a simple os.stat performance test

mtime_test.py

import os, os.path, sys, time

if not len(sys.argv) in (2, 3):
    print "Usage: %s dir_to_scan [num_tests]" % (sys.argv[0],)
    sys.exit(1)

num_tests = 5
if len(sys.argv) == 3:
    try:
        num_tests = int(sys.argv[2])
    except ValueError:
        print "num_tests must be an integer!"
        sys.exit(1)

for testnum in xrange(num_tests):
    start = time.time()
    mtimes = []
    for root, dirs, files in os.walk(sys.argv[1]):
        for file in files:
            path = os.path.join(root, file)
            try:
                mtimes.append(os.stat(path).st_mtime)
            except OSError:
                pass
    end = time.time()
    
    calls = len(mtimes)
    
    print "%i files in %f seconds: %f files/second" % (calls, end - start, float(calls) / (end - start))