#11900: Serious regression caused by #9138
---------------------------+------------------------------------------------
Reporter: SimonKing | Owner: tbd
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.7.3
Component: performance | Keywords: categories regression
Work_issues: | Upstream: N/A
Reviewer: | Author: Simon King
Merged: | Dependencies: #9138 #11911
---------------------------+------------------------------------------------
Comment(by SimonKing):
This ticket is related with #11935. There, the time for creation of parent
and element classes of categories over different base rings is avoided.
With the patches from here and the second of the two patches from #11935
applied to sage-4.7.2.alpha3, I find:
{{{
king@mpc622:/mnt/local/king/SAGE/rebase/sage-4.7.2.alpha3$ time ./sage
ellbsd.sage
real 0m4.873s
user 0m4.408s
sys 0m0.364s
king@mpc622:/mnt/local/king/SAGE/rebase/sage-4.7.2.alpha3$ time ./sage
ellbsd.sage
real 0m4.957s
user 0m4.528s
sys 0m0.388s
king@mpc622:/mnt/local/king/SAGE/rebase/sage-4.7.2.alpha3$ time ./sage
ellbsd.sage
real 0m4.620s
user 0m4.288s
sys 0m0.280s
king@mpc622:/mnt/local/king/SAGE/rebase/sage-4.7.2.alpha3$ time ./sage
ellbsd.sage
real 0m4.615s
user 0m4.256s
sys 0m0.308s
king@mpc622:/mnt/local/king/SAGE/rebase/sage-4.7.2.alpha3$ time ./sage
ellbsd.sage
real 0m4.721s
user 0m4.344s
sys 0m0.344s
}}}
and
{{{
king@mpc622:/mnt/local/king/SAGE/rebase/sage-4.7.2.alpha3$ time ./sage
elltest1.sage
real 0m16.435s
user 0m16.025s
sys 0m0.292s
king@mpc622:/mnt/local/king/SAGE/rebase/sage-4.7.2.alpha3$ time ./sage
elltest1.sage
real 0m16.981s
user 0m16.565s
sys 0m0.304s
king@mpc622:/mnt/local/king/SAGE/rebase/sage-4.7.2.alpha3$ time ./sage
elltest1.sage
real 0m16.626s
user 0m16.173s
sys 0m0.396s
king@mpc622:/mnt/local/king/SAGE/rebase/sage-4.7.2.alpha3$ time ./sage
elltest1.sage
real 0m16.950s
user 0m16.493s
sys 0m0.384s
king@mpc622:/mnt/local/king/SAGE/rebase/sage-4.7.2.alpha3$ time ./sage
elltest1.sage
real 0m16.946s
user 0m16.461s
sys 0m0.412s
}}}
The result with the first patch from #11935 (one has to pick one of the
two patches) is similar. That shows how much speed up is still possible
with a clever usage of categories. But the methods used there go beyond
what I am doing here - that's why I opened a separate ticket.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11900#comment:86>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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