--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/contrib/revsetbenchmarks.py	Wed Mar 26 18:03:30 2014 -0700
@@ -0,0 +1,58 @@
+#!/usr/bin/env python
+
+# 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.
+
+import sys
+from subprocess import check_call, check_output
+
+HG="hg update --quiet --check"
+PERF="./hg --config extensions.perf=contrib/perf.py perfrevset"
+
+target_rev = sys.argv[1]
+
+revsetsfile = sys.stdin
+if len(sys.argv) > 2:
+    revsetsfile = open(sys.argv[2])
+
+revsets = [l.strip() for l in revsetsfile]
+
+print "Revsets to benchmark"
+print "----------------------------"
+
+for idx, rset in enumerate(revsets):
+    print "%i) %s" % (idx, rset)
+
+print "----------------------------"
+print
+
+revs = check_output("hg log --template='{rev}\n' --rev " + target_rev,
+                    shell=True);
+
+revs = [r for r in revs.split() if r]
+
+# Benchmark revisions
+for r in revs:
+    print "----------------------------"
+    sys.stdout.write("Revision: ")
+    sys.stdout.flush()
+    check_call('hg log -r %s --template "{desc|firstline}\n"' % r, shell=True)
+
+    print "----------------------------"
+    check_call(HG + ' ' + r, shell=True)
+    for idx, rset in enumerate(revsets):
+        sys.stdout.write("%i) " % idx)
+        sys.stdout.flush()
+        check_call(PERF + ' "%s"' % rset, shell=True)
+    print "----------------------------"
+