fix: improve unowned derived performance (#14724)

* fix: improve unowned derived performance * fix: improve unowned derived performance * changeset
9 months ago · 699dc6e4f7
parent bbf38291fc
commit 699dc6e4f7
2 changed files with 8 additions and 2 deletions
--- a/.changeset/many-worms-attend.md
+++ b/.changeset/many-worms-attend.md
@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: improve unowned derived performance
--- a/packages/svelte/src/internal/client/runtime.js
+++ b/packages/svelte/src/internal/client/runtime.js
@ -230,8 +230,9 @@ export function check_dirtiness(reaction) {
 			}
 		}

-		// Unowned signals should never be marked as clean.
-		if (!is_unowned) {
+		// Unowned signals should never be marked as clean unless they
+		// are used within an active_effect without skip_reaction
+		if (!is_unowned || (active_effect !== null && !skip_reaction)) {
 			set_signal_status(reaction, CLEAN);
 		}
 	}