Mega Trim Test (v47)

Revision 47 of this benchmark created by James Edward Lewis II on

Description

Trim function

Changes from /20:

  • Removed allocation during benchmark
  • Warmed-up functions
  • Removed polymorphic call
  • Added check call at teardown

Changes from /34:

  • moved all preparation to setup area
  • optimized es5_shim implementation
  • added optimized es6_shim implementation
  • removed test27, which tested against too few whitespace characters
  • created more helpful error message

Setup

var ws = ['[\x09-\x0D\x20\xA0\u1680\u180E\u2000-\u200A\u202F\u205F\u3000',
        '\u2028\u2029\uFEFF]+'].join('');
    /* Source of es5_shim(str): https://github.com/es-shims/es5-shim/blob/master/es5-shim.js#L1393 */
    var es5_shim = function () {
      'use strict';
      var trimBeginRegexp = new RegExp('^' + ws),
        trimEndRegexp = new RegExp(ws + '$');
      return function es5_shim(str) {
        return str.replace(trimBeginRegexp, '').replace(trimEndRegexp, '');
      };
    }();
    
    /* Source of es6_shim(str): https://github.com/es-shims/es6-shim/blob/master/es6-shim.js#L529 */
    var es6_shim = function () {
      'use strict';
      var trimRegexp = new RegExp(['^', ws, '|', ws, '$'].join(''), 'g');
      return function es6_shim(str) {
        return str.replace(trimRegexp, '');
      };
    }();
    
    function trim28(str) {
      'use strict';
      var l = str.length, i, j, c;
      for (i = 0; i < l; i++) {     
        c = str.charCodeAt(i);                   
        if (c < 8192) {
          if (c < 256 && (c === 32 || (c >= 9 && c <= 13) || c === 160)) continue;
          else if (c === 5760 || c === 6158) continue;
          break;
        } else if (c <= 8202 || c === 8232 || c === 8233 || c === 8239 || c === 8287 || c === 12288) continue;
        break;
      }
      for (j = l - 1; j >= i; j--) {
        c = str.charCodeAt(j);
        if (c < 8192) {
          if (c < 256 && (c === 32 || (c >= 9 && c <= 13) || c === 160)) continue;
          else if (c === 5760 || c === 6158) continue;
          break;
        } else if (c <= 8202 || c === 8232 || c === 8233 || c === 8239 || c === 8287 || c === 12288) continue;
        break;
      }
      return str.substring(i, j + 1);
    }
    
    function trim27a(str) {
      'use strict';
      var l = str.length, i, j, c;
      for (i = 0; i < l; i++) {
        c = str.charCodeAt(i);
        if (c === 32 || c === 10 || c === 13 || c === 9 || c === 12 || c === 11 || c === 160 || c === 5760 || c === 6158 || c === 8192 || c === 8193 || c === 8194 || c === 8195 || c === 8196 || c === 8197 || c === 8198 || c === 8199 || c === 8200 || c === 8201 || c === 8202 || c === 8232 || c === 8233 || c === 8239 || c === 8287 || c === 12288) continue;
        else break;
      }
      for (j = l - 1; j >= i; j--) {
        c = str.charCodeAt(j);
        if (c === 32 || c === 10 || c === 13 || c === 9 || c === 12 || c === 11 || c === 160 || c === 5760 || c === 6158 || c === 8192 || c === 8193 || c === 8194 || c === 8195 || c === 8196 || c === 8197 || c === 8198 || c === 8199 || c === 8200 || c === 8201 || c === 8202 || c === 8232 || c === 8233 || c === 8239 || c === 8287 || c === 12288) continue;
        else break;
      }
      return str.substring(i, j + 1);
    }
    
    function trim_native(str) {
      'use strict';
      return str.trim(); // should throw if no such function
    }
    
    var inp = '    \n\n \n\n   a \n a\n  a\n    a\n   a  \n\t\ta\t\ta\njahsdkjahkjshdakjhsdkahskd akhsjdh akjshd kashdkajhsd kajshd \nkauyiuqhwep iasldk qpwoie ad  \n   askdjaslkdjaslkjdaoiur qowioqwhr aspodiquw ijasod iqwiue pqowipoqiw epoqiwpeo iaslkjdqur \t kjahsdkj hakshd\nkajhdk\nk as d  \t\n'.split('\n'),
      buffer = new Array(inp.length),
      correct = ['', '', '', '', 'a', 'a', 'a', 'a', 'a', 'a            a',
        'jahsdkjahkjshdakjhsdkahskd akhsjdh akjshd kashdkajhsd kajshd',
        'kauyiuqhwep iasldk qpwoie ad', 'askdjaslkdjaslkjdaoiur qowioqwhr aspodiquw ijasod iqwiue pqowipoqiw epoqiwpeo iaslkjdqur        kjahsdkj hakshd', 'kajhdk', 'k as d', ''];
    
    function e1() {
      'use strict';
      for (var i = 0, len = inp.length; i < len; i++)
        buffer[i] = trim_native(inp[i]);
      return buffer;
    }
    
    function e2() {
      'use strict';
      for (var i = 0, len = inp.length; i < len; i++)
        buffer[i] = trim27a(inp[i]);
      return buffer;
    }
    
    function e3() {
      'use strict';
      for (var i = 0, len = inp.length; i < len; i++)
        buffer[i] = trim28(inp[i]);
      return buffer;
    }
    
    function e4() {
      'use strict';
      for (var i = 0, len = inp.length; i < len; i++)
        buffer[i] = es6_shim(inp[i]);
      return buffer;
    }
    
    function e5() {
      'use strict';
      for (var i = 0, len = inp.length; i < len; i++)
        buffer[i] = es5_shim(inp[i]);
      return buffer;
    }
    
    var l = 10000;
    while (l--) {
      e1();
      e2();
      e3();
      e4();
      e5();
    }

Teardown


    for (var l = correct.length, errbuf = [], i = l - 1; i--;)
      if (a[i] !== correct[i])
        errbuf.push([a[i], correct[i]].join(' !== '));
    if (errbuf.length)
      throw new Error('Invalid Tests: ' + errbuf.join(' | '));

Test runner

Ready to run.

Testing in
TestOps/sec
trim-native
var a = e1();
ready
trim27a
var a = e2();
ready
trim28
var a = e3();
ready
es6_shim
var a = e4();
ready
es5_shim
var a = e5();
ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.