int-micro.js revision 877:cf4d2252d444 
1/*
2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 *   - Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 *
11 *   - Redistributions in binary form must reproduce the above copyright
12 *     notice, this list of conditions and the following disclaimer in the
13 *     documentation and/or other materials provided with the distribution.
14 *
15 *   - Neither the name of Oracle nor the names of its
16 *     contributors may be used to endorse or promote products derived
17 *     from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32
33function bench(name, func) {
34    var start = Date.now();
35    for (var iter = 0; iter < 5000000; iter++) {
36        func();
37    }
38    print(name + "\t" + (Date.now() - start));
39}
40
41function uint32(value) {
42    return function() {
43        value >>> 0;
44        value >>> 0;
45        value >>> 0;
46        value >>> 0;
47        value >>> 0;
48        value >>> 0;
49        value >>> 0;
50        value >>> 0;
51        value >>> 0;
52        value >>> 0;
53        value >>> 0;
54        value >>> 0;
55        value >>> 0;
56        value >>> 0;
57        value >>> 0;
58    };
59}
60
61function int32(value) {
62    return function() {
63        value >> 0;
64        value >> 0;
65        value >> 0;
66        value >> 0;
67        value >> 0;
68        value >> 0;
69        value >> 0;
70        value >> 0;
71        value >> 0;
72        value >> 0;
73        value >> 0;
74        value >> 0;
75        value >> 0;
76        value >> 0;
77        value >> 0;
78    };
79}
80
81print("\nToUint32");
82for (var i = 1; i < 3; i++) {
83    bench("infinity      ", uint32(Infinity));
84    bench("infinity neg  ", uint32(-Infinity));
85    bench("nan           ", uint32(NaN));
86    bench("small         ", uint32(1));
87    bench("small neg     ", uint32(-1));
88    bench("small frac    ", uint32(1.5));
89    bench("small neg frac", uint32(-1.5));
90    bench("large         ", uint32(9223372036854775807));
91    bench("large neg     ", uint32(-9223372036854775808));
92}
93
94print("\nToInt32");
95for (var i = 1; i < 3; i++) {
96    bench("infinity      ", int32(Infinity));
97    bench("infinity neg  ", int32(-Infinity));
98    bench("nan           ", int32(NaN));
99    bench("small         ", int32(1));
100    bench("small neg     ", int32(-1));
101    bench("small frac    ", int32(1.5));
102    bench("small neg frac", int32(-1.5));
103    bench("large         ", int32(9223372036854775807));
104    bench("large neg     ", int32(-9223372036854775808));
105}
106
107
108