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/*
* Copyright (C) 2009 Google Inc.
*
* 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 benchmarks.regression;
import com.google.caliper.Param;
import com.google.caliper.Runner;
import com.google.caliper.SimpleBenchmark;
/**
* Tests the performance of various StringBuilder methods.
*/
public class StringBuilderBenchmark extends SimpleBenchmark {
@Param({"1", "10", "100"}) private int length;
public void timeAppendBoolean(int reps) {
for (int i = 0; i < reps; ++i) {
StringBuilder sb = new StringBuilder();
for (int j = 0; j < length; ++j) {
sb.append(true);
}
}
}
public void timeAppendChar(int reps) {
for (int i = 0; i < reps; ++i) {
StringBuilder sb = new StringBuilder();
for (int j = 0; j < length; ++j) {
sb.append('c');
}
}
}
public void timeAppendCharArray(int reps) {
char[] chars = "chars".toCharArray();
for (int i = 0; i < reps; ++i) {
StringBuilder sb = new StringBuilder();
for (int j = 0; j < length; ++j) {
sb.append(chars);
}
}
}
public void timeAppendCharSequence(int reps) {
CharSequence cs = "chars";
for (int i = 0; i < reps; ++i) {
StringBuilder sb = new StringBuilder();
for (int j = 0; j < length; ++j) {
sb.append(cs);
}
}
}
public void timeAppendDouble(int reps) {
double d = 1.2;
for (int i = 0; i < reps; ++i) {
StringBuilder sb = new StringBuilder();
for (int j = 0; j < length; ++j) {
sb.append(d);
}
}
}
public void timeAppendFloat(int reps) {
float f = 1.2f;
for (int i = 0; i < reps; ++i) {
StringBuilder sb = new StringBuilder();
for (int j = 0; j < length; ++j) {
sb.append(f);
}
}
}
public void timeAppendInt(int reps) {
int n = 123;
for (int i = 0; i < reps; ++i) {
StringBuilder sb = new StringBuilder();
for (int j = 0; j < length; ++j) {
sb.append(n);
}
}
}
public void timeAppendLong(int reps) {
long l = 123;
for (int i = 0; i < reps; ++i) {
StringBuilder sb = new StringBuilder();
for (int j = 0; j < length; ++j) {
sb.append(l);
}
}
}
public void timeAppendObject(int reps) {
// We don't want to time the toString, so ensure we're calling a trivial one...
Object o = new Object() {
@Override public String toString() {
return "constant";
}
};
for (int i = 0; i < reps; ++i) {
StringBuilder sb = new StringBuilder();
for (int j = 0; j < length; ++j) {
sb.append(o);
}
}
}
public void timeAppendString(int reps) {
String s = "chars";
for (int i = 0; i < reps; ++i) {
StringBuilder sb = new StringBuilder();
for (int j = 0; j < length; ++j) {
sb.append(s);
}
}
}
}
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