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/*
* Copyright (C) 2019 The Android Open Source Project
*
* 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.
*/
public class StringBuilderAppendBenchmark {
public static String string1 = "s1";
public static String string2 = "s2";
public static String longString1 = "This is a long string 1";
public static String longString2 = "This is a long string 2";
public static int int1 = 42;
public static double double1 = 42.0;
public static double double2 = 1.0E308;
public static float float1 = 42.0f;
public static float float2 = 1.0E38f;
public void timeAppendStrings(int count) {
String s1 = string1;
String s2 = string2;
int sum = 0;
for (int i = 0; i < count; ++i) {
String result = s1 + s2;
sum += result.length(); // Make sure the append is not optimized away.
}
if (sum != count * (s1.length() + s2.length())) {
throw new AssertionError();
}
}
public void timeAppendLongStrings(int count) {
String s1 = longString1;
String s2 = longString2;
int sum = 0;
for (int i = 0; i < count; ++i) {
String result = s1 + s2;
sum += result.length(); // Make sure the append is not optimized away.
}
if (sum != count * (s1.length() + s2.length())) {
throw new AssertionError();
}
}
public void timeAppendStringAndInt(int count) {
String s1 = string1;
int i1 = int1;
int sum = 0;
for (int i = 0; i < count; ++i) {
String result = s1 + i1;
sum += result.length(); // Make sure the append is not optimized away.
}
if (sum != count * (s1.length() + Integer.toString(i1).length())) {
throw new AssertionError();
}
}
public void timeAppendStringAndDouble(int count) {
String s1 = string1;
double d1 = double1;
int sum = 0;
for (int i = 0; i < count; ++i) {
String result = s1 + d1;
sum += result.length(); // Make sure the append is not optimized away.
}
if (sum != count * (s1.length() + Double.toString(d1).length())) {
throw new AssertionError();
}
}
public void timeAppendStringAndHugeDouble(int count) {
String s1 = string1;
double d2 = double2;
int sum = 0;
for (int i = 0; i < count; ++i) {
String result = s1 + d2;
sum += result.length(); // Make sure the append is not optimized away.
}
if (sum != count * (s1.length() + Double.toString(d2).length())) {
throw new AssertionError();
}
}
public void timeAppendStringAndFloat(int count) {
String s1 = string1;
float f1 = float1;
int sum = 0;
for (int i = 0; i < count; ++i) {
String result = s1 + f1;
sum += result.length(); // Make sure the append is not optimized away.
}
if (sum != count * (s1.length() + Float.toString(f1).length())) {
throw new AssertionError();
}
}
public void timeAppendStringAndHugeFloat(int count) {
String s1 = string1;
float f2 = float2;
int sum = 0;
for (int i = 0; i < count; ++i) {
String result = s1 + f2;
sum += result.length(); // Make sure the append is not optimized away.
}
if (sum != count * (s1.length() + Float.toString(f2).length())) {
throw new AssertionError();
}
}
public void timeAppendStringDoubleStringAndFloat(int count) {
String s1 = string1;
String s2 = string2;
double d1 = double1;
float f1 = float1;
int sum = 0;
for (int i = 0; i < count; ++i) {
String result = s1 + d1 + s2 + f1;
sum += result.length(); // Make sure the append is not optimized away.
}
if (sum != count * (s1.length() +
Double.toString(d1).length() +
s2.length() +
Float.toString(f1).length())) {
throw new AssertionError();
}
}
}
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