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   /*
    * Copyright 2019 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.netty.handler.codec.http;
  
  import io.netty.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.Setup;
  import org.openjdk.jmh.annotations.Threads;
  import org.openjdk.jmh.annotations.Warmup;
  
  import java.util.concurrent.TimeUnit;
  
  @Threads(1)
  @Warmup(iterations = 3)
  @Measurement(iterations = 3)
  @OutputTimeUnit(TimeUnit.MICROSECONDS)
  public class QueryStringEncoderBenchmark extends AbstractMicrobenchmark {
      private String shortAscii;
      private String shortUtf8;
      private String shortAsciiFirst;
  
      private String longAscii;
      private String longUtf8;
      private String longAsciiFirst;
  
      @Setup
      public void setUp() {
          // Avoid constant pool for strings since it's common for at least values to not be constant.
          shortAscii = new String("foo".toCharArray());
          shortUtf8 = new String("ほげほげ".toCharArray());
          shortAsciiFirst = shortAscii + shortUtf8;
          longAscii = repeat(shortAscii, 100);
          longUtf8 = repeat(shortUtf8, 100);
          longAsciiFirst = longAscii + longUtf8;
      }
  
      @Benchmark
      public String shortAscii() {
          return encode(shortAscii);
      }
  
      @Benchmark
      public String shortUtf8() {
          return encode(shortUtf8);
      }
  
      @Benchmark
      public String shortAsciiFirst() {
          return encode(shortAsciiFirst);
      }
  
      @Benchmark
      public String longAscii() {
          return encode(longAscii);
      }
  
      @Benchmark
      public String longUtf8() {
          return encode(longUtf8);
      }
  
      @Benchmark
      public String longAsciiFirst() {
          return encode(longAsciiFirst);
      }
  
      private static String encode(String s) {
          QueryStringEncoder encoder = new QueryStringEncoder("");
          encoder.addParam(s, s);
          return encoder.toString();
      }
  
      private static String repeat(String s, int num) {
          StringBuilder sb = new StringBuilder(num * s.length());
          for (int i = 0; i < num; i++) {
              sb.append(s);
          }
          return sb.toString();
      }
  }