chore: improve runtime performance of derived signals (#13626)

trueadm · web-flow · commit 7429854383f9 · 2024-10-16T09:01:17.000-04:00
diff --git a/.changeset/shiny-jobs-judge.md b/.changeset/shiny-jobs-judge.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+chore: improve runtime performance of derived signals
diff --git a/packages/svelte/src/internal/client/runtime.js b/packages/svelte/src/internal/client/runtime.js
@@ -801,7 +801,7 @@ export function get(signal) {
 			set_signal_status(active_effect, DIRTY);
 			schedule_effect(active_effect);
 		}
-	} else if (is_derived) {
+	} else if (is_derived && /** @type {Derived} */ (signal).deps === null) {
 		var derived = /** @type {Derived} */ (signal);
 		var parent = derived.parent;
 

-Original file line number
+Diff line change
@@ @@ -0,0 +1,5 @@ @@
 +---
 +'svelte': patch
 +---
++
 +chore: improve runtime performance of derived signals
Original file line number	Diff line number	Diff line change
`@@ -801,7 +801,7 @@ export function get(signal) {`
`801`	`801`	`set_signal_status(active_effect, DIRTY);`
`802`	`802`	`schedule_effect(active_effect);`
`803`	`803`	`}`
`804`		`- } else if (is_derived) {`
	`804`	`+ } else if (is_derived && /** @type {Derived} */ (signal).deps === null) {`
`805`	`805`	`var derived = /** @type {Derived} */ (signal);`
`806`	`806`	`var parent = derived.parent;`
`807`	`807`