Polishing.

Add dynamic projection benchmark.

Author: mp911de

pom.xml

@@ -56,17 +56,9 @@
 	<profiles>
 		<profile>
 			<id>jmh</id>
-			<dependencies>
-				<dependency>
-					<groupId>com.github.mp911de.microbenchmark-runner</groupId>
-					<artifactId>microbenchmark-runner-junit5</artifactId>
-					<version>0.4.0.RELEASE</version>
-					<scope>test</scope>
-				</dependency>
-			</dependencies>
 			<repositories>
 				<repository>
-					<id>jitpack.io</id>
+					<id>jitpack</id>
 					<url>https://jitpack.io</url>
 				</repository>
 			</repositories>

spring-data-jpa/src/jmh/java/org/springframework/data/jpa/benchmark/RepositoryQueryMethodBenchmarks.java

@@ -42,6 +42,7 @@
 
 import org.springframework.data.domain.Sort;
 import org.springframework.data.jpa.benchmark.model.Person;
+import org.springframework.data.jpa.benchmark.model.PersonDto;
 import org.springframework.data.jpa.benchmark.model.Profile;
 import org.springframework.data.jpa.benchmark.repository.PersonRepository;
 import org.springframework.data.jpa.repository.support.JpaRepositoryFactory;
@@ -195,6 +196,12 @@ public List<Person> stringBasedQueryDynamicSort(BenchmarkParameters parameters)
 				Sort.by(COLUMN_PERSON_FIRSTNAME));
 	}
 
+	@Benchmark
+	public List<PersonDto> stringBasedQueryDynamicSortAndProjection(BenchmarkParameters parameters) {
+		return parameters.repositoryProxy.findAllWithAnnotatedQueryByFirstname(PERSON_FIRSTNAME,
+				Sort.by(COLUMN_PERSON_FIRSTNAME), PersonDto.class);
+	}
+
 	@Benchmark
 	public List<Person> stringBasedNativeQuery(BenchmarkParameters parameters) {
 		return parameters.repositoryProxy.findAllWithNativeQueryByFirstname(PERSON_FIRSTNAME);

spring-data-jpa/src/jmh/java/org/springframework/data/jpa/benchmark/model/PersonDto.java

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2025 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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.springframework.data.jpa.benchmark.model;
+
+/**
+ * @author Mark Paluch
+ */
+public record PersonDto(String firstname, String lastname) {
+}

spring-data-jpa/src/jmh/java/org/springframework/data/jpa/benchmark/repository/PersonRepository.java

@@ -38,6 +38,9 @@ public interface PersonRepository extends ListCrudRepository<Person, Integer> {
 	@Query("SELECT p FROM org.springframework.data.jpa.benchmark.model.Person p WHERE p.firstname = ?1")
 	List<Person> findAllWithAnnotatedQueryByFirstname(String firstname, Sort sort);
 
+	@Query("SELECT p FROM org.springframework.data.jpa.benchmark.model.Person p WHERE p.firstname = ?1")
+	<T> List<T> findAllWithAnnotatedQueryByFirstname(String firstname, Sort sort, Class<T> projection);
+
 	@Query(value = "SELECT * FROM person WHERE firstname = ?1", nativeQuery = true)
 	List<Person> findAllWithNativeQueryByFirstname(String firstname);