mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-10-09 16:34:44 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 17

Issue #18983: Allow selection of output units in timeit.

Browse source 
This allows manual selection of a specific unit such as usecs rather than the
use of a heuristic. This is intended to aid machine processing of timeit
output.

Patch by Serhiy Storchaka.
This commit is contained in:
Robert Collins 2015-03-18 09:54:50 +13:00
parent f024d263b4
commit 302dbc6792
4 changed files with 55 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

34
Lib/timeit.py
View file

@ -19,6 +19,7 @@ Options:
-t/--time: use time.time() (deprecated)
-c/--clock: use time.clock() (deprecated)
-v/--verbose: print raw timing results; repeat for more digits precision
-u/--unit: set the output time unit (usec, msec, or sec)
-h/--help: print this usage message and exit
--: separate options from statement, use when statement starts with -
statement: statement to be timed (default 'pass')
@ -250,10 +251,10 @@ def main(args=None, *, _wrap_timer=None):
args = sys.argv[1:]
import getopt
try:
opts, args = getopt.getopt(args, "n:s:r:tcpvh",
opts, args = getopt.getopt(args, "n:u:s:r:tcpvh",
["number=", "setup=", "repeat=",
"time", "clock", "process",
"verbose", "help"])
"verbose", "unit=", "help"])
except getopt.error as err:
print(err)
print("use -h/--help for command line help")
@ -264,12 +265,21 @@ def main(args=None, *, _wrap_timer=None):
setup = []
repeat = default_repeat
verbose = 0
time_unit = None
units = {"usec": 1, "msec": 1e3, "sec": 1e6}
precision = 3
for o, a in opts:
if o in ("-n", "--number"):
number = int(a)
if o in ("-s", "--setup"):
setup.append(a)
if o in ("-u", "--unit"):
if a in units:
time_unit = a
else:
print("Unrecognized unit. Please select usec, msec, or sec.",
file=sys.stderr)
return 2
if o in ("-r", "--repeat"):
repeat = int(a)
if repeat <= 0:
@ -319,15 +329,21 @@ def main(args=None, *, _wrap_timer=None):
print("raw times:", " ".join(["%.*g" % (precision, x) for x in r]))
print("%d loops," % number, end=' ')
usec = best * 1e6 / number
if usec < 1000:
print("best of %d: %.*g usec per loop" % (repeat, precision, usec))
if time_unit is not None:
print("best of %d: %.*g %s per loop" % (repeat, precision,
usec/units[time_unit], time_unit))
else:
msec = usec / 1000
if msec < 1000:
print("best of %d: %.*g msec per loop" % (repeat, precision, msec))
if usec < 1000:
print("best of %d: %.*g usec per loop" % (repeat, precision, usec))
else:
sec = msec / 1000
print("best of %d: %.*g sec per loop" % (repeat, precision, sec))
msec = usec / 1000
if msec < 1000:
print("best of %d: %.*g msec per loop" % (repeat,
precision, msec))
else:
sec = msec / 1000
print("best of %d: %.*g sec per loop" % (repeat,
precision, sec))
return None
if __name__ == "__main__":