On 2009-02-20 13:20, Unknown wrote:
On 2009-02-20, Aahz<a...@pythoncraft.com> wrote:
Steven D'Aprano<ste...@remove.this.cybersource.com.au> wrote:
As I understand it, there's very little benefit to multi-cores
in Python due to the GIL.
As phrased, your statement is completely wrong. Here's a more
correct phrasing: "For threaded compute-bound applications
written in pure Python, there's very little benefit to
multiple cores." But threaded I/O-bound applications do
receive some benefit from multiple cores, and using multiple
processes certainly leverages multiple cores. If boosting the
performance of a threaded compute-bound application is
important, one can always write the critical parts in C/C++.
Do the crunchy bits of scipy/numpy, scientific python, vtk and
other compute-intensive libraries tend to release the GIL while
they're busy "computing"?
Often. Not as often as they could, sometimes.
--
Robert Kern
"I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth."
-- Umberto Eco
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