#6110: Data.Vector.Unboxed performance regression of 7.4.1 relative to 7.0.4
----------------------------------------------+-----------------------------
Reporter: mdgabriel | Owner: pcapriotti
Type: bug | Status: infoneeded
Priority: high | Milestone: 7.4.3
Component: Compiler | Version: 7.4.1
Keywords: Vector Performance Regression | Os: Linux
Architecture: x86 | Failure: Runtime
performance bug
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: #6111 |
----------------------------------------------+-----------------------------
Comment(by igloo):
For me, 7.4.1 is twice as fast as 7.0.2 with an argument of 10000000000.
{{{
$ ~/bindists/7.0.2/inst/bin/ghc -O2 -Wall --make -o sum Main.hs
$ time ./sum 10000000000
Sum=4.999999999006786e19
./sum 10000000000 34.77s user 0.00s system 100% cpu 34.771 total
$ ~/bindists/7.4.1/inst/bin/ghc -O2 -Wall --make -o sum Main.hs
$ time ./sum 10000000000
Sum=4.999999999006786e19
./sum 10000000000 17.39s user 0.00s system 100% cpu 17.389 total
}}}
Both have vector 0.9.1.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6110#comment:11>
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
