diff -r cacb26257190 perf.py
--- a/perf.py	Tue Sep 07 19:20:06 2010 +0200
+++ b/perf.py	Fri Nov 12 10:16:25 2010 -0800
@@ -1528,7 +1528,7 @@
         # Without this, Python may start and exit before the memory sampler
         # thread has time to work. We can't just do 'time.sleep(x)', because
         # under -S, 'import time' fails.
-        work = "for _ in xrange(200000): pass"
+        work = "i = 0\nwhile i < 200000: i += 1"
     command = python + cmd_opts + ["-c", work]
     mem_usage = []
     info("Running `%s` %d times", command, num_loops * 20)