Added reference benchmark to "compare" different runs

Author: Bytekeeper

src/test/java/bwapi/ClientDataBenchmark.java

@@ -55,6 +55,14 @@ private static String[] buildStrings() {
         return strings;
     }
 
+    @Benchmark
+    @Measurement(iterations = 2, time = 2)
+    @Warmup(time = 2)
+    @Fork(2)
+    public void reference(Blackhole blackhole) {
+        blackhole.consume(0);
+    }
+
     @Benchmark
     @OperationsPerInvocation(Client.MAX_COUNT)
     public int addUnitCommand(EmptyState s) {