Mercurial > hg
view tests/test-issue619 @ 5339:058e93c3d07d
I have spotted the biggest bottleneck in "bdiff.c". Actually it was
pretty easy to find after I recompiled the python interpreter and
mercurial for profiling.
In "bdiff.c" function "equatelines" allocates the minimum hash table
size, which can lead to tons of collisions. I introduced an
"overcommit" factor of 16, this is, I allocate 16 times more memory
than the minimum value. Overcommiting 128 times does not improve the
performance over the 16-times case.
author | Christoph Spiel <cspiel@freenet.de> |
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date | Thu, 27 Sep 2007 23:57:57 -0500 |
parents | 8808ea7da86b |
children | 4c94b6d0fb1c |
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#!/bin/sh mkdir t cd t hg init echo a > a hg ci -Ama -d '1000000000 0' echo b > b hg branch b hg ci -Amb -d '1000000000 0' hg co -C 0 echo fast-forward hg merge b hg ci -Ammerge -d '1000000000 0' echo bogus fast-forward should fail hg merge b echo done