@BenchmarkMode(Mode.Throughput)
 @OutputTimeUnit(TimeUnit.SECONDS)
 @Benchmark
 public void param1Log4j1Concat() {
   log4j1Logger.debug("This is a debug [" + ++j + "] message");
 }
 @BenchmarkMode(Mode.Throughput)
 @OutputTimeUnit(TimeUnit.SECONDS)
 @Benchmark
 public void param3Log4j1Concat() {
   log4j1Logger.debug("Val1=" + ++j + ", val2=" + ++k + ", val3=" + ++m);
 }