#715: Parents probably not reclaimed due to too much caching
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Reporter: robertwb | Owner: somebody
Type: defect | Status: needs_info
Priority: major | Milestone: sage-4.8
Component: coercion | Keywords: weak cache coercion
Work_issues: Get some timings | Upstream: N/A
Reviewer: | Author: Simon King
Merged: | Dependencies: #9138, #11900
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Changes (by jpflori):
* status: needs_work => needs_info
* work_issues: Avoid a regression => Get some timings
Comment:
Your timings are kind of strange in comparison with what I get.
I was going to post what follows which I double checked:
I can finally confirm I do not get any serious speed regression with the
last couple of patches.
ptestlong gives something between 3100 and 3250 seconds with 5.0.prealpha0
vanilla or 715 applied.
Testing only sage.schemes with one core gives me between 1550 and 1600
with both in the same way.
And this time I confirm the test with random j-invariants is fixed by 715
and is not without (I'm getting paranoid now) as well as with a fixed
j-invariant.
I'll review the code and example next.
So when I saw your post, I ran "sage -t devel/sage/sage-
main/modules/free_modules.py" with both my installations (vanilla and
vanilla+715) and got several times about 13 sec for both ! maybe a mean
little lower for vanilla (at max .5 sec less).
I should mention I also get a quite big variance, not sure why, because my
system is not heavily loaded, maybe cos the disk is on NFS.
E.g. I got between 12.3 and 20.0 (just once) for vanilla and between
12.7and 19. (at the same time, so maybe the network was loaded at that
time ??)
For info I got a quite recent multicore Xeon running an outdated version
of Ubuntu 64 bits.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/715#comment:109>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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