#8905: Memory leak in echelon over QQ
-------------------------+--------------------------------------------------
   Reporter:  SimonKing  |       Owner:  tbd               
       Type:  defect     |      Status:  new               
   Priority:  major      |   Milestone:  sage-4.4.2        
  Component:  memleak    |    Keywords:  memleak echelonize
     Author:             |    Upstream:  N/A               
   Reviewer:             |      Merged:                    
Work_issues:             |  
-------------------------+--------------------------------------------------

Comment(by SimonKing):

 Similarly, one gets
 {{{
 sage: MS = MatrixSpace(QQ,8)
 sage: M = MS.random_element()
 sage: M = M.stack(M)
 sage: v = copy(M).left_kernel()
 sage: n = 0
 sage: mem = get_memory_usage()
 sage: while(1):
 ....:     n+=1
 ....:     if get_memory_usage()>mem:
 ....:         mem = get_memory_usage()
 ....:         print mem,n
 ....:     v = copy(M).left_kernel()
 ....:
 800.3828125 27
 800.51171875 62
 800.640625 94
 800.76953125 151
 801.05078125 168
 801.1796875 187
 801.30859375 221
 801.4375 256
 801.56640625 278
 801.71484375 314
 802.08984375 375
 802.21875 423
 802.34765625 460
 802.4765625 497
 802.60546875 521
 802.8984375 610
 803.02734375 635
 803.15625 690
 }}}
 I guess the two are related.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8905#comment:2>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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