Running C_SHIT...

c_shit.c

#include <stdio.h>
#include <Python.h>

static PyObject * shit(PyObject *self, PyObject *args)
{
	signed long long int number;
	signed long long int steps;
	signed long long int i;
	signed long long int the_biggest = 0;
	for(i = 0; i < 1000000;i++) {
		steps = 0;
		number = i;
		while (number > 1) {
			if ( number % 2 == 0) {
				number = number / 2;
				steps = steps + 1;
			}
			else {
				number = 3*number + 1;
				steps = steps + 1;
			}
			if (steps > the_biggest) {
				the_biggest = steps;
			}
		}
	}
	return Py_BuildValue("l", the_biggest);
}

PyMethodDef methods[] = {
    {"shit", shit, METH_VARARGS, "Does shit"},
    {NULL, NULL, 0, NULL}
};

PyMODINIT_FUNC
initc_shit()
{
    (void) Py_InitModule("c_shit", methods);
}

c_shit2.c

#include <stdio.h>

int main()
{
	signed long long int number;
	signed long long int steps;
	signed long long int i;
	signed long long int the_biggest;
     the_biggest = 0;
	for(i = 0; i < 1000000;i++) {
		steps = 0;
		number = i;
		while (number > 1) {
			if ( number % 2 == 0) {
				number = number / 2;
				steps = steps + 1;
				}
			else
			{
				number = 3*number + 1;
				steps = steps + 1;
			}
			if (steps > the_biggest) {
				the_biggest = steps;
			}
			}
				}
	printf("%lld \n", the_biggest);
	return 0;
}

#[nagisa@godbox x]$ cc c_shit2.c && time ./a.out
#524 

#real	0m1.121s
#user	0m1.083s
#sys	0m0.033s

run.py

import c_shit

print c_shit.shit();

#[nagisa@godbox x]$ python2 setup.py build
#running build
#running build_ext
#[nagisa@godbox x]$ mv ./build/lib.linux-x86_64-2.7/c_shit.so ./c_shit.so
#[nagisa@godbox x]$ time python2 run.py
#524

#real	0m0.608s
#user	0m0.593s
#sys	0m0.010s

setup.py

from distutils.core import setup, Extension

setup(name = "Shit",
      version = "1.0",
      ext_modules = [Extension("c_shit", ["c_shit.c"])])

[nagisa@godbox x]$ time python2 run.py
524

real 0m0.876s
user 0m0.590s
sys 0m0.030s
[nagisa@godbox x]$ time python2 run.py
524

real 0m0.746s
user 0m0.593s
sys 0m0.020s
[nagisa@godbox x]$ time python2 run.py
524

real 0m0.618s
user 0m0.600s
sys 0m0.013s
[nagisa@godbox x]$ time python2 run.py
524

real 0m0.616s
user 0m0.597s
sys 0m0.013s
[nagisa@godbox x]$ time python2 run.py
524

real 0m0.619s
user 0m0.587s
sys 0m0.030s
[nagisa@godbox x]$ time python2 run.py
524

real 0m0.620s
user 0m0.597s
sys 0m0.020s
[nagisa@godbox x]$ time ./a.out
524

real 0m1.131s
user 0m1.090s
sys 0m0.040s
[nagisa@godbox x]$ time ./a.out
524

real 0m1.121s
user 0m1.083s
sys 0m0.033s
[nagisa@godbox x]$ time ./a.out
524

real 0m1.116s
user 0m1.077s
sys 0m0.033s
[nagisa@godbox x]$ time ./a.out
524

real 0m1.126s
user 0m1.087s
sys 0m0.037s
[nagisa@godbox x]$ time ./a.out
524

real 0m1.125s
user 0m1.070s
sys 0m0.047s
[nagisa@godbox x]$ time python2 run.py
524

real 0m0.610s
user 0m0.580s
sys 0m0.027s
[nagisa@godbox x]$ time ./a.out
524

real 0m1.122s
user 0m1.090s
sys 0m0.030s