DummyParserBenchmark.java

package sample;

import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import org.openjdk.jmh.annotations.*;

import java.io.IOException;

public class DummyParserBenchmark {
    @GenerateMicroBenchmark
    public void measureSax_pre_check(Json json) throws IOException {
        json.parser.nextToken();
        JsonToken token;

        while ((token = json.parser.nextToken()) != null) {
            if (token != JsonToken.FIELD_NAME) {
                break;
            }
            json.parser.nextToken();
        }
    }

    @GenerateMicroBenchmark
    public void measureSax_post_check(Json json) throws IOException {
        json.parser.nextToken();
        JsonToken token;

        while ((token = json.parser.nextToken()) != null) {
            json.parser.nextToken();
            if (token != JsonToken.FIELD_NAME) {
                break;
            }
        }
    }

    @State(Scope.Thread)
    public static class Json {
        private static final String JSON = "{\"key\":\"value\"}";

        private JsonParser parser;

        @Setup(Level.Invocation)
        public void init() throws IOException {
            parser = new JsonFactory().createParser(JSON);
        }
    }

}

results.txt

$ java -jar microbenchmarks.jar ".*Parser.*" -bm avgt -tu us

Benchmark                                        Mode   Samples         Mean   Mean error    Units
s.DummyParserBenchmark.measureSax_post_check     avgt       200        0.509        0.005    us/op
s.DummyParserBenchmark.measureSax_pre_check      avgt       200        0.748        0.007    us/op

versions.gradle

dependencies {
  perfCompile 'org.openjdk.jmh:jmh-core:0.5.3'
  perfCompile 'org.openjdk.jmh:jmh-generator-annprocess:0.5.3'
  perfCompile 'com.fasterxml.jackson.core:jackson-core:2.3.2'
  perfCompile 'com.fasterxml.jackson.core:jackson-databind:2.3.2'
}