Message-ID: <797664590610200711w46a60957s44cd805ea7909a5b@mail.gmail.com>
Date: 2006-10-20T14:11:11Z
From: René J.V. Bertin
Subject: multithreading calling from the rpy Python package
In-Reply-To: <F722604B-31E6-43B0-B215-3E3CCB96780F@r-project.org>
Since Python has been mentioned in this context: Could not Python's
threading model and implementation serve as a guideline?
>From a few simple benchmarks I've run, it seems as if the Python
interpreter itself is thread-safe but not threadable. That is, when I
run something "pure Python" like a recursive function that returns the
nth Fibonacci number in parallel, there is no speed-up for 2 threads
on a dual-processor machine. However, calling sleep in parallel does
scale down with the number of threads, even on a single-processor ;)
Real-life code does tend to speed up somewhat, though never as much as
one would hope.
Just an idea...
Ren?