SysPropTest - demonstrates how long it takes a particular java runtime to iterate through one billion invocations of System.getProperty(). There's possibly some efficiencies in this tight loop, so this is a best case. Authored to test likely impact of a planned Property adapter/facade.

SysPropTest.java

import java.lang.*;

public class SysPropTest {

    public static void main(String[] args) {
        final String propName = "com.example.test.PropertyName";

        long start = System.currentTimeMillis();
        for (int i = 0; i < 1000000000; i++ ) {
            String val = System.getProperty(propName);
            val = "abcdef";
        }
        long end = System.currentTimeMillis();

        long diff = end - start;
        System.out.println("ElapsedTime = " + Long.toString(diff) );
    }
}