for_loop_list_comp.py

#!/usr/bin/env python

import collections

Topic = collections.namedtuple("Topic", ["render_type"])

def mk_example(n, render_type="Topic"):
    return [Topic(render_type=render_type) for _ in xrange(n)]

example = mk_example(25, "Topic") + mk_example(25, "Tutorial")

def test_for_loop():
    topics_by_render_type = {"Topic": [], "Tutorial": []}
    for t in example:
        topics_by_render_type[t.render_type].append(t)

def test_list_comp():
    topics = [t for t in example if t.render_type == "Topic"]
    tutorials = [t for t in example if t.render_type == "Tutorial"]

if __name__ == '__main__':
    import timeit
    print(timeit.timeit("test_for_loop()", setup="from __main__ import test_for_loop"))
    print(timeit.timeit("test_list_comp()", setup="from __main__ import test_list_comp"))

# python for_loop_list_comp.py
# for loop: 16.5271840096
# list comps: 23.9546978474