[sage-devel] Re: Determinant is very slow for sparse matrices

2009-02-28 Thread Jason Bandlow
William Stein wrote: > On Sat, Feb 28, 2009 at 2:49 PM, Jason Bandlow wrote: >> This seems like a bug to me: >> >>sage: dd = {(0,0):1} >>sage: %timeit matrix(8,dd).det() >>10 loops, best of 3: 213 ms per loop >>sage: %timeit matrix(8,dd,sparse = False).det() >>

[sage-devel] Re: Determinant is very slow for sparse matrices

2009-02-28 Thread William Stein
On Sat, Feb 28, 2009 at 2:49 PM, Jason Bandlow wrote: > > This seems like a bug to me: > >        sage: dd = {(0,0):1} >        sage: %timeit matrix(8,dd).det() >        10 loops, best of 3: 213 ms per loop >        sage: %timeit matrix(8,dd,sparse = False).det() >        100 loops, best of 3: 62