[Assorted-commits] SF.net SVN: assorted:[913] sandbox/trunk/src/java/ReflectionBench.java

[<yan...@us...>]

Revision: 913
          http://assorted.svn.sourceforge.net/assorted/?rev=913&view=rev
Author:   yangzhang
Date:     2008-07-30 03:15:58 +0000 (Wed, 30 Jul 2008)

Log Message:
-----------
added reflection benchmark

Added Paths:
-----------
    sandbox/trunk/src/java/ReflectionBench.java

Added: sandbox/trunk/src/java/ReflectionBench.java
===================================================================
--- sandbox/trunk/src/java/ReflectionBench.java	                        (rev 0)
+++ sandbox/trunk/src/java/ReflectionBench.java	2008-07-30 03:15:58 UTC (rev 913)
@@ -0,0 +1,31 @@
+public class ReflectionBench {
+	public static void main(String[] args) throws Exception {
+		Object object = new Object();
+		Class<?> c = Object.class;
+
+		int loops = 100000;
+
+		long start = System.currentTimeMillis();
+		for( int i = 0; i < loops; i++ )
+		{
+			object.toString();
+		}
+		System.out.println( loops + " regular method calls:" + (System.currentTimeMillis() - start) + " milliseconds." );
+		java.lang.reflect.Method method = c.getMethod( "toString" );
+
+		start = System.currentTimeMillis();
+		for( int i = 0; i < loops; i++ )
+		{
+			method.invoke( object );
+		}
+
+		System.out.println( loops + " reflective method calls without lookup:" + (System.currentTimeMillis() - start) + " milliseconds." );
+		start = System.currentTimeMillis();
+		for( int i = 0; i < loops; i++ )
+		{
+			method = c.getMethod( "toString" );
+			method.invoke( object );
+		}
+		System.out.println( loops + " reflective method calls with lookup:" + (System.currentTimeMillis() - start) + " milliseconds." );
+	}
+}


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