#11683: ell_curve_isogeny initialization
-------------------------------+--------------------------------------------
Reporter: saraedum | Owner: cremona
Type: enhancement | Status: new
Priority: minor | Milestone: sage-4.7.2
Component: elliptic curves | Keywords: startup, initialization
Work_issues: | Upstream: Not yet reported upstream;
Will do shortly.
Reviewer: | Author:
Merged: | Dependencies:
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The import of sage/schemes/elliptic_curves/ell_curve_isogeny.py (which
happens on every startup of sage) takes a relatively big amount of time
{{{
$ time ./sage -startuptime|grep ell_curve_isogeny:
ell_curve_isogeny: 0.133 (ell_field)
real 0m0.994s
user 0m0.810s
sys 0m0.154s
}}}
Lazily computing the constants in this file helps a lot (see the attached
patch):
{{{
$ time ./sage -startuptime|grep ell_curve_isogeny:
ell_curve_isogeny: 0.001 (ell_field)
real 0m0.849s
user 0m0.672s
sys 0m0.164s
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11683>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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