PerfInternCache.java

package perf;

import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Threads;
import org.openjdk.jmh.annotations.Warmup;
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 java.io.IOException;
import java.util.concurrent.TimeUnit;

/**
 * @author vladimir.dolzhenko@gmail.com
 * @since 2016-11-12
 */
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@Fork(1)
@Warmup(iterations = 2, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 2, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
@Threads(1)
public class PerfInternCache {
	@State(Scope.Benchmark)
	public static class BenchmarkState {
		final String json;

		public BenchmarkState() {
			StringBuilder builder = new StringBuilder("{");
			for(int i = 0; i < 10000; i++){
				if (i > 0) {
					builder.append(", \n");
				}
				builder.append('"')
						.append("someQName")
						.append(i)
						.append("\": ")
						.append(i);
			}
			builder.append("}");
			json = builder.toString();
		}
	}

	@Benchmark
	public void parseJson(BenchmarkState state, Blackhole bh) throws IOException {
		final JsonFactory factory = new JsonFactory();
		JsonParser parser = factory.createParser(state.json);
		while (parser.nextValue() != null) {
			JsonToken x = parser.currentToken();
			bh.consume(x);
		}
	}

	public static void main(String[] args) throws RunnerException {
		Options opt = new OptionsBuilder()
				.include(PerfInternCache.class.getSimpleName())
				.warmupIterations(5)
				.measurementIterations(5)
				.build();

		new Runner(opt).run();
	}
}