#8506: Inefficient hash for homsets
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Reporter: robertwb | Owner: cremona
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.3.4
Component: elliptic curves | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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Comment(by robertwb):
My original concern was that hashing the parents I was using was way to
expensive. In particular, it was using the Parent as a key in the coercion
model, and the dict lookup was many times more expensive than the actual
arithmetic (or anything else I was doing in that function...)
{{{UniqueRepresentation}}} is special, as one doesn't have to worry about
hashes being unequal for equal objects.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8506#comment:4>
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