#13991: Mitigate speed regressions in symmetric function related code due to
#12313
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Reporter: nbruin | Owner: sage-combinat
Type: enhancement | Status: new
Priority: major | Milestone: sage-5.8
Component: combinatorics | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: #13605 | Stopgaps:
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Comment (by leif):
Replying to [comment:32 nbruin]:
> Replying to [comment:31 leif]:
> > Haven't tried to yet. Just noticed the slowdown because testing the
file in ptestlong timed out. And rerunning the test shows "excessive"
memory usage, at least compared to Sage 5.7.beta4.
>
> Yes, that is as expected. The problem was diagnosed that continued
duplication of parents rather than reuse, so that's both slow and memory
intensive. Note that #13605 has positive review now. Merging that ticket
should resolve the regression completely.
Provided the patch from #13605 applies cleanly (to Sage 5.8.beta2), I'll
retry with that.
Verbosely running the tests twice for each installation (with a warm
filesystem cache) I get even worse timings (first run / second run):
Sage 5.7.beta4: 148.6 s / 145.9 s
Sage 5.8.beta2: 1738.3 s / 1702.1 s
(Wall time. "Constant" sysload during all tests.)
Let me know in case you still need details; I've used a patched
`ncadoctest.py` which for each line shows the wall time executing it took.
(Haven't "post-processed" the logs yet.)
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13991#comment:33>
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