#5888: Performance regression in 7.4.1 compared to 6.12.3
---------------------------------+------------------------------------------
Reporter: nickie | Owner:
Type: bug | Status: new
Priority: high | Milestone: 7.4.2
Component: Compiler | Version: 7.4.1
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: Runtime performance bug
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
---------------------------------+------------------------------------------
Comment(by simonpj):
Notes following a brief discussion with Simon M
* It is probably a Good Plan to make the simplifier monad carry the
global symbol table, just as the desugarer monad does, so that rules can
readily grab these `Id`s. That would be generally useful.
* Maybe it's worth having `Integer/Int` versions of all the `Integer`
operations. Or not. It's a big surprise to me that the cost of unboxing
that `S#` is 20% of execution time; and also allocation is higher and I
don't understand why.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5888#comment:4>
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
