/*
    * Copyright 2017 The Netty Project
    *
    * The Netty Project 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:
    *
    *   https://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 io.netty5.handler.codec.http;
  
  import io.netty5.buffer.api.Buffer;
  import io.netty5.buffer.api.BufferAllocator;
  import io.netty5.microbench.util.AbstractMicrobenchmark;
  import org.openjdk.jmh.annotations.Benchmark;
  import org.openjdk.jmh.annotations.Measurement;
  import org.openjdk.jmh.annotations.OutputTimeUnit;
  import org.openjdk.jmh.annotations.Threads;
  import org.openjdk.jmh.annotations.Warmup;
  
  import java.util.concurrent.TimeUnit;
  
  import static io.netty5.handler.codec.http.HttpConstants.CR;
  import static io.netty5.handler.codec.http.HttpConstants.LF;
  
  @Threads(1)
  @Warmup(iterations = 3)
  @Measurement(iterations = 3)
  @OutputTimeUnit(TimeUnit.MICROSECONDS)
  public class WriteBytesVsShortOrMediumBenchmark extends AbstractMicrobenchmark {
      private static final short CRLF_SHORT = (CR << 8) + LF;
      private static final byte[] CRLF = { CR, LF };
      private static final int ZERO_CRLF_MEDIUM = ('0' << 16) + (CR << 8) + LF;
      private static final byte[] ZERO_CRLF = { '0', CR, LF };
  
      private final Buffer buf = BufferAllocator.offHeapUnpooled().allocate(16);
  
      @Benchmark
      public Buffer shortInt() {
          return buf.writeShort(CRLF_SHORT).writerOffset(0);
      }
  
      @Benchmark
      public Buffer mediumInt() {
          return buf.writeMedium(ZERO_CRLF_MEDIUM).writerOffset(0);
      }
  
      @Benchmark
      public Buffer byteArray2() {
          return buf.writeBytes(CRLF).writerOffset(0);
      }
  
      @Benchmark
      public Buffer byteArray3() {
          return buf.writeBytes(ZERO_CRLF).writerOffset(0);
      }
  
      @Benchmark
      public Buffer chainedBytes2() {
          return buf.writeByte(CR).writeByte(LF).writerOffset(0);
      }
  
      @Benchmark
      public Buffer chainedBytes3() {
          return buf.writeByte((byte) '0').writeByte(CR).writeByte(LF).writerOffset(0);
      }
  }