#5113: Huge performance regression of 7.0.2, 7.0.3 and HEAD over 7.0.1 and 6.12
(MonoLocalBinds)
--------------------------------------------+-------------------------------
Reporter: daniel.is.fischer | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.0.3
Keywords: performance, MonoLocalBinds | Testcase:
Blockedby: | Difficulty:
Os: Linux | Blocking:
Architecture: x86 | Failure: Runtime
performance bug
--------------------------------------------+-------------------------------
Comment(by simonpj):
I'm lost. The `inc` you give above is indeed polymorphic in both the monad
and the index type, and (unless specialised or inlined) will probably
perform much worse than the polymorphic vresion.
Can you give a concrete module that, when compiled, gives much worse code
with HEAD than 6.12?
Thanks
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5113#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
_______________________________________________
Glasgow-haskell-bugs mailing list
[email protected]
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
