I implemented an program in Fortran and Julia for time comparison when learning the language. This was very helpful to find problems in how I was learning julia. Maybe I did not read carefully enough, but I would compile the fortran with the intel compilers (not MKL) instead of gcc as another means for comparing speed. The intel compilers tend to make faster executables.
On Saturday, April 25, 2015 at 10:21:25 AM UTC-5, Ángel de Vicente wrote: > > Hi, > > a complete Julia newbie here... I spent a couple of days learning the > syntax and main aspects of Julia, and since I heard many good things about > it, I decided to try a little program to see how it compares against the > other ones I regularly use: Fortran and Python. > > I wrote a minimal program to solve the 3D heat equation in a cube of > 100x100x100 points in the three languages and the time it takes to run in > each one is: > > Fortran: ~7s > Python: ~33s > Julia: ~80s > > The code runs for 1000 iterations, and I'm being nice to Julia, since the > programs in Fortran and Python write 100 HDF5 files with the complete 100^3 > data (every 10 iterations). > > I attach the code (and you can also get it at: > http://pastebin.com/y5HnbWQ1) > > Am I doing something obviously wrong? Any suggestions on how to improve > its speed? > > Thanks a lot, > Ángel de Vicente > >
