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/*
* Copyright (C) 2010 The Guava Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.common.base;
import com.google.caliper.Param;
import com.google.caliper.Runner;
import com.google.caliper.SimpleBenchmark;
import com.google.common.base.Ascii;
import com.google.common.collect.Lists;
import com.google.common.primitives.Chars;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
import java.util.Random;
/**
* Benchmarks for the ASCII class.
*
* @author Kevin Bourrillion
*/
public class AsciiBenchmark extends SimpleBenchmark {
private static String ALPHA =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
private static String NONALPHA =
"0123456789`~-_=+[]{}|;:',.<>/?!@#$%^&*()\"\\";
@Param({"20", "2000"}) int size;
@Param({"2", "20"}) int nonAlphaRatio; // one non-alpha char per this many chars
@Param boolean noWorkToDo;
Random random;
String testString;
@Override protected void setUp() {
random = new Random();
int nonAlpha = size / nonAlphaRatio;
int alpha = size - nonAlpha;
List<Character> chars = Lists.newArrayListWithCapacity(size);
for (int i = 0; i < alpha; i++) {
chars.add(randomAlpha());
}
for (int i = 0; i < nonAlpha; i++) {
chars.add(randomNonAlpha());
}
Collections.shuffle(chars, random);
char[] array = Chars.toArray(chars);
this.testString = new String(array);
}
private char randomAlpha() {
return ALPHA.charAt(random.nextInt(ALPHA.length()));
}
private char randomNonAlpha() {
return NONALPHA.charAt(random.nextInt(NONALPHA.length()));
}
public int timeAsciiToUpperCase(int reps) {
String string = noWorkToDo
? Ascii.toUpperCase(testString)
: testString;
int dummy = 0;
for (int i = 0; i < reps; i++) {
dummy += Ascii.toUpperCase(string).length();
}
return dummy;
}
public int timeStringToUpperCase1(int reps) {
String string = noWorkToDo
? testString.toUpperCase()
: testString;
int dummy = 0;
for (int i = 0; i < reps; i++) {
dummy += string.toUpperCase().length();
}
return dummy;
}
public int timeStringToUpperCase2(int reps) {
String string = noWorkToDo
? testString.toUpperCase(Locale.US)
: testString;
int dummy = 0;
for (int i = 0; i < reps; i++) {
dummy += string.toUpperCase(Locale.US).length();
}
return dummy;
}
public static void main(String[] args) {
Runner.main(AsciiBenchmark.class, args);
}
}
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