performance

[kerzol81]

Hi,

Do you know any good diagnostic tool to compare 2 implementations?

First:

def converterA(qdate, qtime):
    """
    :param qdate: DDMMYY
    :param qtime: HHMMSS
    :return: YY-MM-DD HH-MM-SS
    """
    if not isinstance(qdate, str) or not isinstance(qtime, str):
        raise TypeError("parameters must be strings and valid datetime format (qdate: DDMMYY; qtime: HHMMSS)")
    from datetime import datetime

    return str(datetime.strptime(qdate + qtime, '%d%m%y%H%M%S'))

Second:

def converterB(qdate, qtime):
    """
    :param qdate: DDMMYY
    :param qtime: HHMMSS
    :return: YY-MM-DD HH-MM-SS
    """
    if not isinstance(qdate, str) or not isinstance(qtime, str):
        raise TypeError("parameters must be strings and valid datetime format (qdate: DDMMYY; qtime: HHMMSS)")
    """
    :param qdate: DDMMYY
    :param qtime: HHMMSS
    :return: YY-MM-DD HH-MM-SS
    """
    day = qdate[:2]
    month = qdate[2:4]
    year = '20{}'.format(qdate[4:])
    hour = qtime[:2]
    minute = qtime[2:4]
    second = qtime[4:]
    return '{}-{}-{} {}:{}:{}'.format(year, month, day, hour, minute, second)
    

I'd like to know which one is faster. According to unittest the 2nd one, but is this reliable?

import unittest
from converter import *


class ConverterB(unittest.TestCase):
    def test_valids(self):
        for i in range(10000000):
            self.assertEqual(converterB("021020", "010000"), "2020-10-02 01:00:00")