import org.junit.Test;
import java.util.ArrayList;
import java.util.LinkedList;
public class PerformanceTest {
@Test
public void performance_test() {
ArrayList arrayList = new ArrayList();
LinkedList linkedList = new LinkedList();
// ArrayList add
long startTime = System.nanoTime();
for (int i = 0; i < 100000; i++) {
arrayList.add(i);
}
long endTime = System.nanoTime();
long duration = endTime - startTime;
System.out.println("ArrayList add: " + duration);
// LinkedList add
startTime = System.nanoTime();
for (int i = 0; i < 100000; i++) {
linkedList.add(i);
}
endTime = System.nanoTime();
duration = endTime - startTime;
System.out.println("LinkedList add: " + duration);
// ArrayList get
startTime = System.nanoTime();
for (int i = 0; i < 10000; i++) {
arrayList.get(i);
}
endTime = System.nanoTime();
duration = endTime - startTime;
System.out.println("ArrayList get: " + duration);
// LinkedList get
startTime = System.nanoTime();
for (int i = 0; i < 10000; i++) {
linkedList.get(i);
}
endTime = System.nanoTime();
duration = endTime - startTime;
System.out.println("LinkedList get: " + duration);
//
// // ArrayList remove
// startTime = System.nanoTime();
//
// for (int i = 9999; i >=0; i--) {
// arrayList.remove(i);
// }
// endTime = System.nanoTime();
// duration = endTime - startTime;
// System.out.println("ArrayList remove: " + duration);
//
// // LinkedList remove
// startTime = System.nanoTime();
//
// for (int i = 9999; i >=0; i--) {
// linkedList.remove(i);
// }
// endTime = System.nanoTime();
// duration = endTime - startTime;
// System.out.println("LinkedList remove: " + duration);
// ArrayList replace
startTime = System.nanoTime();
for (int i = 9999; i >=0; i--) {
arrayList.set(i, i * 2);
}
endTime = System.nanoTime();
duration = endTime - startTime;
System.out.println("ArrayList replace: " + duration);
// LinkedList replace
startTime = System.nanoTime();
for (int i = 9999; i >=0; i--) {
linkedList.set(i, i * 2);
}
endTime = System.nanoTime();
duration = endTime - startTime;
System.out.println("LinkedList replace: " + duration);
}
}
