#5623: 5x speedup in all_graph_colorings
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Reporter: carlohamalainen | Owner: boothby
Type: enhancement | Status: new
Priority: minor | Milestone: sage-3.4.1
Component: graph theory | Keywords:
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This patch changes all_graph_colorings to use the C++ dancing links
implementation instead of the Cython implementation.
* sage -testall is all ok
* valgrind is ok
* Roughly 5x speedup on some random graphs (see test.sage):
Sage 3.4 timing:
ca...@ka37:~/work/code/graphdlx$ sage test.sage
5 loops, best of 3: 158 ms per loop
ca...@ka37:~/work/code/graphdlx$ sage test.sage
5 loops, best of 3: 158 ms per loop
ca...@ka37:~/work/code/graphdlx$ sage test.sage
5 loops, best of 3: 157 ms per loop
Sage 3.4 with patch timing:
5 loops, best of 3: 33.5 ms per loop
ca...@ka37:~/work/code/graphdlx$ sage test.sage
5 loops, best of 3: 33.1 ms per loop
ca...@ka37:~/work/code/graphdlx$ sage test.sage
5 loops, best of 3: 33.3 ms per loop
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5623>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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