example

Class Example

java.lang.Object

example.Example

public class Example
extends Object

A few example test cases which all convert ints to strings in a slight different way.

General rules on how to write test cases:

• If you define a constructor, it must not take any parameters.
• All test cases (benchmark methods) must be annotated with the Benchmark annotation so that the Runner class can find them.
• All test cases must take one int parameter and return a String (or null).
• The int parameter tells how many rounds the test case should run at that time. So, there is always a loop in each test case. This is used to reduce call overhead.
• Each test case should accumulate something and return it to prevent JVM from optimizing all of the code away because it does nothing. (The string will be printed after warmup and measure stages but otherwise it does not matter what it is.)
• If the Runner tells your test case is bad, it is probably something trivial or broken. Adding another loop inside the rounds loop might help. (A test case is bad if the rounds parameter overflow before Runner can measure a reasonable stable run time.)
• If you use static or instance attributes to hold test data, assign it to a local variable for better performance.

Constructor Summary

Constructors

Constructor and Description
Example() Initialize test data.

Method Summary

Modifier and Type	Method and Description
String	emptyPlusI(int rounds) Convert an int to a string by concatenating it with an empty string.
String	stringBuilderAppend(int rounds) Convert an int to a string by reusing an StringBuilder object.
String	stringValueOf(int rounds) Convert an int to a string using String.valueOf(int).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Example

public Example()

Initialize test data.

Method Detail

stringValueOf

public String stringValueOf(int rounds)
                     throws Exception

Convert an int to a string using String.valueOf(int).

Throws:

Exception

emptyPlusI

public String emptyPlusI(int rounds)
                  throws Exception

Convert an int to a string by concatenating it with an empty string.

Throws:

Exception

stringBuilderAppend

public String stringBuilderAppend(int rounds)
                           throws Exception

Convert an int to a string by reusing an StringBuilder object.

Throws:

Exception