#4824: speed up conversion of matrices from sage to pari
----------------------------+-----------------------------------------------
 Reporter:  was             |       Owner:  was     
     Type:  enhancement     |      Status:  new     
 Priority:  major           |   Milestone:  sage-3.4
Component:  linear algebra  |    Keywords:          
----------------------------+-----------------------------------------------
 This is kind of sad, given that pari(...) is done entirely in C-level
 Cython compiled code in memory, and the magma(...) conversion is done
 using pexpect and the file system!
 {{{
 sage: a = random_matrix(ZZ,1000,x=-10,y=10)
 sage: time m = magma(a)
 CPU times: user 0.14 s, sys: 0.02 s, total: 0.16 s
 Wall time: 0.36 s
 sage: time b= pari(a)
 CPU times: user 21.51 s, sys: 0.72 s, total: 22.23 s
 Wall time: 22.24 s
 }}}

 Fixing this will help with some algorithms, such as Hermite form.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4824>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of 
Reinventing the Wheel
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