string_join_test.py

# coding:utf-8
from __future__ import print_function

import gc
import os
import psutil
import sys
import time


class TimeIt(object):
    def __init__(self, scope_name="", fd=sys.stdout):
        self._start = None
        self._fd = fd
        self._fmt = 'block took {{secs:.5f}} seconds to run [{}]'.format(scope_name)

    def __enter__(self):
        # run the garbage collector
        # then disable it so it won't tamper with the measurments
        gc.collect()
        gc.disable()
        self._start = time.time()
        self._befor_rss = psutil.Process(os.getpid()).memory_info().rss

    def __exit__(self, exc_type, exc_val, exc_tb):
        now = time.time() - self._start
        print(self._fmt.format(secs=now).strip(), file=self._fd)
        print((psutil.Process(os.getpid()).memory_info().rss - self._befor_rss) / 1024.0)
        from guppy import hpy
        h = hpy()
        print(h.heap())
        # enable garbage collection after we're done with measurments
        gc.enable()


with TimeIt('+=') as ti:
    lis = ''

    for i in range(1000):
        lis += '<li>%s</li>' % str(i)

    result = '<ul>%s</ul>' % lis