficulty: | Os: Unknown/Multiple
Blocking: | Architecture: Unknown/Multiple
Failure: Runtime performance bug |
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Comment(by simonmar):
And for your enjoyment, here's 7.0.1 vs. today's HEAD (20110210), with a
few of the bad ones singled out:
{{{
--------------------------------------------------------------------------------
Program Size Allocs Runtime Elapsed
--------------------------------------------------------------------------------
power +4.6% +112.1% +67.6% +67.8%
exp3_8 +2.6% +53.7% +40.9% +40.9%
primes +2.6% +64.6% 0.11 0.11
--------------------------------------------------------------------------------
Min -4.4% -95.0% -27.7% -27.7%
Max +6.8% +112.1% +67.6% +67.8%
Geometric Mean +2.1% -3.4% -0.7% -0.9%
}}}
on the whole the HEAD is improved over 7.0.1 (and 7.0.1 was generally
better than 6.12.3), but we ought to find out what's going on with exp3_8
and primes, both of which are in the imaginary set.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4951#comment:5>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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