1 files changed, 43 insertions, 0 deletions
diff --git a/Tools/pybench/clockres.py b/Tools/pybench/clockres.py
new file mode 100644
index 0000000..64095b3
--- /dev/null
+++ b/Tools/pybench/clockres.py
@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+
+""" clockres - calculates the resolution in seconds of a given timer.
+
+    Copyright (c) 2006, Marc-Andre Lemburg (mal@egenix.com). See the
+    documentation for further information on copyrights, or contact
+    the author. All Rights Reserved.
+
+"""
+import time
+
+TEST_TIME = 1.0
+
+def clockres(timer):
+    d = {}
+    wallclock = time.time
+    start = wallclock()
+    stop = wallclock() + TEST_TIME
+    spin_loops = range(1000)
+    while 1:
+        now = wallclock()
+        if now >= stop:
+            break
+        for i in spin_loops:
+            d[timer()] = 1
+    values = d.keys()
+    values.sort()
+    min_diff = TEST_TIME
+    for i in range(len(values) - 1):
+        diff = values[i+1] - values[i]
+        if diff < min_diff:
+            min_diff = diff
+    return min_diff
+
+if __name__ == '__main__':
+    print 'Clock resolution of various timer implementations:'
+    print 'time.clock:           %10.3fus' % (clockres(time.clock) * 1e6)
+    print 'time.time:            %10.3fus' % (clockres(time.time) * 1e6)
+    try:
+        import systimes
+        print 'systimes.processtime: %10.3fus' % (clockres(systimes.processtime) * 1e6)
+    except ImportError:
+        pass