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arrayfire-python/arrayfire/timer.py at v3.5 · arrayfire/arrayfire-python · GitHub
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arrayfire
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timer.py
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timer.py
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#######################################################
# Copyright (c) 2015, ArrayFire
# All rights reserved.
#
# This file is distributed under 3-clause BSD license.
# The complete license agreement can be obtained at:
# http://arrayfire.com/licenses/BSD-3-Clause
########################################################
"""
Functions to time arrayfire.
"""
from
.
library
import
*
from
.
device
import
(
sync
,
eval
)
from
time
import
time
import
math
def
timeit
(
af_func
,
*
args
):
"""
Function to time arrayfire functions.
Parameters
----------
af_func : arrayfire function
*args : arguments to `af_func`
Returns
--------
t : Time in seconds
"""
sample_trials
=
3
sample_time
=
1E20
for
i
in
range
(
sample_trials
):
start
=
time
()
res
=
af_func
(
*
args
)
eval
(
res
)
sync
()
sample_time
=
min
(
sample_time
,
time
()
-
start
)
if
(
sample_time
>=
0.5
):
return
sample_time
num_iters
=
max
(
math
.
ceil
(
1.0
/
sample_time
),
3.0
)
start
=
time
()
for
i
in
range
(
int
(
num_iters
)):
res
=
af_func
(
*
args
)
eval
(
res
)
sync
()
sample_time
=
(
time
()
-
start
)
/
num_iters
return
sample_time
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