| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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 |
| * |
| * http://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 org.apache.calcite.benchmarks; |
| |
| import org.apache.calcite.sql.SqlNode; |
| import org.apache.calcite.sql.parser.SqlParseException; |
| import org.apache.calcite.sql.parser.SqlParser; |
| |
| 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.Param; |
| import org.openjdk.jmh.annotations.Scope; |
| import org.openjdk.jmh.annotations.Setup; |
| import org.openjdk.jmh.annotations.State; |
| import org.openjdk.jmh.annotations.Threads; |
| import org.openjdk.jmh.annotations.Warmup; |
| import org.openjdk.jmh.profile.GCProfiler; |
| 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.util.Random; |
| import java.util.concurrent.TimeUnit; |
| |
| /** |
| * Benchmarks JavaCC-generated SQL parser |
| */ |
| @Fork(value = 1, jvmArgsPrepend = "-Xmx128m") |
| @Measurement(iterations = 7, time = 1, timeUnit = TimeUnit.SECONDS) |
| @Warmup(iterations = 7, time = 1, timeUnit = TimeUnit.SECONDS) |
| @State(Scope.Thread) |
| @Threads(1) |
| @BenchmarkMode(Mode.AverageTime) |
| @OutputTimeUnit(TimeUnit.MICROSECONDS) |
| public class ParserBenchmark { |
| |
| @Param({ "1000" }) |
| int length; |
| |
| @Param({ "true" }) |
| boolean comments; |
| |
| String sql; |
| SqlParser parser; |
| |
| @Setup |
| public void setup() throws SqlParseException { |
| StringBuilder sb = new StringBuilder((int) (length * 1.2)); |
| sb.append("select 1"); |
| Random rnd = new Random(); |
| rnd.setSeed(424242); |
| for (; sb.length() < length;) { |
| for (int i = 0; i < 7 && sb.length() < length; i++) { |
| sb.append(", "); |
| switch (rnd.nextInt(3)) { |
| case 0: |
| sb.append("?"); |
| break; |
| case 1: |
| sb.append(rnd.nextInt()); |
| break; |
| case 2: |
| sb.append('\'').append(rnd.nextLong()).append(rnd.nextLong()) |
| .append('\''); |
| break; |
| } |
| } |
| if (comments && sb.length() < length) { |
| sb.append("// sb.append('\\'').append(rnd.nextLong()).append(rnd.nextLong()).append(rnd" |
| + ".nextLong())"); |
| } |
| sb.append('\n'); |
| } |
| sb.append(" from dual"); |
| parser = SqlParser.create("values(1)"); |
| sql = sb.toString(); |
| } |
| |
| @Benchmark |
| public SqlNode parseCached() throws SqlParseException { |
| return parser.parseQuery(sql); |
| } |
| |
| @Benchmark |
| public SqlNode parseNonCached() throws SqlParseException { |
| return SqlParser.create(sql).parseQuery(); |
| } |
| |
| public static void main(String[] args) throws RunnerException { |
| Options opt = new OptionsBuilder() |
| .include(ParserBenchmark.class.getSimpleName()) |
| .addProfiler(GCProfiler.class) |
| .addProfiler(FlightRecorderProfiler.class) |
| .detectJvmArgs() |
| .build(); |
| |
| new Runner(opt).run(); |
| } |
| |
| } |
| |
| // End ParserBenchmark.java |