diff --git a/org.ntlab.reverseDebugger/src/org/ntlab/debuggingControl/SpeedTester.java b/org.ntlab.reverseDebugger/src/org/ntlab/debuggingControl/SpeedTester.java
index 9c80b8f..4c63c6b 100644
--- a/org.ntlab.reverseDebugger/src/org/ntlab/debuggingControl/SpeedTester.java
+++ b/org.ntlab.reverseDebugger/src/org/ntlab/debuggingControl/SpeedTester.java
@@ -42,19 +42,21 @@
 	private void test(MethodCaller mc, ObjectReference roots, String targetSignature, SpeedTestType type, final int LOOP)
 			throws InvalidTypeException, ClassNotLoadedException, InvocationException, IncompatibleThreadStateException {
 		int count = 0;
-		long beforeTime, afterTime, executionTime, sumTime = 0, bestTime = -1, worstTime = -1;
+		long beforeTime = 0, afterTime = 0, executionTime, sumTime = 0, bestTime = -1, worstTime = -1;
 		for (int i = 0; i < LOOP; i++) {
 			mc.setObj(roots);
-			beforeTime = System.nanoTime();
 			switch (type) {
 			case REVERSE_DEBUGGER:
+				beforeTime = System.nanoTime();				
 				count = countMethodExecutionInReverseDebugger(mc, targetSignature, 0, "--------");
+				afterTime = System.nanoTime();
 				break;
 			case TRACE_COLLECTOR:
+				beforeTime = System.nanoTime();
 				count = countMethodExecutionInTraceCollector(mc, targetSignature, 0, "--------");
+				afterTime = System.nanoTime();
 				break;
 			}
-			afterTime = System.nanoTime();
 			executionTime = afterTime - beforeTime;
 			System.out.print("count: " + count + "	");
 			System.out.println(String.format("Time%-2d: %10d nsec", (i + 1), executionTime));