[issue8685] set(range(100000)).difference(set()) is slow
report at bugs.python.org
Mon Aug 9 13:24:42 CEST 2010
Andrew Bennetts <spiv at users.sourceforge.net> added the comment:
On 2010-05-17 rhettinger wrote:
> Will look at this when I get back to the U.S.
Ping! This patch (set-difference-speedup-2.diff) has been sitting around for a fair few weeks now. It's a small patch, so it should be relatively easy to review. It makes a significant improvement to speed and memory in one case (which we have encountered and worked around in bzr), and has no significant downside to any other cases.
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