BytesIO.ipynb

{
 "metadata": {
  "name": "",
  "signature": "sha256:cb77beb337d81f4520cac0ff01074619b9a04c7eaf8fa5405343cc8593ee2668"
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 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "from io import BytesIO\n",
      "from cStringIO import StringIO\n",
      "from six import BytesIO as six_BytesIO"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 1
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "data_small = b'foo'*1000\n",
      "data_large = b'foo'*1000000"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 3
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "%timeit -n 100000 BytesIO(data_small)\n",
      "%timeit -n 100000 StringIO(data_small)\n",
      "%timeit -n 100000 six_BytesIO(data_small)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "1000000 loops, best of 3: 401 ns per loop\n",
        "1000000 loops, best of 3: 345 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "1000000 loops, best of 3: 1.24 \u00b5s per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "%timeit -n 100000 BytesIO(data_large)\n",
      "%timeit -n 100000 StringIO(data_large)\n",
      "%timeit -n 100000 six_BytesIO(data_large)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "100000 loops, best of 3: 161 \u00b5s per loop\n",
        "100000 loops, best of 3: 395 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "100000 loops, best of 3: 1.28 \u00b5s per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n"
       ]
      }
     ],
     "prompt_number": 8
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "bio_small = BytesIO(data_small)\n",
      "sio_small = StringIO(data_small)\n",
      "six_small = six_BytesIO(data_small)\n",
      "\n",
      "bio_large = BytesIO(data_large)\n",
      "sio_large = StringIO(data_large)\n",
      "six_large = six_BytesIO(data_large)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 17
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "bio_small.seek(0)\n",
      "sio_small.seek(0)\n",
      "six_small.seek(0)\n",
      "\n",
      "%timeit -n 1000 bio_small.read(1)\n",
      "%timeit -n 1000 sio_small.read(1)\n",
      "%timeit -n 1000 six_small.read(1)\n",
      "\n",
      "%timeit -n 100000 bio_large.read(1)\n",
      "%timeit -n 100000 sio_large.read(1)\n",
      "%timeit -n 100000 six_large.read(1)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "1000 loops, best of 3: 422 ns per loop\n",
        "1000 loops, best of 3: 410 ns per loop\n",
        "1000 loops, best of 3: 1.26 \u00b5s per loop\n",
        "100000 loops, best of 3: 298 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "100000 loops, best of 3: 192 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n",
        "100000 loops, best of 3: 860 ns per loop"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n"
       ]
      }
     ],
     "prompt_number": 22
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "bio_small.seek(0)\n",
      "sio_small.seek(0)\n",
      "six_small.seek(0)\n",
      "\n",
      "bio_large.seek(0)\n",
      "sio_large.seek(0)\n",
      "six_large.seek(0)\n",
      "\n",
      "%timeit -n 100 bio_small.read(10)\n",
      "%timeit -n 100 sio_small.read(10)\n",
      "%timeit -n 100 six_small.read(10)\n",
      "\n",
      "%timeit -n 100 bio_large.read(1000)\n",
      "%timeit -n 100 sio_large.read(1000)\n",
      "%timeit -n 100 six_large.read(1000)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "100 loops, best of 3: 279 ns per loop\n",
        "100 loops, best of 3: 281 ns per loop\n",
        "100 loops, best of 3: 1.15 \u00b5s per loop\n",
        "100 loops, best of 3: 360 ns per loop\n",
        "100 loops, best of 3: 360 ns per loop\n",
        "100 loops, best of 3: 1.35 \u00b5s per loop\n"
       ]
      }
     ],
     "prompt_number": 24
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [],
     "language": "python",
     "metadata": {},
     "outputs": []
    }
   ],
   "metadata": {}
  }
 ]
}