optimise

Rich-Harris · Rich-Harris · commit 99ecd98813ff · 2024-04-10T12:10:33.000-04:00
diff --git a/packages/svelte/src/internal/client/dom/blocks/each.js b/packages/svelte/src/internal/client/dom/blocks/each.js
@@ -371,13 +371,13 @@ function reconcile(array, state, anchor, render_fn, flags, get_key) {
 		current = item.next;
 	}
 
+	const to_destroy = Array.from(seen);
+
 	while (current) {
-		seen.add(current);
+		to_destroy.push(current);
 		current = current.next;
 	}
 
-	const to_destroy = Array.from(seen);
-
 	var controlled_anchor = (flags & EACH_IS_CONTROLLED) !== 0 && length === 0 ? anchor : null;
 
 	pause_effects(to_destroy, controlled_anchor, () => {

Original file line number	Diff line number	Diff line change
`@@ -371,13 +371,13 @@ function reconcile(array, state, anchor, render_fn, flags, get_key) {`
`371`	`371`	`current = item.next;`
`372`	`372`	`}`
`373`	`373`
	`374`	`+ const to_destroy = Array.from(seen);`
	`375`	`+`
`374`	`376`	`while (current) {`
`375`		`- seen.add(current);`
	`377`	`+ to_destroy.push(current);`
`376`	`378`	`current = current.next;`
`377`	`379`	`}`
`378`	`380`
`379`		`- const to_destroy = Array.from(seen);`
`380`		`-`
`381`	`381`	`var controlled_anchor = (flags & EACH_IS_CONTROLLED) !== 0 && length === 0 ? anchor : null;`
`382`	`382`
`383`	`383`	`pause_effects(to_destroy, controlled_anchor, () => {`