zabetak commented on code in PR #3853: URL: https://github.com/apache/calcite/pull/3853#discussion_r1677728020
########## ubenchmark/src/jmh/java/org/apache/calcite/benchmarks/ParserInstantiationBenchmark.java: ########## @@ -0,0 +1,115 @@ +/* + * 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 java.util.concurrent.TimeUnit; + +import org.apache.calcite.sql.parser.SqlParseException; +import org.apache.calcite.sql.parser.SqlParser; +import org.apache.calcite.sql.parser.babel.SqlBabelParserImpl; + +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.Setup; +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.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; + +/** + * Benchmarks JavaCC-generated SqlBabelParserImpl and ImmutableSqlParser instantiation. + * The instantiation time of parsers should not depend on the call stack depth. + * See https://lists.apache.org/thread/xw35sdy1w1k8lvn1q1lr7xb93bkj0lpq + */ +@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 ParserInstantiationBenchmark { Review Comment: I don't have a strong preference so let's keep it as is. ########## ubenchmark/src/jmh/java/org/apache/calcite/benchmarks/ParserInstantiationBenchmark.java: ########## @@ -0,0 +1,115 @@ +/* + * 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 java.util.concurrent.TimeUnit; + +import org.apache.calcite.sql.parser.SqlParseException; +import org.apache.calcite.sql.parser.SqlParser; +import org.apache.calcite.sql.parser.babel.SqlBabelParserImpl; + +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.Setup; +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.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; + +/** + * Benchmarks JavaCC-generated SqlBabelParserImpl and ImmutableSqlParser instantiation. + * The instantiation time of parsers should not depend on the call stack depth. + * See https://lists.apache.org/thread/xw35sdy1w1k8lvn1q1lr7xb93bkj0lpq + */ +@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 ParserInstantiationBenchmark { + + int callStackDepth; + SqlParser.Config babelConfig; + SqlParser.Config coreConfig; + String sqlExpression; + + @Setup + public void setup() throws SqlParseException { + babelConfig = SqlParser.config().withParserFactory(SqlBabelParserImpl.FACTORY); + coreConfig = SqlParser.config(); + // not important in this benchmark, see ParserBenchmark for varying string length + sqlExpression = "SELECT 1"; + callStackDepth = 100; + } + + @Benchmark + public void instantiateBabelParser(Blackhole bh) { Review Comment: If there is interest in keeping the additional benchmark then that's fine with me! -- This is an automated message from the Apache Git Service. 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