Wednesday, February 27, 2013
“Turtle races are fun indeed.”
Well, that is perhaps true given the performance of Factor, Python, and Ruby compared with implementations in C (or SBCL and LuaJIT). However, I’m happy to say that as of today, the performance of randomize (the standard library “shuffle” word) in Factor is greatly improved.
IN: scratchpad 10,000,000 <iota> >array
IN: scratchpad gc [ randomize ] time Running time: 2.78315852 seconds
IN: scratchpad gc [ randomize ] time Running time: 1.373153681 seconds
So, what changed?
Well, while investigating the overhead of Factor versus C, I fixed a few things:
- speed up random-integer
- speed up uniform-random-float (not relevant to randomize, but a nice speedup!)
- speed up randomize (similar to my version 4 of “shuffle”)
- speed up fixnum-log2
- re-enable fixnum-log2 intrinsic
Looking at other programming languages is useful to know where your performance can improve and by approximately how much. Since Factor is an attempt at making a high level language that produces relatively fast code, I hope someday to turn this “turtle” into a “hare”. Every little bit helps!