[Theory] How to speed up python code execution / pypy vs GPU

[Steve D'Aprano]

On Sun, 6 Nov 2016 09:17 am, Mr. Wrobel wrote:

> However the most important is second part of my question.
> 
> What do you think about using GPU processing or pypy?

I don't have any experience with GPU processing. I expect that it will be
useful for somethings, but for number-crushing and numeric work, I am
concerned that GPUs rarely provide correctly rounded IEEE-754 maths. That
means that they are accurate enough for games where a few visual glitches
don't matter, but they risk being inaccurate for serious work.

I fear that doing numeric work in GPUs will be returning to the 1970s, when
every computer was incompatible with every other computer, and it was
almost impossible to write cross-platform, correct, accurate numeric code.

As far as PyPy goes, it is a proven optimizing Python JIT compiler that can
speed-up long-running code very well. It is not suitable for short scripts
or programmers that run quickly. It takes time for the JIT to warm up and
start showing optimizations.




-- 
Steve
“Cheer up,” they said, “things could be worse.” So I cheered up, and sure
enough, things got worse.