1/*
2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24import java.util.*;
25import java.nio.*;
26import java.nio.charset.*;
27
28public class StrCodingBenchmarkUTF8 {
29
30    public static void main(String[] args) throws Throwable {
31
32        final int itrs = Integer.getInteger("iterations", 100000);
33        final int size = 2048;
34        final int subsize    = Integer.getInteger("subsize", 128);
35        final Random rnd = new Random();
36        final int maxchar    = 0x7f;
37
38        Charset charset = Charset.forName("UTF-8");
39        final String csn = charset.name();
40        final Charset cs = charset;
41
42        int[] starts = new int[] { 0, 0x80, 0x800, 0x10000};
43        for (int nb = 1; nb <= 4; nb++) {
44
45            final CharsetEncoder enc = cs.newEncoder();
46
47            char[] cc = new char[size];
48            int i = 0;
49            while (i < size - 3) {
50                i += Character.toChars(starts[nb - 1] + rnd.nextInt(maxchar), cc, i);
51            }
52
53            final String string = new String(cc);
54            final byte[] bytes  = string.getBytes(cs);
55
56            System.out.printf("%n--------%s[nb=%d]---------%n", csn, nb);
57            int sz = 12;
58            while (sz < size) {
59                System.out.printf("   [len=%d]%n", sz);
60                final byte[] bs  = Arrays.copyOf(bytes, sz);
61                final String str = new String(bs, csn);
62                StrCodingBenchmark.Job[] jobs = {
63                    new StrCodingBenchmark.Job("String decode: csn") {
64                    public void work() throws Throwable {
65                        for (int i = 0; i < itrs; i++)
66                            new String(bs, csn);
67                    }},
68
69                    new StrCodingBenchmark.Job("String decode: cs") {
70                    public void work() throws Throwable {
71                        for (int i = 0; i < itrs; i++)
72                            new String(bs, cs);
73                    }},
74
75                    new StrCodingBenchmark.Job("String encode: csn") {
76                    public void work() throws Throwable {
77                        for (int i = 0; i < itrs; i++)
78                                str.getBytes(csn);
79                    }},
80
81                    new StrCodingBenchmark.Job("String encode: cs") {
82                    public void work() throws Throwable {
83                         for (int i = 0; i < itrs; i++)
84                          str.getBytes(cs);
85                    }},
86                };
87                StrCodingBenchmark.time(StrCodingBenchmark.filter(null, jobs));
88                sz <<= 1;
89            }
90        }
91    }
92}
93