Timing array loop performance : Array : Collections Data Structure : Java examples (example source code) Organized by topic

Java
C++
PHP


Java  »  Collections Data Structure   » [  Array  ]  Screenshots 
 



Timing array loop performance

public class TimeArray {
  public static void main(String args[]) {
    long startTime = System.currentTimeMillis();
    for (int i = 0, n = Integer.MAX_VALUE; i < n; i++) {
      ;
    }
    long midTime = System.currentTimeMillis();
    for (int i = Integer.MAX_VALUE - 1; i >= 0;) {
      ;
    }
    long endTime = System.currentTimeMillis();
    System.out.println("Increasing: " + (midTime - startTime));
    System.out.println("Decreasing: " + (endTime - midTime));
  }
}

           
       
Related examples in the same category
1.  Initialization and re-assignment of arrays Initialization and re-assignment of arrays
2.  Sorting, Searching, and Inserting into a sorted array Sorting, Searching, and Inserting into a sorted array
3.  Custom ArraySet implementation Custom ArraySet implementation
4.  Custom ArrayMap implementation Custom ArrayMap implementation
5.  Doubling the size of an array Doubling the size of an array
6.  Using reflection to check array type and length Using reflection to check array type and length
7.  Using reflection to create, fill, and display an array Using reflection to create, fill, and display an array
8.  ArrayEnumeration class ArrayEnumeration class
9.  Treating an Array as an Enumeration
10.  Converting a Collection to an Array Converting a Collection to an Array
11.  Array 2D Array 2D
12.  Can you change the .length of an array
13.  Demonstrate use of Arrays.sort on Booleans
14.  Show Two-Dimensional Array of Objects
15.  Convert an Array to a Vector
16.  ArrayListDemo done over using an ArrayList
17.  Array Hunt game
18.  Array Search Test
19.  Array Fill Test Array Fill Test
20.  Multi Dimension Array
21.  Clone Array
22.  Associates keys with values Associates keys with values
23.  Arrays of primitives
24.  Creating arrays with new
25.  Array initialization
26.  Creating an array of nonprimitive objects
27.  Create multidimension arrays Create multidimension arrays
28.  Java 1.5 (5.0) new features: Working with Arrays Java 1.5 (5.0) new features: Working with Arrays
29.  Initializing Array Values Initializing Array Values
30.  Creating a Two-Dimensional Array
31.  Initializing a Two Dimensional Array Initializing a Two Dimensional Array
32.  Using the length Variable Using the length Variable
33.  Triangular array
34.  Sort an array Sort an array
35.  Grow array Grow array
36.  Define array for class Define array for class
37.  String array and output to console String array and output to console
38.  Multiply two matrices
39.  Array Of Arrays Demo 2 Array Of Arrays Demo 2
40.  Array Copy Demo Array Copy Demo
41.  Java program to demonstrate multidimensional arrays Java program to demonstrate multidimensional arrays
























Home| Contact Us
Copyright 2003 - 04 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.