diff --git a/src/main/java/org/apache/flink/benchmark/MultipleInputBenchmark.java b/src/main/java/org/apache/flink/benchmark/MultipleInputBenchmark.java
new file mode 100644
index 0000000..f070c59
--- /dev/null
+++ b/src/main/java/org/apache/flink/benchmark/MultipleInputBenchmark.java
@@ -0,0 +1,103 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.benchmark;
+
+import org.apache.flink.api.common.typeinfo.BasicTypeInfo;
+import org.apache.flink.benchmark.functions.LongSource;
+import org.apache.flink.benchmark.functions.QueuingLongSource;
+import org.apache.flink.benchmark.operators.MultiplyByTwoOperatorFactory;
+import org.apache.flink.streaming.api.datastream.DataStreamSource;
+import org.apache.flink.streaming.api.datastream.MultipleConnectedStreams;
+import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
+import org.apache.flink.streaming.api.functions.sink.DiscardingSink;
+import org.apache.flink.streaming.api.transformations.MultipleInputTransformation;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.OperationsPerInvocation;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.RunnerException;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+import org.openjdk.jmh.runner.options.VerboseMode;
+
+public class MultipleInputBenchmark extends BenchmarkBase {
+
+	public static final int RECORDS_PER_INVOCATION = TwoInputBenchmark.RECORDS_PER_INVOCATION;
+	public static final int ONE_IDLE_RECORDS_PER_INVOCATION = TwoInputBenchmark.ONE_IDLE_RECORDS_PER_INVOCATION;
+	public static final long CHECKPOINT_INTERVAL_MS = TwoInputBenchmark.CHECKPOINT_INTERVAL_MS;
+
+	public static void main(String[] args)
+		throws RunnerException {
+		Options options = new OptionsBuilder()
+			.verbosity(VerboseMode.NORMAL)
+			.include(".*" + MultipleInputBenchmark.class.getSimpleName() + ".*")
+			.build();
+
+		new Runner(options).run();
+	}
+
+	@Benchmark
+	@OperationsPerInvocation(RECORDS_PER_INVOCATION)
+	public void multiInputMapSink(FlinkEnvironmentContext context) throws Exception {
+
+		StreamExecutionEnvironment env = context.env;
+		env.enableCheckpointing(CHECKPOINT_INTERVAL_MS);
+
+		long numRecordsPerInput = RECORDS_PER_INVOCATION / 2;
+		DataStreamSource<Long> source1 = env.addSource(new LongSource(numRecordsPerInput));
+		DataStreamSource<Long> source2 = env.addSource(new LongSource(numRecordsPerInput));
+		connectAndDiscard(env, source1, source2);
+
+		env.execute();
+	}
+
+	@Benchmark
+	@OperationsPerInvocation(ONE_IDLE_RECORDS_PER_INVOCATION)
+	public void multiInputOneIdleMapSink(FlinkEnvironmentContext context) throws Exception {
+
+		StreamExecutionEnvironment env = context.env;
+		env.enableCheckpointing(CHECKPOINT_INTERVAL_MS);
+
+		QueuingLongSource.reset();
+		DataStreamSource<Long> source1 = env.addSource(new QueuingLongSource(1, ONE_IDLE_RECORDS_PER_INVOCATION - 1));
+		DataStreamSource<Long> source2 = env.addSource(new QueuingLongSource(2, 1));
+		connectAndDiscard(env, source1, source2);
+
+		env.execute();
+	}
+
+	private static void connectAndDiscard(
+			StreamExecutionEnvironment env,
+			DataStreamSource<Long> source1,
+			DataStreamSource<Long> source2) {
+		MultipleInputTransformation<Long> transform = new MultipleInputTransformation<>(
+				"custom operator",
+				new MultiplyByTwoOperatorFactory(),
+				BasicTypeInfo.LONG_TYPE_INFO,
+				1);
+
+		transform.addInput(source1.getTransformation());
+		transform.addInput(source2.getTransformation());
+
+		env.addOperator(transform);
+		new MultipleConnectedStreams(env)
+				.transform(transform)
+				.addSink(new DiscardingSink<>());
+	}
+}
diff --git a/src/main/java/org/apache/flink/benchmark/TwoInputBenchmark.java b/src/main/java/org/apache/flink/benchmark/TwoInputBenchmark.java
index d9291a8..fe39549 100644
--- a/src/main/java/org/apache/flink/benchmark/TwoInputBenchmark.java
+++ b/src/main/java/org/apache/flink/benchmark/TwoInputBenchmark.java
@@ -37,10 +37,8 @@
 public class TwoInputBenchmark extends BenchmarkBase {
 
 	public static final int RECORDS_PER_INVOCATION = 25_000_000;
-
 	public static final int ONE_IDLE_RECORDS_PER_INVOCATION = 15_000_000;
-
-	private static final long CHECKPOINT_INTERVAL_MS = 100;
+	public static final long CHECKPOINT_INTERVAL_MS = 100;
 
 	public static void main(String[] args)
 		throws RunnerException {
diff --git a/src/main/java/org/apache/flink/benchmark/operators/MultiplyByTwoOperatorFactory.java b/src/main/java/org/apache/flink/benchmark/operators/MultiplyByTwoOperatorFactory.java
new file mode 100644
index 0000000..657bc3f
--- /dev/null
+++ b/src/main/java/org/apache/flink/benchmark/operators/MultiplyByTwoOperatorFactory.java
@@ -0,0 +1,70 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.benchmark.operators;
+
+import org.apache.flink.streaming.api.operators.AbstractInput;
+import org.apache.flink.streaming.api.operators.AbstractStreamOperatorFactory;
+import org.apache.flink.streaming.api.operators.AbstractStreamOperatorV2;
+import org.apache.flink.streaming.api.operators.Input;
+import org.apache.flink.streaming.api.operators.MultipleInputStreamOperator;
+import org.apache.flink.streaming.api.operators.StreamOperator;
+import org.apache.flink.streaming.api.operators.StreamOperatorParameters;
+import org.apache.flink.streaming.runtime.streamrecord.StreamRecord;
+
+import java.util.Arrays;
+import java.util.List;
+
+@SuppressWarnings({"unchecked", "rawtypes"})
+public class MultiplyByTwoOperatorFactory extends AbstractStreamOperatorFactory<Long> {
+	@Override
+	public <T extends StreamOperator<Long>> T createStreamOperator(StreamOperatorParameters<Long> parameters) {
+		return (T) new MultiplyByTwoOperator(parameters);
+	}
+
+	@Override
+	public Class<? extends StreamOperator> getStreamOperatorClass(ClassLoader classLoader) {
+		return MultiplyByTwoOperator.class;
+	}
+
+	public static class MultiplyByTwoOperator extends AbstractStreamOperatorV2<Long> implements MultipleInputStreamOperator<Long> {
+		public MultiplyByTwoOperator(StreamOperatorParameters<Long> parameters) {
+			super(parameters, 2);
+		}
+
+		@Override
+		public List<Input> getInputs() {
+			return Arrays.asList(
+					new MultiplyByTwoOperator.MultiplyByTwoInput(this, 1),
+					new MultiplyByTwoOperator.MultiplyByTwoInput(this, 2));
+		}
+
+		private static class MultiplyByTwoInput extends AbstractInput<Long, Long> {
+			MultiplyByTwoInput(
+					AbstractStreamOperatorV2<Long> owner,
+					int inputId) {
+				super(owner, inputId);
+			}
+
+			@Override
+			public void processElement(StreamRecord<Long> element) {
+				output.collect(element.replace(element.getValue() * 2));
+			}
+		}
+	}
+}