8370227: Migrate micros-javac benchmarks from jmh-jdk-microbenchmarks

.gitignore

@@ -25,3 +25,4 @@ NashornProfile.txt
 **/core.[0-9]*
 *.rej
 *.orig
+test/benchmarks/**/target

test/benchmarks/micros-javac/README.md

@@ -0,0 +1,61 @@
+# Javac microbenchmarks
+
+The Javac Microbenchmarks is a collection of microbenchmarks for measuring
+the performance of Javac API using the
+[JMH](http://openjdk.java.net/projects/code-tools/jmh/) framework.
+
+
+## Building and running the project
+
+Currently, the project can be built and run with JDK 9 and later. This is
+a Maven project and is built by:
+
+    $ mvn clean install
+
+After building, the executable jar is target/micros-javac-[version].jar.
+Run the benchmarks with:
+
+    $ java -jar target/micros-javac-*.jar [optional jmh parameters]
+
+See the entire list of benchmarks using:
+
+    $ java -jar target/micros-javacs-*.jar -l [optional regex to select benchmarks]
+
+For example:
+
+    $ java -jar target/micros-javac-1.0-SNAPSHOT.jar -l
+    Benchmarks:
+    org.openjdk.bench.langtools.javac.GroupJavacBenchmark.coldGroup
+    org.openjdk.bench.langtools.javac.GroupJavacBenchmark.hotGroup
+    org.openjdk.bench.langtools.javac.SingleJavacBenchmark.compileCold
+    org.openjdk.bench.langtools.javac.SingleJavacBenchmark.compileHot
+
+And the same regex syntax works to run some test:
+
+    $ java -jar target/micros-javac-1.0-SNAPSHOT.jar SingleJavacBenchmark.compileHot
+
+## Troubleshooting
+
+### Build of micros-javac module got stuck
+
+If you build got stuck on `[get] Getting: https://download.java.net/openjdk/jdk11/ri/openjdk-11+28_windows-x64_bin.zip` then you are probably experiencing some networking or web proxy obstacles.
+
+One solution is to download required reference JDK from [https://download.java.net/openjdk/jdk11/ri/openjdk-11+28_windows-x64_bin.zip](https://download.java.net/openjdk/jdk11/ri/openjdk-11+28_windows-x64_bin.zip) manually and then build the project with property pointing to the local copy:
+
+    $ mvn clean install -Djavac.benchmark.openjdk.zip.download.url=file:///<your download location>/openjdk-11+28_windows-x64_bin.zip
+
+Note: Please use `openjdk-11+28_windows-x64_bin.zip` to build the project no matter what target platform is.
+
+Another solution might be to add proxy settings:
+
+    $ mvn -Dhttps.proxyHost=... -Dhttps.proxyPort=... clean install
+
+### Execution of micros-javac benchmarks takes several hours
+
+micros-javac benchmarks consist of two sets of benchmarks:
+ * `SingleJavacBenchmark` (which is parametrized) measures each single javac compilation stage in an isolated run. This benchmark is designed for exact automated performance regression testing and it takes several hours to execute completely.
+ * `GroupJavacBenchmark` is grouping the measurements of all javac compilation stages into one run and its execution should take less than 30 minutes on a regular developers computer.
+
+Solution to speed up javac benchmarking is to select only `GroupJavacBenchmark` for execution using following command line:
+
+    $ java -jar target/micros-javac-1.0-SNAPSHOT.jar .*GroupJavacBenchmark.*

test/benchmarks/micros-javac/pom.xml

@@ -0,0 +1,139 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <!--
+     Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
+     DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+
+     This code is free software; you can redistribute it and/or modify it
+     under the terms of the GNU General Public License version 2 only, as
+     published by the Free Software Foundation.
+
+     This code is distributed in the hope that it will be useful, but WITHOUT
+     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+     version 2 for more details (a copy is included in the LICENSE file that
+     accompanied this code).
+
+     You should have received a copy of the GNU General Public License version
+     2 along with this work; if not, write to the Free Software Foundation,
+     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+
+     Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+     or visit www.oracle.com if you need additional information or have any
+     questions.
+    -->
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>org.openjdk</groupId>
+    <artifactId>micros-javac</artifactId>
+    <packaging>jar</packaging>
+    <version>1.0-SNAPSHOT</version>
+    <name>OpenJDK Microbenchmark of Java Compile</name>
+    <properties>
+        <javac.benchmark.openjdk.zip.download.url>https://download.java.net/openjdk/jdk11/ri/openjdk-11+28_windows-x64_bin.zip</javac.benchmark.openjdk.zip.download.url>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <jmh.version>1.36</jmh.version>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.6.1</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <transformers>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <mainClass>org.openjdk.jmh.Main</mainClass>
+                                </transformer>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
+                                    <resource>META-INF/BenchmarkList</resource>
+                                </transformer>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
+                                    <resource>META-INF/CompilerHints</resource>
+                                </transformer>
+                            </transformers>
+                            <createDependencyReducedPom>false</createDependencyReducedPom>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.14.1</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                    <annotationProcessorPaths>
+                        <path>
+                            <groupId>org.openjdk.jmh</groupId>
+                            <artifactId>jmh-generator-annprocess</artifactId>
+                            <version>${jmh.version}</version>
+                        </path>
+                    </annotationProcessorPaths>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-release-plugin</artifactId>
+                <version>3.1.1</version>
+            </plugin>
+            <plugin>
+                <artifactId>maven-deploy-plugin</artifactId>
+                <version>3.1.4</version>
+            </plugin>
+            <plugin>
+                <artifactId>maven-antrun-plugin</artifactId>
+                <version>3.1.0</version>
+                <executions>
+                    <execution>
+                        <phase>process-resources</phase>
+                        <configuration>
+                            <target>
+                                <mkdir dir="${project.build.outputDirectory}"/>
+                                <get src="${javac.benchmark.openjdk.zip.download.url}" dest="${project.build.directory}/jdk-bin.zip" skipexisting="true" verbose="true"/>
+                                <unzip src="${project.build.directory}/jdk-bin.zip" dest="${project.build.outputDirectory}">
+                                    <patternset>
+                                        <include name="*/lib/src.zip"/>
+                                        <include name="*/release"/>
+                                    </patternset>
+                                    <mapper type="flatten"/>
+                                </unzip>
+                                <loadfile srcFile="${project.build.outputDirectory}/release" property="release.info"/>
+                                <echo>
+-------------------------------------------------
+Bundling JDK sources with following release info:
+-------------------------------------------------
+${release.info}
+-------------------------------------------------
+                                </echo>
+                            </target>
+                        </configuration>
+                        <goals>
+                            <goal>run</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>${jmh.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-generator-annprocess</artifactId>
+            <version>${jmh.version}</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+</project>