#5536: IO performance regression in 7.2 vs 7.0
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Reporter: simonmar | Owner: batterseapower
Type: bug | Status: new
Priority: high | Milestone: 7.4.1
Component: libraries/base | Version: 7.2.1
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Comment(by simonmar):
I managed to fail to commit that change somehow, sorry about that. FWIW
it was just a seq in the unpack loop, no INLINEs. Your version has
improved performance a little for me, the perf drop is now 17% on both
text/binary versions. (64-bit Linux)
So maybe we just have to eat this. It seems like a high price to pay for
something that is almost never needed, though.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5536#comment:7>
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