chao
/
mini_cocopi


			
				
					
						
						
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							<!DOCTYPE html>
<html>
<!--
Copyright 2009 The Closure Library Authors. All Rights Reserved.

Use of this source code is governed by the Apache License, Version 2.0.
See the COPYING file for details.
-->
<!--
-->
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
  <title>Closure Performance Tests - UTF8 encoding and decoding</title>
  <link rel="stylesheet" type="text/css"
        href="../testing/performancetable.css"/>
  <script src="../base.js"></script>
  <script>
    goog.require('goog.crypt');
    goog.require('goog.string');
    goog.require('goog.testing.PerformanceTable');
    goog.require('goog.testing.jsunit');
  </script>
</head>
<body>
  <h1>Closure Performance Tests - UTF8 encoding and decoding</h1>
  <p>
    <strong>User-agent:</strong>
    <script>document.write(navigator.userAgent);</script>
  </p>
  <div id="perfTable"></div>
  <hr>

  <script>
    var table = new goog.testing.PerformanceTable(
        goog.dom.getElement('perfTable'));

    var STRING_LENGTH = 100000;

    function testDecodeAscii() {
      var arr = [];
      for (var i = 0; i < STRING_LENGTH; i++) {
        arr.push(120);
      }
      table.run(goog.partial(goog.crypt.utf8ByteArrayToString, arr),
          'Decode UTF8 byte array with ASCII characters (1 byte / character)');
    }

    function testDecodeLatin() {
      var arr = [];
      for (var i = 0; i < STRING_LENGTH; i++) {
        arr.push(195, 182);
      }
      table.run(goog.partial(goog.crypt.utf8ByteArrayToString, arr),
          'Decode UTF8 byte array with Latin characters (2 bytes / character)');
    }

    function testDecodeLeftArrow() {
      var arr = [];
      for (var i = 0; i < STRING_LENGTH; i++) {
        arr.push(226, 134, 144);
      }
      table.run(goog.partial(goog.crypt.utf8ByteArrayToString, arr),
          'Decode UTF8 byte array with left arrows (3 bytes / character)');
    }

    function testEncodeAscii() {
      var str = goog.string.repeat('x', STRING_LENGTH);
      table.run(goog.partial(goog.crypt.stringToUtf8ByteArray, str),
          'Encode ASCII string (1 byte / character)');
    }

    function testEncodeLatin() {
      var str = goog.string.repeat('\u00F6', STRING_LENGTH);
      table.run(goog.partial(goog.crypt.stringToUtf8ByteArray, str),
          'Encode Latin string (2 bytes / character)');
    }

    function testEncodeLeftArrow() {
      var str = goog.string.repeat('\u2190', STRING_LENGTH);
      table.run(goog.partial(goog.crypt.stringToUtf8ByteArray, str),
          'Encode left arrows (3 bytes / character)');
    }
  </script>
</body>
</html>