fix: cleanup array prototype monkeypatching (#11634)

* fix: cleanup array prototype monkeypatching

* Update packages/svelte/src/internal/client/dev/equality.js

---------

Co-authored-by: Simon H <[email protected]>

Author: trueadm

packages/svelte/src/internal/client/dev/equality.js

@@ -3,6 +3,14 @@ import { get_proxied_value } from '../proxy.js';
 
 export function init_array_prototype_warnings() {
 	const array_prototype = Array.prototype;
+	// The REPL ends up here over and over, and this prevents it from adding more and more patches
+	// of the same kind to the prototype, which would slow down everything over time.
+	// @ts-expect-error
+	const cleanup = Array.__svelte_cleanup;
+	if (cleanup) {
+		cleanup();
+	}
+
 	const { indexOf, lastIndexOf, includes } = array_prototype;
 
 	array_prototype.indexOf = function (item, from_index) {
@@ -55,6 +63,13 @@ export function init_array_prototype_warnings() {
 
 		return has;
 	};
+
+	// @ts-expect-error
+	Array.__svelte_cleanup = () => {
+		array_prototype.indexOf = indexOf;
+		array_prototype.lastIndexOf = lastIndexOf;
+		array_prototype.includes = includes;
+	};
 }
 
 /**