On Mon, Jul 26, 2010 at 5:03 PM, Carl Witty carl.wi...@gmail.com wrote:
I think I've tracked down the underlying problem; it's a subtle Cython
performance bug.
In VERY limited testing, the following procedure fixes the __getattr__
-related performance issues that I've noticed. Nicolas and
On Tue, Jul 27, 2010 at 11:20 AM, Nicolas M. Thiery
nicolas.thi...@u-psud.fr wrote:
On Tue, Jul 27, 2010 at 02:05:21AM -0700, Robert Bradshaw wrote:
Option 4 is to fix this defect in Cython. I played around with this
the other night and the problem is this: the Python C API has only one
On Fri, Jul 23, 2010 at 01:05:00PM -0700, William Stein wrote:
During the last few weeks I've spent time optimizing code, among
other things.
Great!
A surprising number of random things I look at in Sage are too slow
by a factor of 10-100, usually due to programming style. One way to
help
On Mon, Jul 26, 2010 at 11:31 AM, Nicolas M. Thiery
nicolas.thi...@u-psud.fr wrote:
On Fri, Jul 23, 2010 at 01:05:00PM -0700, William Stein wrote:
During the last few weeks I've spent time optimizing code, among
other things.
Great!
A surprising number of random things I look at in Sage are
On Mon, Jul 26, 2010 at 11:53 AM, William Stein wst...@gmail.com wrote:
Ironically, extension types are far less affected, if at all:
Without:
sage: timeit('ZZ._list',number=10^6)
sage: timeit('ZZ.gens',number=10^6)
sage: timeit('ZZ.an_element',number=10^6)
100 loops, best
William,
grumpy o' pa
There is a strong technical issue that needs to be resolved, and for
which I explicitly take the blame. And I understand your frustration
when fighting with zillions of technical points. However I perceived
your e-mail as unfairly bashing the sage-combinat
On Mon, Jul 26, 2010 at 3:36 PM, Nicolas M. Thiery
nicolas.thi...@u-psud.fr wrote:
William,
grumpy o' pa
There is a strong technical issue that needs to be resolved, and for
which I explicitly take the blame. And I understand your frustration
when fighting with zillions of
On Mon, Jul 26, 2010 at 3:36 PM, Nicolas M. Thiery
nicolas.thi...@u-psud.fr wrote:
I just had a look at the Python sources (in Object/typeobject.c), and
it's all about the difference between slot_tp_getattro and
slot_tp_getattr_hook, the later being a bit more complicated than the
former. I
On Fri, Jul 23, 2010 at 1:05 PM, William Stein wst...@gmail.com wrote:
The categories implementation as it is in Sage must be changed or
removed. There, I got your attention.
A few months ago some code was added to Sage by the combinat folks
called categories. I recently learned ObjectiveC,
On Fri, Jul 23, 2010 at 10:05 PM, William Stein wst...@gmail.com wrote:
Anyway, a slowdown of more than 1 microsecond on everything throughout
sage is absolutely unacceptable.
+1
--
Robert L. Miller
http://www.rlmiller.org/
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Hi,
During the last few weeks I've spent time optimizing code, among other
things. A surprising number of random things I look at in Sage are
too slow by a factor of 10-100,
usually due to programming style.One way to help to remedy that
would be to write a book or article about how to
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