Introduce AggregatePath benchmark.

See #1679

spring-data-relational/src/jmh/java/org/springframework/data/relational/BenchmarkSettings.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2022 the original author or authors.
+ * Copyright 2023 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.
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.data.relational.core.sqlgeneration;
+package org.springframework.data.relational;
 
 import java.util.concurrent.TimeUnit;
 

spring-data-relational/src/jmh/java/org/springframework/data/relational/core/mapping/AggregatePathBenchmark.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2023 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.relational.core.mapping;
+
+import java.util.List;
+
+import org.junit.platform.commons.annotation.Testable;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.relational.BenchmarkSettings;
+
+/**
+ * @author Mark Paluch
+ */
+@Testable
+public class AggregatePathBenchmark extends BenchmarkSettings {
+
+	@Benchmark
+	public Object measureAggregatePathAppend(StateHolder holder) {
+
+		holder.context.getAggregatePath(holder.persistentEntity)
+				.append(holder.persistentEntity.getRequiredPersistentProperty("id"));
+		holder.context.getAggregatePath(holder.persistentEntity)
+				.append(holder.persistentEntity.getRequiredPersistentProperty("name"));
+		return holder.context.getAggregatePath(holder.persistentEntity)
+				.append(holder.persistentEntity.getRequiredPersistentProperty("trivials"));
+	}
+
+	@Benchmark
+	public Object measureGetAggregatePathAppend(StateHolder holder) {
+
+		return holder.context.getAggregatePath(holder.persistentEntity)
+				.append(holder.persistentEntity.getRequiredPersistentProperty("id"));
+	}
+
+	@State(Scope.Benchmark)
+	public static class StateHolder {
+
+		RelationalMappingContext context = new RelationalMappingContext();
+
+		RelationalPersistentEntity<?> persistentEntity;
+
+		@Setup
+		public void setup() {
+			persistentEntity = context.getRequiredPersistentEntity(SingleReferenceAggregate.class);
+		}
+	}
+
+	record TrivialAggregate(@Id Long id, String name) {
+	}
+
+	record SingleReferenceAggregate(@Id Long id, String name, List<TrivialAggregate> trivials) {
+	}
+}

spring-data-relational/src/jmh/java/org/springframework/data/relational/core/sqlgeneration/SingleQuerySqlGeneratorBenchmark.java

@@ -24,6 +24,7 @@ import org.openjdk.jmh.annotations.Scope;
 import org.openjdk.jmh.annotations.Setup;
 import org.openjdk.jmh.annotations.State;
 import org.springframework.data.annotation.Id;
+import org.springframework.data.relational.BenchmarkSettings;
 import org.springframework.data.relational.core.dialect.PostgresDialect;
 import org.springframework.data.relational.core.mapping.RelationalMappingContext;
 import org.springframework.data.relational.core.mapping.RelationalPersistentEntity;