1
// Copyright 2012 The Closure Library Authors. All Rights Reserved.
2
//
3
// Licensed under the Apache License, Version 2.0 (the "License");
4
// you may not use this file except in compliance with the License.
5
// You may obtain a copy of the License at
6
//
7
//      http://www.apache.org/licenses/LICENSE-2.0
8
//
9
// Unless required by applicable law or agreed to in writing, software
10
// distributed under the License is distributed on an "AS-IS" BASIS,
11
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12
// See the License for the specific language governing permissions and
13
// limitations under the License.
14

15
/**
16
 * @fileoverview JSON performance tests.
17
 */
18

19
goog.provide('goog.jsonPerf');
20

21
goog.require('goog.dom');
22
goog.require('goog.json');
23
goog.require('goog.math');
24
goog.require('goog.string');
25
goog.require('goog.testing.PerformanceTable');
26
goog.require('goog.testing.PropertyReplacer');
27
goog.require('goog.testing.jsunit');
28

29
goog.setTestOnly('goog.jsonPerf');
30

31
var table = new goog.testing.PerformanceTable(goog.dom.getElement('perfTable'));
32

33
var stubs = new goog.testing.PropertyReplacer();
34

35
function tearDown() {
36
  stubs.reset();
37
}
38

39
function testSerialize() {
40
  var obj = populateObject({}, 50, 4);
41

42
  table.run(function() {
43
    var s = JSON.stringify(obj);
44
  }, 'Stringify using JSON.stringify');
45

46
  table.run(function() {
47
    var s = goog.json.serialize(obj);
48
  }, 'Stringify using goog.json.serialize');
49
}
50

51
function testParse() {
52
  var obj = populateObject({}, 50, 4);
53
  var s = JSON.stringify(obj);
54

55
  table.run(function() { var o = JSON.parse(s); }, 'Parse using JSON.parse');
56

57
  table.run(function() {
58
    var o = goog.json.parse(s);
59
  }, 'Parse using goog.json.parse');
60

61
  table.run(function() {
62
    var o = goog.json.unsafeParse(s);
63
  }, 'Parse using goog.json.unsafeParse');
64
}
65

66

67
/**
68
 * @param {!Object} obj The object to add properties to.
69
 * @param {number} numProperties The number of properties to add.
70
 * @param {number} depth The depth at which to recursively add properties.
71
 * @return {!Object} The object given in obj (for convenience).
72
 */
73
function populateObject(obj, numProperties, depth) {
74
  if (depth == 0) {
75
    return randomLiteral();
76
  }
77

78
  // Make an object with a mix of strings, numbers, arrays, objects, booleans
79
  // nulls as children.
80
  for (var i = 0; i < numProperties; i++) {
81
    var bucket = goog.math.randomInt(3);
82
    switch (bucket) {
83
      case 0:
84
        obj[i] = randomLiteral();
85
        break;
86
      case 1:
87
        obj[i] = populateObject({}, numProperties, depth - 1);
88
        break;
89
      case 2:
90
        obj[i] = populateObject([], numProperties, depth - 1);
91
        break;
92
    }
93
  }
94
  return obj;
95
}
96

97

98
function randomLiteral() {
99
  var bucket = goog.math.randomInt(3);
100
  switch (bucket) {
101
    case 0:
102
      return goog.string.getRandomString();
103
    case 1:
104
      return Math.random();
105
    case 2:
106
      return Math.random() >= .5;
107
  }
108
  return null;
109
}
110

111