Do not waste memory on empty hash maps in annotations

spring-projects · Dec 26, 2022 · 8aa642e · 8aa642e
1 parent 32e1a64
commit 8aa642e
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/.../main/java/org/springframework/core/type/classreading/MergedAnnotationReadingVisitor.java b/.../main/java/org/springframework/core/type/classreading/MergedAnnotationReadingVisitor.java
@@ -91,9 +91,11 @@ public AnnotationVisitor visitArray(String name) {
 	}
 
 	@Override
-	public void visitEnd() {
+	public void visitEnd() {M
+		Map<String, Object> compactedAttributes
+				= this.attributes.size() == 0 ? Map.of() : this.attributes;
 		MergedAnnotation<A> annotation = MergedAnnotation.of(
-				this.classLoader, this.source, this.annotationType, this.attributes);
+				this.classLoader, this.source, this.annotationType, compactedAttributes);
 		this.consumer.accept(annotation);
 	}