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.

contrib/revsetbenchmarks.sh

@@ -1,89 +1,89 b''
 #!/bin/bash
 
 # Measure the performance of a list of revsets against multiple revisions
 # defined by parameter. Checkout one by one and run perfrevset with every
 # revset in the list to benchmark its performance.
 #
 # - First argument is a revset of mercurial own repo to runs against.
 # - Second argument is the file from which the revset array will be taken
 #   If second argument is omitted read it from standard input
 #
 # You should run this from the root of your mercurial repository.
 #
 # 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
     readarray REVSETS < $1
 else
     readarray REVSETS
 fi
 
 hg update --quiet
 
 echo "Starting time benchmarking"
 echo
 
 echo "Revsets to benchmark"
 echo "----------------------------"
 
 for (( j = 0; j < ${#REVSETS[@]}; j++ ));
 do
   echo "${j}) ${REVSETS[$j]}"
 done
 
 echo "----------------------------"
 echo
 
 # Benchmark baseline
 echo "Benchmarking baseline"
 
 for (( j = 0; j < ${#REVSETS[@]}; j++ ));
   do
     echo -n "${j}) "
     $BASE_PERF "${REVSETS[$j]}"
 done
 
 echo
 echo
 
 # Benchmark revisions
 for i in $(hg log --template='{rev}\n' --rev $TARGETS);
 do
   echo "----------------------------"
   echo -n "Revision: "
   hg log -r $i --template "{desc|firstline}"
 
   echo "----------------------------"
   $HG $i
   for (( j = 0; j < ${#REVSETS[@]}; j++ ));
   do
     echo -n "${j}) "
     $PERF "${REVSETS[$j]}"
   done
   echo "----------------------------"
 done
 
 $HG
 
 # Benchmark current code
 echo "Benchmarking current code"
 
 for (( j = 0; j < ${#REVSETS[@]}; j++ ));
   do
     echo -n "${j}) "
     $PERF "${REVSETS[$j]}"
 done
 
 
 echo
 echo "Time benchmarking finished"