Add performance test for FastRandomUUID generation compared to UUID.randomUUID

src/test/java/de/extio/game_engine/util/FastRandomUUIDTest.java

@@ -0,0 +1,34 @@
+package de.extio.game_engine.util;
+
+import java.util.UUID;
+
+import org.junit.jupiter.api.Test;
+
+public class FastRandomUUIDTest {
+	
+	@Test
+	void testPerformance() {
+		final int iterations = 10_000_000;
+		
+		long start = System.nanoTime();
+		for (int i = 0; i < iterations; i++) {
+			FastRandomUUID.create();
+		}
+		final long fastRandomUuidDuration = System.nanoTime() - start;
+		
+		start = System.nanoTime();
+		for (int i = 0; i < iterations; i++) {
+			UUID.randomUUID();
+		}
+		final long systemRandomUuidDuration = System.nanoTime() - start;
+		
+		System.out.println("=== UUID Generation Performance ===");
+		System.out.printf("FastRandomUUID.create():   %,d ns for %,d UUIDs (%.2f ns/UUID)%n", 
+			fastRandomUuidDuration, iterations, (double) fastRandomUuidDuration / iterations);
+		System.out.printf("UUID.randomUUID():         %,d ns for %,d UUIDs (%.2f ns/UUID)%n", 
+			systemRandomUuidDuration, iterations, (double) systemRandomUuidDuration / iterations);
+		System.out.printf("Speedup: %.2fx faster%n", 
+			(double) systemRandomUuidDuration / fastRandomUuidDuration);
+	}
+
+}