Micro-optimization to try to right size the array

ryanrupp · rwinch · commit 53d1ed29b688 · 2025-04-22T10:50:58.000-05:00
diff --git a/spring-session-jdbc/src/main/java/org/springframework/session/jdbc/JdbcIndexedSessionRepository.java b/spring-session-jdbc/src/main/java/org/springframework/session/jdbc/JdbcIndexedSessionRepository.java
@@ -907,7 +907,7 @@ private void save() {
 				});
 			}
 			else {
-				List<Runnable> deltaActions = new ArrayList<>();
+				List<Runnable> deltaActions = JdbcSession.this.changed ? new ArrayList<>(4) : new ArrayList<>();
 				if (JdbcSession.this.changed) {
 					deltaActions.add(() -> {
 						Map<String, String> indexes = JdbcIndexedSessionRepository.this.indexResolver

Original file line number	Diff line number	Diff line change
`@@ -907,7 +907,7 @@ private void save() {`
`907`	`907`	`});`
`908`	`908`	`}`
`909`	`909`	`else {`
`910`		`- List<Runnable> deltaActions = new ArrayList<>();`
	`910`	`+ List<Runnable> deltaActions = JdbcSession.this.changed ? new ArrayList<>(4) : new ArrayList<>();`
`911`	`911`	`if (JdbcSession.this.changed) {`
`912`	`912`	`deltaActions.add(() -> {`
`913`	`913`	`Map<String, String> indexes = JdbcIndexedSessionRepository.this.indexResolver`