#7450: Regression in optimisation time of functions with many patterns (6.12 to
7.4)?
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Reporter: iustin | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.6.1
Resolution: | Keywords:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
Failure: Compile-time performance bug | Difficulty: Unknown
Testcase: | Blockedby:
Blocking: | Related:
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Comment(by simonpj):
OK with these changes I now get this:
|| ||6.12.3|| 6.12.3|| HEAD|| HEAD||
||#constructors|| Alloc (Mbytes)|| Time (s)|| Alloc
(Mbytes) ||Time (s)||
||40 || || || 1075|| 1.7||
||80 ||1646|| 4|| 2184 ||5||
||160|| 3217 ||8 ||4862 ||10||
||320 ||6385 ||16 ||12242 ||23||
||640|| 12766 ||34|| 35009|| 60||
So it still looks quite a bit less well-behaved than 6.12.3, for reasons I
don't yet understand. But better than before.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7450#comment:6>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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