CharsetForNameBenchmark.java revision 5a7833b406bb2716b057d3ed923f22f1f86b2a20 
1/*
2 * Copyright (C) 2010 Google Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package benchmarks.regression;
18
19import java.nio.charset.Charset;
20import com.google.caliper.Param;
21import com.google.caliper.SimpleBenchmark;
22
23public class CharsetForNameBenchmark extends SimpleBenchmark {
24    // canonical    => canonical charset name
25    // built-in     => guaranteed-present charset
26    // special-case => libcore treats this charset specially for performance
27    @Param({
28        "UTF-16",     //     canonical,     built-in, non-special-case
29        "UTF-8",      //     canonical,     built-in,     special-case
30        "UTF8",       // non-canonical,     built-in,     special-case
31        "ISO-8859-1", //     canonical,     built-in,     special-case
32        "8859_1",     // non-canonical,     built-in,     special-case
33        "ISO-8859-2", //     canonical, non-built-in, non-special-case
34        "8859_2",     // non-canonical, non-built-in, non-special-case
35        "US-ASCII",   //     canonical,     built-in,     special-case
36        "ASCII"       // non-canonical,     built-in,     special-case
37    })
38    private String charsetName;
39
40    public void timeCharsetForName(int reps) throws Exception {
41        for (int i = 0; i < reps; ++i) {
42            Charset.forName(charsetName);
43        }
44    }
45}
46