chore: more tweaks to each block performance

Author: trueadm

packages/svelte/src/internal/client/dom/blocks/each.js

@@ -57,9 +57,9 @@ export function index(_, i) {
  * subsequent destruction. Used in each blocks
  * @param {import('#client').EachItem[]} items
  * @param {null | Node} controlled_anchor
- * @param {() => void} [callback]
+ * @param {Map<any, import("#client").EachItem>} items_map
  */
-function pause_effects(items, controlled_anchor, callback) {
+function pause_effects(items, controlled_anchor, items_map) {
 	/** @type {import('#client').TransitionManager[]} */
 	var transitions = [];
 	var length = items.length;
@@ -81,10 +81,11 @@ function pause_effects(items, controlled_anchor, callback) {
 
 	run_out_transitions(transitions, () => {
 		for (var i = 0; i < length; i++) {
-			destroy_effect(items[i].e, !is_controlled);
+			var item = items[i];
+			items_map.delete(item.k);
+			link(item.prev, item.next);
+			destroy_effect(item.e, !is_controlled);
 		}
-
-		if (callback !== undefined) callback();
 	});
 }
 
@@ -413,6 +414,7 @@ function reconcile(array, state, anchor, render_fn, flags, get_key) {
 			}
 		}
 
+<<<<<<< Updated upstream
 		pause_effects(to_destroy, controlled_anchor, () => {
 			for (var i = 0; i < destroy_length; i += 1) {
 				var item = to_destroy[i];
@@ -421,6 +423,9 @@ function reconcile(array, state, anchor, render_fn, flags, get_key) {
 				link(item.prev, item.next);
 			}
 		});
+=======
+		pause_effects(to_destroy, controlled_anchor, items);
+>>>>>>> Stashed changes
 	}
 
 	if (is_animated) {