Add JMH to POM to factlitate performance testing and avoid future and

current PRs to clash in the POM.

Author: Gary Gregory

pom.xml

@@ -271,6 +271,18 @@ file comparators, endian transformation classes, and much more.
       <version>3.11</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.openjdk.jmh</groupId>
+      <artifactId>jmh-core</artifactId>
+      <version>${jmh.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.openjdk.jmh</groupId>
+      <artifactId>jmh-generator-annprocess</artifactId>
+      <version>${jmh.version}</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <properties>
@@ -306,7 +318,8 @@ file comparators, endian transformation classes, and much more.
     <commons.surefire.version>3.0.0-M5</commons.surefire.version>
     <commons.japicmp.version>0.15.2</commons.japicmp.version>
     <spotbugs.plugin.version>4.2.0</spotbugs.plugin.version>
-    <spotbugs.impl.version>4.2.0</spotbugs.impl.version>    
+    <spotbugs.impl.version>4.2.0</spotbugs.impl.version>
+    <jmh.version>1.27</jmh.version>    
     <japicmp.skip>false</japicmp.skip>
     <jacoco.skip>${env.JACOCO_SKIP}</jacoco.skip>
     <commons.release.isDistModule>true</commons.release.isDistModule>
@@ -549,5 +562,44 @@ file comparators, endian transformation classes, and much more.
         <coveralls.skip>true</coveralls.skip>
       </properties>
     </profile>
+    <profile>
+      <id>benchmark</id>
+      <properties>
+        <skipTests>true</skipTests>
+        <benchmark>org.apache</benchmark>
+      </properties>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.codehaus.mojo</groupId>
+            <artifactId>exec-maven-plugin</artifactId>
+            <version>3.0.0</version>
+            <executions>
+              <execution>
+                <id>benchmark</id>
+                <phase>test</phase>
+                <goals>
+                  <goal>exec</goal>
+                </goals>
+                <configuration>
+                  <classpathScope>test</classpathScope>
+                  <executable>java</executable>
+                  <arguments>
+                    <argument>-classpath</argument>
+                    <classpath/>
+                    <argument>org.openjdk.jmh.Main</argument>
+                    <argument>-rf</argument>
+                    <argument>json</argument>
+                    <argument>-rff</argument>
+                    <argument>target/jmh-result.${benchmark}.json</argument>
+                    <argument>${benchmark}</argument>
+                  </arguments>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
   </profiles>
 </project>