#11530: Conversion of finite field elements to PARI mangles Mod
------------------------------+---------------------------------------------
Reporter: rbeezer | Owner: AlexGhitza
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.7.1
Component: algebra | Keywords: _pari_init_, variable name,
finite field
Work_issues: | Upstream: N/A
Reviewer: Jeroen Demeyer | Author: Simon King
Merged: | Dependencies:
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Comment(by rbeezer):
v2 patch is a tweak of Simon's nice patch. Passes all tests in
sage/rings. I think this will allow totally removing the two versions of
{{{_finite_field_ext_pari_modulus_as_str()}}}. I am going to test the
removal with a test of the full Sage library.
Without search and replace, we get a 2x speedup. I have not posted my
search/replace patch since it seems useless now.
Timings, all in microseconds, of the two commands below.
{{{
sage: F.<a>=GF(3^5)
sage: a._pari_init_()
sage: a._pari_init_('b')
var=None var='b'
4.7 status quo 779 780
Rob search/replace 782 787
Simon 781 381
Simon + Rob (v2) 369 381
}}}
So it appears better coding will get us speed improvements. Imagine that!
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11530#comment:8>
Sage <http://www.sagemath.org>
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