[PATCH 2 of 2] contrib: explicitly enable perf extension for revset tests

[Olle Lundberg]

# HG changeset patch
# User Olle Lundberg <geek at nerd.sh>
# Date 1395785415 -3600
#      Tue Mar 25 23:10:15 2014 +0100
# Node ID 70f6451218676456ac47fa3b75fbcef37fabf96d
# Parent  5c9e0e96192c55a6cd4e468b0f72f8f4d339c82e
contrib: explicitly enable perf extension for revset tests

If a developer doesn't have the perf extension enabled the revset
benchmarking will fail. This patch explicitly enables the
perf extension when running the tests.

diff --git a/contrib/revsetbenchmarks.sh b/contrib/revsetbenchmarks.sh
--- a/contrib/revsetbenchmarks.sh
+++ b/contrib/revsetbenchmarks.sh
@@ -12,12 +12,12 @@
 #
 # This script also does one run of the current version of mercurial installed
 # to compare performance.
 
 HG="hg update"
-PERF="./hg perfrevset"
-BASE_PERF="hg perfrevset"
+PERF="./hg --config extensions.perf=contrib/perf.py perfrevset"
+BASE_PERF="hg --config extensions.perf=contrib/perf.py perfrevset"
 
 TARGETS=$1
 shift
 # read from a file or from standard output
 if [ $# -ne 0 ]; then