#10262: memory leak in scalar*vector multiplication
-----------------------------------------------+--------------------------
Reporter: dimpase | Owner: jason, was
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.2
Component: linear algebra | Resolution:
Keywords: linear algebra, memory leak | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by mmezzarobba):
Replying to [comment:4 dimpase]:
> My guess is that "an_element()" gets memoised, and retained instead of
being destroyed at each for-loop.
At least with #14711, the parent and its cached elements appear to be
correctly destroyed after each loop turn. However, calling `an_element()`
triggers the computation of a basis, and the whole basis is cached!
{{{
sage: for i in [4, 3, 2, 1, 4, 3, 2, 1]:
del A; gc.collect(); A=(1/2)*vector([x/2 for x in range(i*1000)]);
get_memory_usage()
....:
4029
2483.984375
4030
1842.5390625
3030
1831.33203125
2030
1831.33203125
1030
2483.984375
4030
1842.54296875
3030
1831.33203125
2030
1831.33203125
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/10262#comment:12>
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