[Haskell-cafe] Re: Differences in optimisiation with interactive and compiled mo

From: Daniel Fischer To: "Branimir Maksimovic" CC: Haskell-Cafe@haskell.org Subject: Re: Differences in optimisiation with interactive and compiled mo Date: Sat, 10 Dec 2005 15:11:31 +0100

Am Donnerstag, 8. Dezember 2005 19:17 schrieb Branimir Maksimovic:

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From: Henning Thielemann

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To: Branimir Maksimovic CC: haskell-cafe@haskell.org Subject: Re: [Haskell-cafe] Differences in optimisiation with interactive and compiled mode Date: Thu, 8 Dec 2005 18:38:45 +0100 (MET)

On Thu, 8 Dec 2005, Branimir Maksimovic wrote:

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program performs search replace on a String

http://www.haskell.org/pipermail/haskell-cafe/2005-April/009692.html

This is nice and ellegant but example search replace program runs more then 50% faster with my implementation.

Greetings, Bane.

That's probably because Lemmih's is polymorphic. Yesterday evening, I cooked up my own version

Then Lemmih's is a bit faster than mine (a bit slower, if compiled for profiling) which is still a bit faster than yours (and, profiling, yours is significantly slower than the others.

I've fixed function signatures for strings only. this is my test: $ ghc -fglasgow-exts -O2 srchrep.hs --make -o srchrep.exe Chasing modules from: srchrep.hs Compiling Main ( srchrep.hs, srchrep.o ) Linking ... bmaxa@MAXA ~/tutorial $ ghc -fglasgow-exts -O2 replace.hs --make -o replace.exe Chasing modules from: replace.hs Compiling Main ( replace.hs, replace.o ) Linking ... bmaxa@MAXA ~/tutorial $ ghc -fglasgow-exts -O2 searchr.hs --make -o searchr.exe Chasing modules from: searchr.hs Compiling Main ( searchr.hs, searchr.o ) Linking ... bmaxa@MAXA ~/tutorial $ time ./searchr. searchr.exe searchr.hi searchr.hs searchr.o bmaxa@MAXA ~/tutorial $ time ./searchr.exe Working:seaseasearch replace able seaseaseasearch baker seaseasearch charlie True Done real 0m12.547s user 0m0.015s sys 0m0.000s bmaxa@MAXA ~/tutorial $ time ./replace.exe Working:seaseasearch replace able seaseaseasearch baker seaseasearch charlie True Done real 0m21.078s user 0m0.015s sys 0m0.015s bmaxa@MAXA ~/tutorial $ time ./srchrep.exe Working:seaseasearch replace able seaseaseasearch baker seaseasearch charlie True Done real 0m12.188s user 0m0.015s sys 0m0.000s Your version seems fastest. Greetings, Bane. _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/