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from __future__ import absolute_import, print_function
import time
from scipy import weave
force = 0
N = 1000000
def list_append_scxx(a,Na):
code = """
for(int i = 0; i < Na;i++)
a.append(i);
"""
weave.inline(code,['a','Na'],force=force,verbose=2,compiler='gcc')
def list_append_c(a,Na):
code = """
for(int i = 0; i < Na;i++)
{
PyObject* oth = PyInt_FromLong(i);
int res = PyList_Append(py_a,oth);
Py_DECREF(oth);
if(res == -1)
{
PyErr_Clear(); //Python sets one
throw_error(PyExc_RuntimeError, "append failed");
}
}
"""
weave.inline(code,['a','Na'],force=force,compiler='gcc')
def list_append_py(a,Na):
for i in xrange(Na):
a.append(i)
def time_list_append(Na):
""" Compare the list append method from scxx to using the Python API
directly.
"""
print('list appending times:', end=' ')
a = []
t1 = time.time()
list_append_c(a,Na)
t2 = time.time()
print('py api: ', t2 - t1, '<note: first time takes longer -- repeat below>')
a = []
t1 = time.time()
list_append_c(a,Na)
t2 = time.time()
print('py api: ', t2 - t1)
a = []
t1 = time.time()
list_append_scxx(a,Na)
t2 = time.time()
print('scxx: ', t2 - t1)
a = []
t1 = time.time()
list_append_c(a,Na)
t2 = time.time()
print('python: ', t2 - t1)
#----------------------------------------------------------------------------
#
#----------------------------------------------------------------------------
def list_copy_scxx(a,b):
code = """
for(int i = 0; i < a.length();i++)
b[i] = a[i];
"""
weave.inline(code,['a','b'],force=force,verbose=2,compiler='gcc')
def list_copy_c(a,b):
code = """
for(int i = 0; i < a.length();i++)
{
int res = PySequence_SetItem(py_b,i,PyList_GET_ITEM(py_a,i));
if(res == -1)
{
PyErr_Clear(); //Python sets one
throw_error(PyExc_RuntimeError, "append failed");
}
}
"""
weave.inline(code,['a','b'],force=force,compiler='gcc')
def time_list_copy(N):
""" Compare the list append method from scxx to using the Python API
directly.
"""
print('list copy times:', end=' ')
a = [0] * N
b = [1] * N
t1 = time.time()
list_copy_c(a,b)
t2 = time.time()
print('py api: ', t2 - t1, '<note: first time takes longer -- repeat below>')
a = [0] * N
b = [1] * N
t1 = time.time()
list_copy_c(a,b)
t2 = time.time()
print('py api: ', t2 - t1)
a = [0] * N
b = [1] * N
t1 = time.time()
list_copy_scxx(a,b)
t2 = time.time()
print('scxx: ', t2 - t1)
a = [0] * N
b = [1] * N
t1 = time.time()
list_copy_c(a,b)
t2 = time.time()
print('python: ', t2 - t1)
if __name__ == "__main__":
time_list_copy(N)
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