I really wonder why my Python implementation
is a factor 40 slower than my JavaScript implementation.
Structurally its the same code.
You can check yourself:
Python Version:
https://github.com/jburse/dogelog-moon/blob/main/devel/runtimepy/machine.py
JavaScript Version:
https://github.com/jburse/dogelog-moon/blob/main/devel/runtime/machine.js
Its the same while, if-then-else, etc.. its the same
classes Variable, Compound etc.. Maybe I could speed
it up by some details. For example to create an array
of length n, I use in Python:
temp = [NotImplemented] * code[pos]
pos += 1
Whereas in JavaScript I use, also
in exec_build2():
temp = new Array(code[pos++]);
So I hear Guido doesn't like ++. So in Python I use +=
and a separate statement as a workaround. But otherwise,
what about the creation of an array,
is the the idiom [_] * _ slow? I am assuming its
compiled away. Or does it really first create an
array of size 1 and then enlarge it?
Julio Di Egidio wrote:
On Wednesday, 15 September 2021 at 15:37:19 UTC+2, Mostowski Collapse wrote:
Opinion: Anyone who is counting on Python
for truly fast compute speed is probably using
Python for the wrong purpose.
You just don't know anything about this environment: those who need fast
computation rather use *libraries* where all the performance critical parts are
written in native code... and that's pretty customary in Python.
By that I don't mean Python is flawless, indeed (IMO) it isn't in so many ways:
to the point that, for more professional solutions in the maths/statistics
realms in particular, people rather use R: yet, the primary reason is not so
much performance but really the solidity/structure of the language per se...
Julio
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