Change default --reps value from 3 to 1.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@5423 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/perf/vg_perf.in b/perf/vg_perf.in
index 565f112..5af4828 100644
--- a/perf/vg_perf.in
+++ b/perf/vg_perf.in
@@ -87,7 +87,7 @@
 );
 
 # Command line options
-my $n_reps = 3;     # Run each program $n_reps times and choose the best one.
+my $n_reps = 1;     # Run each program $n_reps times and choose the best one.
 my @vgdirs;         # Dirs of the various Valgrinds being measured.
 
 my $num_tests_done   = 0;