python vs cython vs ctypes + c, naive benchmark sources

building_commands.md

ctypes:

$ gcc -shared -Wl,-soname,timing_c.so -o timing_c.so -fPIC timing_c.c

cython:

$ cython2 *.pyx
$ gcc -shared -pthread -fPIC -fwrapv -O2 -Wall -fno-strict-aliasing -I/usr/include/python2.7 -o timing_cython.so timing_cython.c
$ gcc -shared -pthread -fPIC -fwrapv -O2 -Wall -fno-strict-aliasing -I/usr/include/python2.7 -o timing_cython_range.so timing_cython_range.c

timing_c.c

unsigned long sumrange(unsigned long arg)
{
    unsigned long i, x;
    x = 0;

    for (i = 0; i < arg; i++) {
        x = x + i;
    }
    return x;
}

timing_ctypes.py

import ctypes

test = ctypes.CDLL('./timing_c.so').sumrange
test.restype = ctypes.c_ulonglong
test.argtypes = ctypes.c_ulonglong,

timing_cython.pyx

cpdef long test(long val):
    cdef long sum = 0
    while val > 0:
        val -= 1
        sum += val

    return sum

timing_cython_range.pyx

cpdef long test(long val):
    cdef long sum = 0
    cdef long i = 0

    for i in range(val):
        sum += i

    return sum

timing_native.py

def test(val):
    sum(xrange(val))