#11544: Viewing matrices of algebraic numbers can take a long time
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Reporter: rbeezer | Owner: jason, was
Type: defect | Status: needs_review
Priority: major | Milestone: sage-4.7.2
Component: linear algebra | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author: Rob Beezer
Merged: | Dependencies:
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Comment(by rbeezer):
This probably needs a bit more explanation.
One feature of #10627 is to replace specific matrix entries by a symbol.
To look up this translation in a dictionary, entries of a matrix are
hashed. For QQbar, this hash is expensive (#11543).
This patch prevents a look-up if the translation dictionary is empty.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11544#comment:5>
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