#20968: more Hadamard matrices with constant diagonal
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Reporter: dimpase | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-7.3
Component: graph theory | Resolution:
Keywords: | Merged in:
Authors: Dima Pasechnik | Reviewers: Vincent Delecroix
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/dimpase/hadaconst | ed7e1f08f203c608c55ddf6fdb84c4f49705bfaf
Dependencies: | Stopgaps:
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Comment (by vdelecroix):
For all the squaring buisness it is much faster to use the '''methods'''
of Sage integers rather than the generic functions `is_square` and `sqrt`
{{{
sage: %timeit is_square(n)
1000000 loops, best of 3: 698 ns per loop
sage: %timeit n.is_square()
1000000 loops, best of 3: 139 ns per loop
sage: %timeit sqrt(n)
1000000 loops, best of 3: 860 ns per loop
sage: %timeit n.sqrtrem()
1000000 loops, best of 3: 172 ns per loop
}}}
(though it does not import much since the time is not spent here anyway)
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Ticket URL: <https://trac.sagemath.org/ticket/20968#comment:13>
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