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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)
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