From 11aa510de1436226927aaca84fe61cf798e5e0a8 Mon Sep 17 00:00:00 2001
From: Brian Takita <brian.takita@gmail.com>
Date: Thu, 11 Jul 2019 03:42:54 -0400
Subject: [PATCH] Optimization: Single for loop instead of 2 forEach loops

---
 src/runtime/store/index.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/runtime/store/index.ts b/src/runtime/store/index.ts
index 98761b847f..7f94351437 100644
--- a/src/runtime/store/index.ts
+++ b/src/runtime/store/index.ts
@@ -70,9 +70,12 @@ export function writable<T>(value: T, start: StartStopNotifier<T> = noop): Writa
 		if (safe_not_equal(value, new_value)) {
 			value = new_value;
 			if (stop) { // store is ready
-				subscribers.forEach((s) => s[1]());
 				const run_queue = !subscriber_queue.length;
-				subscribers.forEach(s => subscriber_queue.push(s, value));
+				for (let i = 0; i < subscribers.length; i++) {
+					const s = subscribers[i];
+					s[1]();
+					subscriber_queue.push(s, value);
+				}
 				if (run_queue) {
 					let s;
 					while (s = subscriber_queue.shift()) {