NO-JIRA add a benchmark for CompositeReadableBuffer string decode
diff --git a/tests/performance-jmh/src/main/java/org/apache/qpid/proton/codec/CompositeReadableBufferStringDecodeBenchmark.java b/tests/performance-jmh/src/main/java/org/apache/qpid/proton/codec/CompositeReadableBufferStringDecodeBenchmark.java
new file mode 100644
index 0000000..8d8ea96
--- /dev/null
+++ b/tests/performance-jmh/src/main/java/org/apache/qpid/proton/codec/CompositeReadableBufferStringDecodeBenchmark.java
@@ -0,0 +1,108 @@
+/*
+ * 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.qpid.proton.codec;
+
+import java.nio.charset.CharacterCodingException;
+import java.nio.charset.CharsetDecoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+import java.util.concurrent.TimeUnit;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
+import org.openjdk.jmh.infra.Blackhole;
+import org.openjdk.jmh.profile.GCProfiler;
+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;
+
+@State(Scope.Benchmark)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@Warmup(iterations = 5, time = 1)
+@Measurement(iterations = 5, time = 1)
+public class CompositeReadableBufferStringDecodeBenchmark {
+
+ private static final String PAYLOAD =
+ "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789"
+ + "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789"
+ + "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789"
+ + "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789"
+ + "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789";
+
+ private static final String PAYLOAD_CHUNK =
+ "0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789";
+
+ private final CharsetDecoder charsetDecoder = StandardCharsets.UTF_8.newDecoder();
+
+ private CompositeReadableBuffer singleArrayString;
+ private CompositeReadableBuffer splitArrayString;
+
+ private Blackhole blackhole;
+
+ @Setup
+ public void init(Blackhole blackhole) {
+ this.blackhole = blackhole;
+
+ byte[] payload = PAYLOAD.getBytes(StandardCharsets.UTF_8);
+ singleArrayString = new CompositeReadableBuffer();
+ singleArrayString.append(payload);
+
+ splitArrayString = new CompositeReadableBuffer();
+
+ byte[] payloadChunk = PAYLOAD_CHUNK.getBytes(StandardCharsets.UTF_8);
+ for (int i = 0; i < 5; i++) {
+ splitArrayString.append(Arrays.copyOf(payloadChunk, payloadChunk.length));
+ }
+ }
+
+ @Benchmark
+ public void decodeSingleArray() throws CharacterCodingException {
+ this.charsetDecoder.reset();
+ blackhole.consume(singleArrayString.readString(charsetDecoder));
+ }
+
+ @Benchmark
+ public void decodeMultiArray() throws CharacterCodingException {
+ this.charsetDecoder.reset();
+ blackhole.consume(splitArrayString.readString(charsetDecoder));
+ }
+
+ public static void main(String[] args) throws RunnerException {
+ runBenchmark(CompositeReadableBufferStringDecodeBenchmark.class);
+ }
+
+ public static void runBenchmark(Class<?> benchmarkClass) throws RunnerException {
+ final Options opt = new OptionsBuilder()
+ .include(benchmarkClass.getSimpleName())
+ .addProfiler(GCProfiler.class)
+ .shouldDoGC(true)
+ .warmupIterations(5)
+ .measurementIterations(5)
+ .forks(1)
+ .build();
+ new Runner(opt).run();
+ }
+}
