Mercurial > hg
view tests/test-mq-qdiff @ 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> |
---|---|
date | Thu, 27 Sep 2007 23:57:57 -0500 |
parents | 61fcd9fac434 |
children | 034f444902d9 |
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#!/bin/sh echo "[extensions]" >> $HGRCPATH echo "mq=" >> $HGRCPATH echo % init hg init a cd a echo % commit echo 'base' > base hg ci -Ambase -d '1 0' echo % qnew mqbase hg qnew -mmqbase mqbase echo % qrefresh echo 'patched' > base hg qrefresh echo % qdiff hg qdiff | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \ -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/" echo % qdiff dirname hg qdiff . | sed -e "s/\(+++ [a-zA-Z0-9_/.-]*\).*/\1/" \ -e "s/\(--- [a-zA-Z0-9_/.-]*\).*/\1/"