BenchmarkPadding.java

/*
 * 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.table.data.binary.BinaryStringData;
import org.apache.flink.table.data.binary.BinaryStringDataUtil;
import org.apache.flink.table.runtime.util.SegmentsUtil;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.infra.Blackhole;
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 BinaryStringDataBenchmark extends BenchmarkBase {


    public static void main(String[] args) throws RunnerException {
        Options options =
                new OptionsBuilder()
                        .verbosity(VerboseMode.NORMAL)
                        .include(".*" + BinaryStringDataBenchmark.class.getCanonicalName() + ".*")
                        .build();

        new Runner(options).run();
    }

    private BinaryStringData str;
    private static int sizeToPad = 1000;

    @Setup
    public void setup() {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < sizeToPad; i++) {
            sb.append(i);
        }
        str = BinaryStringData.fromString(sb.toString());
    }

    @Benchmark
    public void useString(Blackhole blackhole) throws Exception {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < sizeToPad; i++) {
            sb.append(' ');
        }
        str.ensureMaterialized();
        blackhole.consume(BinaryStringData.fromString(str.getJavaObject() + sb.toString()));
    }

    @Benchmark
    public void useBytes(Blackhole blackhole) throws Exception {
        int srcSizeInBytes = str.getSizeInBytes();
        final byte[] newString = new byte[srcSizeInBytes + sizeToPad];
        for (int j = srcSizeInBytes; j < newString.length; j++) {
            newString[j] = (byte) 32; // space
        }
        System.arraycopy(str.toBytes(), 0, newString, 0, srcSizeInBytes);
        blackhole.consume(BinaryStringData.fromBytes(newString));
    }

    @Benchmark
    public void useBytesWithSegmentUtil(Blackhole blackhole) throws Exception {
        int srcSizeInBytes = str.getSizeInBytes();
        final byte[] newString = new byte[srcSizeInBytes + sizeToPad];
        for (int j = srcSizeInBytes; j < newString.length; j++) {
            newString[j] = (byte) 32; // space
        }
        SegmentsUtil.copyToBytes(str.getSegments(), 0, newString, 0, srcSizeInBytes);
        blackhole.consume(BinaryStringData.fromBytes(newString));
    }

    @Benchmark
    public void useBinaryStringDataUtils(Blackhole blackhole) throws Exception {
        blackhole.consume(BinaryStringDataUtil.concat(str, BinaryStringData.blankString(sizeToPad)));
    }
}