Python - timers

Timers

Also see: http://pleac.sourceforge.net/pleac_python/datesandtimes.html

#----------------------------- 
# High Resolution Timers

t1 = time.clock()
# Do Stuff Here
t2 = time.clock()
print t2 - t1

# 2.27236813618
# Accuracy will depend on platform and OS,
# but time.clock() uses the most accurate timer it can

time.clock(); time.clock()
# 174485.51365466841
# 174485.55702610247

#----------------------------- 
# Also useful;
import timeit
code = '[x for x in range(10) if x % 2 == 0]'
eval(code)
# [0, 2, 4, 6, 8]

t = timeit.Timer(code)
print "10,000 repeats of that code takes:", t.timeit(10000), "seconds" 
print "1,000,000 repeats of that code takes:", t.timeit(), "seconds"

# 10,000 repeats of that code takes: 0.128238644856 seconds
# 1,000,000 repeats of that code takes:  12.5396490336 seconds

#----------------------------- 
import timeit
code = 'import random; l = random.sample(xrange(10000000), 1000); l.sort()' 
t = timeit.Timer(code)

print "Create a list of a thousand random numbers. Sort the list. Repeated a thousand times." 
print "Average Time:", t.timeit(1000) / 1000
# Time taken: 5.24391507859

Short Sleeps

#----------------------------- 
# Short Sleeps

seconds = 3.1
time.sleep(seconds)
print "boo"