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      1 /*
      2  * Copyright 2017 The gRPC Authors
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package io.grpc;
     18 
     19 
     20 import java.util.concurrent.TimeUnit;
     21 import org.openjdk.jmh.annotations.Benchmark;
     22 import org.openjdk.jmh.annotations.BenchmarkMode;
     23 import org.openjdk.jmh.annotations.Mode;
     24 import org.openjdk.jmh.annotations.OutputTimeUnit;
     25 import org.openjdk.jmh.annotations.Param;
     26 import org.openjdk.jmh.annotations.Scope;
     27 import org.openjdk.jmh.annotations.Setup;
     28 import org.openjdk.jmh.annotations.State;
     29 
     30 /**
     31  * Javadoc.
     32  */
     33 @State(Scope.Benchmark)
     34 public class AttributesBenchmark {
     35 
     36   public Attributes base = Attributes.EMPTY;
     37 
     38   public Attributes.Key<Object>[] keys;
     39   public Attributes withValue = base;
     40 
     41   /**
     42    * Javadoc.
     43    */
     44   @Setup
     45   @SuppressWarnings({"unchecked", "rawtypes"})
     46   public void setUp() {
     47     keys = new Attributes.Key[iterations];
     48     for (int i = 0; i < iterations; i++) {
     49       keys[i] = Attributes.Key.create("any");
     50       withValue = withValue.toBuilder().set(keys[i], "yes").build();
     51     }
     52   }
     53 
     54   @Param({"1", "2", "10"})
     55   public int iterations;
     56 
     57   /**
     58    * Javadoc.
     59    */
     60   @Benchmark
     61   @BenchmarkMode(Mode.SampleTime)
     62   @OutputTimeUnit(TimeUnit.NANOSECONDS)
     63   public Attributes chain() {
     64     Attributes attr = base;
     65     for (int i = 0; i < iterations; i++) {
     66       attr = attr.toBuilder().set(keys[i], new Object()).build();
     67     }
     68     return attr;
     69   }
     70 
     71   /**
     72    * Javadoc.
     73    */
     74   @Benchmark
     75   @BenchmarkMode(Mode.SampleTime)
     76   @OutputTimeUnit(TimeUnit.NANOSECONDS)
     77   public Object lookup() {
     78     return withValue.get(keys[0]);
     79   }
     80 }
     81