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#!/usr/bin/python
#
# Small helper for perftest runs.
#
import os
import sys
import subprocess
def main():
count = int(sys.argv[1])
time_min = None
for i in xrange(count):
cmd = [
'time',
'-f', '%U',
'--quiet',
sys.argv[2], # cmd
sys.argv[3] # testcase
]
#print(repr(cmd))
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = p.communicate()
retval = p.wait()
#print(i, retval, stdout, stderr)
if retval != 0:
print 'n/a'
return
time = float(stderr)
#print(i, time)
if time_min is None:
time_min = time
else:
time_min = min(time_min, time)
# /usr/bin/time has only two digits of resolution
print('%.02f' % time_min)
if __name__ == '__main__':
main()