diff --git a/src/test/java/org/warp/jcwdb/tests/Performance.java b/src/test/java/org/warp/jcwdb/tests/Performance.java
index 54cb39b..fda4a9a 100644
--- a/src/test/java/org/warp/jcwdb/tests/Performance.java
+++ b/src/test/java/org/warp/jcwdb/tests/Performance.java
@@ -12,6 +12,7 @@ import org.warp.jcwdb.ann.*;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.ArrayList;
 
 public class Performance {
@@ -31,7 +32,16 @@ public class Performance {
 	 */
 	public static void main(String[] args) throws IOException, InterruptedException {
 		FAST_TESTS = args.length > 0 && args[0].equalsIgnoreCase("true");
-		rootDirectory = Files.createTempDirectory("performance-tests");
+		if (args.length >= 2) {
+			rootDirectory = Paths.get(args[1]);
+			try {
+				Files.createDirectory(rootDirectory);
+			} catch (Exception ex) {
+
+			}
+		} else {
+			rootDirectory = Files.createTempDirectory("performance-tests");
+		}
 		generateDb();
 		System.out.println("Performance test started.");
 		System.out.println("-------------------------------------------------------+-----------------------------------------------------------------");