Relocate benchmarks to core module.

Original Pull Request: #4819

Author: mp911de

pom.xml

@@ -125,12 +125,13 @@
 
 	<profiles>
 		<profile>
-			<id>benchmarks</id>
-			<modules>
-				<module>spring-data-mongodb</module>
-				<module>spring-data-mongodb-distribution</module>
-				<module>spring-data-mongodb-benchmarks</module>
-			</modules>
+			<id>jmh</id>
+			<repositories>
+				<repository>
+					<id>jitpack.io</id>
+					<url>https://jitpack.io</url>
+				</repository>
+			</repositories>
 		</profile>
 		<profile>
 			<id>mongo-4.x</id>

spring-data-mongodb-benchmarks/README.md

@@ -343,6 +343,21 @@
 
 		<plugins>
 
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<configuration>
+					<annotationProcessorPaths>
+						<path>
+							<groupId>org.openjdk.jmh</groupId>
+							<artifactId>jmh-generator-annprocess</artifactId>
+							<version>${jmh}</version>
+						</path>
+					</annotationProcessorPaths>
+
+				</configuration>
+			</plugin>
+
 			<plugin>
 				<groupId>com.mysema.maven</groupId>
 				<artifactId>apt-maven-plugin</artifactId>

spring-data-mongodb-benchmarks/pom.xml

@@ -49,7 +49,7 @@ public class AbstractMicrobenchmark {
 
 	static final int WARMUP_ITERATIONS = 5;
 	static final int MEASUREMENT_ITERATIONS = 10;
-	static final int FORKS = 0;
+	static final int FORKS = 1;
 	static final String[] JVM_ARGS = { "-server", "-XX:+HeapDumpOnOutOfMemoryError", "-Xms1024m", "-Xmx1024m",
 			"-XX:MaxDirectMemorySize=1024m" };