diff --git a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/element.js b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/element.js
index 5b5dc73da1..9143a57025 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/element.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/element.js
@@ -78,17 +78,14 @@ export function build_attribute_effect(
 		);
 	}
 
-	const all = memoizer.apply();
+	const ids = memoizer.apply();
 
 	context.state.init.push(
 		b.stmt(
 			b.call(
 				'$.attribute_effect',
 				element_id,
-				b.arrow(
-					all.map(({ id }) => id),
-					b.object(values)
-				),
+				b.arrow(ids, b.object(values)),
 				memoizer.sync_values(),
 				memoizer.async_values(),
 				element.metadata.scoped &&
diff --git a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/utils.js b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/utils.js
index ebd864ca4a..4716ae1a4c 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/utils.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/utils.js
@@ -12,51 +12,48 @@ import { build_getter } from '../../utils.js';
 
 export class Memoizer {
 	/** @type {Array<{ id: Identifier, expression: Expression }>} */
-	sync = [];
+	#sync = [];
 
 	/** @type {Array<{ id: Identifier, expression: Expression }>} */
-	async = [];
+	#async = [];
 
 	/**
 	 * @param {Expression} expression
 	 * @param {boolean} has_await
 	 */
 	add(expression, has_await) {
-		const id = b.id(`#`); // filled in later
+		const id = b.id('#'); // filled in later
 
-		(has_await ? this.async : this.sync).push({ id, expression });
+		(has_await ? this.#async : this.#sync).push({ id, expression });
 
 		return id;
 	}
 
 	apply() {
-		const all = [...this.async, ...this.sync];
-
-		all.forEach((memo, i) => {
+		return [...this.#async, ...this.#sync].map((memo, i) => {
 			memo.id.name = `$${i}`;
+			return memo.id;
 		});
-
-		return all;
 	}
 
 	deriveds(runes = true) {
-		return this.sync.map((memo) =>
+		return this.#sync.map((memo) =>
 			b.let(memo.id, b.call(runes ? '$.derived' : '$.derived_safe_equal', b.thunk(memo.expression)))
 		);
 	}
 
 	async_ids() {
-		return this.async.map((memo) => memo.id);
+		return this.#async.map((memo) => memo.id);
 	}
 
 	async_values() {
-		if (this.async.length === 0) return;
-		return b.array(this.async.map((memo) => b.thunk(memo.expression, true)));
+		if (this.#async.length === 0) return;
+		return b.array(this.#async.map((memo) => b.thunk(memo.expression, true)));
 	}
 
 	sync_values() {
-		if (this.sync.length === 0) return;
-		return b.array(this.sync.map((memo) => b.thunk(memo.expression)));
+		if (this.#sync.length === 0) return;
+		return b.array(this.#sync.map((memo) => b.thunk(memo.expression)));
 	}
 }
 
@@ -163,13 +160,13 @@ export function build_template_chunk(
 export function build_render_statement(state) {
 	const { memoizer } = state;
 
-	const all = state.memoizer.apply();
+	const ids = state.memoizer.apply();
 
 	return b.stmt(
 		b.call(
 			'$.template_effect',
 			b.arrow(
-				all.map(({ id }) => id),
+				ids,
 				state.update.length === 1 && state.update[0].type === 'ExpressionStatement'
 					? state.update[0].expression
 					: b.block(state.update)