File: T.py

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# Simple interface to report execution times of program fragments.
# Call TSTART() to reset the timer, TSTOP(...) to report times.

import sys, os, time

def TSTART():
	global t0, t1
	u, s, cu, cs = os.times()
	t0 = u+cu, s+cs, time.time()

def TSTOP(*label):
	global t0, t1
	u, s, cu, cs = os.times()
	t1 = u+cu, s+cs, time.time()
	tt = []
	for i in range(3):
		tt.append(t1[i] - t0[i])
	[u, s, r] = tt
	msg = ''
	for x in label: msg = msg + (x + ' ')
	msg = msg + `u` + ' user, ' + `s` + ' sys, ' + `r` + ' real\n'
	sys.stderr.write(msg)