Implicit decode benchmark

gistfile1.txt

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   "cells": [
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def convert1(s):\n",
      "    if isinstance(s, str):\n",
      "        return s\n",
      "    elif isinstance(s, unicode):\n",
      "        return s.encode('utf8')\n",
      "\n",
      "def convert2(s):\n",
      "    if isinstance(s, unicode):\n",
      "        return s.encode('utf8')\n",
      "    elif isinstance(s, str):\n",
      "        return s\n",
      "\n",
      "def convert3(s):\n",
      "    if isinstance(s, basestring):\n",
      "        return s.encode('utf8')\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 1
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# cpython2\n",
      "print('bytes')\n",
      "%timeit convert1(b'111111111111111111111111111')\n",
      "%timeit convert2(b'111111111111111111111111111')\n",
      "%timeit convert3(b'111111111111111111111111111')\n",
      "print('unicode')\n",
      "%timeit convert1(u'111111111111111111111111111')\n",
      "%timeit convert2(u'111111111111111111111111111')\n",
      "%timeit convert3(u'111111111111111111111111111')\n",
      "\n",
      "long_bytes = b'123456789abcdef' * 100\n",
      "long_unicode = u'123456789abcdef' * 100\n",
      "\n",
      "print('long bytes')\n",
      "%timeit convert1(long_bytes)\n",
      "%timeit convert2(long_bytes)\n",
      "%timeit convert3(long_bytes)\n",
      "print('long unicode')\n",
      "%timeit convert1(long_unicode)\n",
      "%timeit convert2(long_unicode)\n",
      "%timeit convert3(long_unicode)\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "bytes\n",
        "10000000 loops, best of 3: 157 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "1000000 loops, best of 3: 333 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "1000000 loops, best of 3: 737 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "unicode\n",
        "1000000 loops, best of 3: 726 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "1000000 loops, best of 3: 529 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "1000000 loops, best of 3: 604 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "long bytes\n",
        "10000000 loops, best of 3: 161 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "1000000 loops, best of 3: 349 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "100000 loops, best of 3: 4.98 \u00b5s per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "long unicode\n",
        "1000000 loops, best of 3: 1.77 \u00b5s per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "1000000 loops, best of 3: 1.58 \u00b5s per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "1000000 loops, best of 3: 1.65 \u00b5s per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n"
       ]
      }
     ],
     "prompt_number": 2
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# pypy2\n",
      "print('bytes')\n",
      "%timeit convert1(b'111111111111111111111111111')\n",
      "%timeit convert2(b'111111111111111111111111111')\n",
      "%timeit convert3(b'111111111111111111111111111')\n",
      "print('unicode')\n",
      "%timeit convert1(u'111111111111111111111111111')\n",
      "%timeit convert2(u'111111111111111111111111111')\n",
      "%timeit convert3(u'111111111111111111111111111')\n",
      "\n",
      "long_bytes = b'123456789abcdef' * 100\n",
      "long_unicode = u'123456789abcdef' * 100\n",
      "\n",
      "print('long bytes')\n",
      "%timeit convert1(long_bytes)\n",
      "%timeit convert2(long_bytes)\n",
      "%timeit convert3(long_bytes)\n",
      "print('long unicode')\n",
      "%timeit convert1(long_unicode)\n",
      "%timeit convert2(long_unicode)\n",
      "%timeit convert3(long_unicode)\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "bytes\n",
        "100000000 loops, best of 3: 2.36 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "100000000 loops, best of 3: 2.3 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "10000000 loops, best of 3: 136 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "unicode\n",
        "10000000 loops, best of 3: 64.9 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "10000000 loops, best of 3: 65.7 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "10000000 loops, best of 3: 65.5 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "long bytes\n",
        "100000000 loops, best of 3: 2.22 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "100000000 loops, best of 3: 2.33 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "100000 loops, best of 3: 7.46 \u00b5s per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "long unicode\n",
        "100000 loops, best of 3: 3.17 \u00b5s per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "100000 loops, best of 3: 3.19 \u00b5s per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "100000 loops, best of 3: 3.19 \u00b5s per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n"
       ]
      }
     ],
     "prompt_number": 3
    }
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