Python int-check performance comparison

Perf comparison for int check between try-except and instancecheck.ipynb

{
 "metadata": {
  "name": "Perf comparison for int check between try-except and instancecheck"
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "# perf comparison\nimport numbers\ndef try_except(val):\n    try:\n        return val == int(val)\n    except:\n        return False\n\ndef check_integral(val):\n    return isinstance(val, (int, numbers.Integral))",
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 4
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "false_vals = ['a', 'x', '1', 1.25, 3.21, 0.0000234234234,\n        '13234235029352039590235902390590230592', 'ace', None]\ntrue_vals = [1, 2, 3, 4, 5, 6, 1341342034902590L]\nfor x in false_vals:\n    print(repr(x))\n    assert not try_except(x)\n    assert not check_integral(x)\n    print(\"try_except\")\n    %timeit try_except(x)\n    print(\"check_integral\")\n    %timeit check_integral(x)\nfor x in true_vals:\n    print(repr(x))\n    assert try_except(x)\n    assert check_integral(x)\n    print(\"try_except\")\n    %timeit try_except(x)\n    print(\"check_integral\")\n    %timeit check_integral(x)",
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "'a'\ntry_except\n100000 loops, best of 3: 3.83 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n100000 loops, best of 3: 4.08 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n'x'\ntry_except\n100000 loops, best of 3: 4.74 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n100000 loops, best of 3: 4.34 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n'1'\ntry_except\n1000000 loops, best of 3: 1.59 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n100000 loops, best of 3: 4.17 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n1.25\ntry_except\n1000000 loops, best of 3: 582 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n100000 loops, best of 3: 4.16 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n3.21\ntry_except\n1000000 loops, best of 3: 570 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n100000 loops, best of 3: 4.14 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n2.34234234e-05\ntry_except\n1000000 loops, best of 3: 614 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n100000 loops, best of 3: 4.35 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n'13234235029352039590235902390590230592'\ntry_except\n1000000 loops, best of 3: 1.79 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n100000 loops, best of 3: 4.43 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n'ace'\ntry_except\n100000 loops, best of 3: 4 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n100000 loops, best of 3: 4.22 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\nNone\ntry_except\n100000 loops, best of 3: 3.17 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n100000 loops, best of 3: 4.27 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n1\ntry_except\n1000000 loops, best of 3: 505 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n1000000 loops, best of 3: 559 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n2\ntry_except\n1000000 loops, best of 3: 505 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n1000000 loops, best of 3: 565 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n3\ntry_except\n1000000 loops, best of 3: 496 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n1000000 loops, best of 3: 553 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n4\ntry_except\n1000000 loops, best of 3: 496 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n1000000 loops, best of 3: 554 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n5\ntry_except\n1000000 loops, best of 3: 480 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n1000000 loops, best of 3: 562 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n6\ntry_except\n1000000 loops, best of 3: 492 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n1000000 loops, best of 3: 558 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n1341342034902590L\ntry_except\n1000000 loops, best of 3: 759 ns per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\ncheck_integral\n100000 loops, best of 3: 2.89 \u00b5s per loop"
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "\n"
      }
     ],
     "prompt_number": 6
    }
   ],
   "metadata": {}
  }
 ]
}