Thanks Cristian. Man a full day away from my email and good things happen. I should do this more often.
On Feb 28, 2014, at 2:48 PM, Neil Toronto wrote: > Well done. I would never have thought of compiling with CGC. > > Neil ⊥ > > On 02/28/2014 11:46 AM, Matthew Flatt wrote: >> Cristian determined that Racket really was was much slower for the >> program on Windows than on other platforms, and he also noticed that >> RacketCGC was significantly faster. >> >> That information pointed me to a simple inefficiency in the way Racket >> allocated for GMP with the default collector. I've pushed a repair, and >> Matthias's version of the program (which is a little faster than the >> original) now runs about 4 times as fast on my machine (similar to the >> Java version). >> >> Fixing the bug was easy. The hard work was recognizing that something >> was wrong and in what circumstances --- so thanks to everyone for that, >> especially Cristian. >> >> At Thu, 27 Feb 2014 19:10:06 -0500, Eric Dong wrote: >>> On my computer the Java program takes 7 seconds. So you should be seeing a >>> 3x slowdown with Racket. >>> >>> You seem to see a 20x slowdown. This is very strange. How much RAM do you >>> have? Racket performs very poorly when its memory is swapped out to disk. >>> >>> To the rest of the list: is there any inefficiency with Racket on Windows >>> that could cause this massive slowdown? >>> >>> >>> On Thu, Feb 27, 2014 at 6:34 PM, Cristian Baboi >>> <cristian.ba...@gmail.com>wrote: >>> >>>> >>>> >>>> On 28 februarie 2014 01:13:46 EET, Eric Dong <yd2d...@uwaterloo.ca> wrote: >>>> >>>>> Windows shouldn't be much slower though. What CPU model do you have? >>>>> (2.0 >>>>> GHz can be fast or slow depending on your CPU model) >>>>> >>>> >>>> AMD Athlon 3800+ X2 >>>> >>>> >>>> Also, can you post a Python program that runs much faster? Maybe it is >>>>> only >>>>> your computer which is slow, and it would be even slower running the >>>>> Python >>>>> >>>> >>>> I attached a Java program I tested and it ran much faster. 13 s. >>>> >>>> I cannot test python because I don't have it installed and require some >>> libraries for big number arithmetic. I don't know python. >>>> >>>> >>> ____________________ >>> Racket Users list: >>> http://lists.racket-lang.org/users >> ____________________ >> Racket Users list: >> http://lists.racket-lang.org/users >> > > ____________________ > Racket Users list: > http://lists.racket-lang.org/users ____________________ Racket Users list: http://lists.racket-lang.org/users
