From e42172add4c608d637e65e050ceb0a321f458813 Mon Sep 17 00:00:00 2001
From: Rich Harris <rich.harris@vercel.com>
Date: Thu, 20 Feb 2025 22:01:03 -0500
Subject: [PATCH] tidy up

---
 .../svelte/src/internal/client/dom/task.js    | 47 +++++++++----------
 .../svelte/src/internal/client/runtime.js     | 12 ++---
 2 files changed, 27 insertions(+), 32 deletions(-)

diff --git a/packages/svelte/src/internal/client/dom/task.js b/packages/svelte/src/internal/client/dom/task.js
index acb5a5b117..fe37d4828f 100644
--- a/packages/svelte/src/internal/client/dom/task.js
+++ b/packages/svelte/src/internal/client/dom/task.js
@@ -6,25 +6,21 @@ export const request_idle_callback =
 		? (/** @type {() => void} */ cb) => setTimeout(cb, 1)
 		: requestIdleCallback;
 
-let is_micro_task_queued = false;
-let is_idle_task_queued = false;
-
 /** @type {Array<() => void>} */
-let current_queued_micro_tasks = [];
+let micro_tasks = [];
+
 /** @type {Array<() => void>} */
-let current_queued_idle_tasks = [];
+let idle_tasks = [];
 
-function process_micro_tasks() {
-	is_micro_task_queued = false;
-	const tasks = current_queued_micro_tasks.slice();
-	current_queued_micro_tasks = [];
+function run_micro_tasks() {
+	var tasks = micro_tasks;
+	micro_tasks = [];
 	run_all(tasks);
 }
 
-function process_idle_tasks() {
-	is_idle_task_queued = false;
-	const tasks = current_queued_idle_tasks.slice();
-	current_queued_idle_tasks = [];
+function run_idle_tasks() {
+	var tasks = idle_tasks;
+	idle_tasks = [];
 	run_all(tasks);
 }
 
@@ -32,32 +28,33 @@ function process_idle_tasks() {
  * @param {() => void} fn
  */
 export function queue_micro_task(fn) {
-	if (!is_micro_task_queued) {
-		is_micro_task_queued = true;
-		queueMicrotask(process_micro_tasks);
+	if (micro_tasks.length === 0) {
+		queueMicrotask(run_micro_tasks);
 	}
-	current_queued_micro_tasks.push(fn);
+
+	micro_tasks.push(fn);
 }
 
 /**
  * @param {() => void} fn
  */
 export function queue_idle_task(fn) {
-	if (!is_idle_task_queued) {
-		is_idle_task_queued = true;
-		request_idle_callback(process_idle_tasks);
+	if (idle_tasks.length === 0) {
+		request_idle_callback(run_idle_tasks);
 	}
-	current_queued_idle_tasks.push(fn);
+
+	idle_tasks.push(fn);
 }
 
 /**
  * Synchronously run any queued tasks.
  */
 export function flush_tasks() {
-	if (is_micro_task_queued) {
-		process_micro_tasks();
+	if (micro_tasks.length > 0) {
+		run_micro_tasks();
 	}
-	if (is_idle_task_queued) {
-		process_idle_tasks();
+
+	if (idle_tasks.length > 0) {
+		run_idle_tasks();
 	}
 }
diff --git a/packages/svelte/src/internal/client/runtime.js b/packages/svelte/src/internal/client/runtime.js
index f490de45b1..647512b55f 100644
--- a/packages/svelte/src/internal/client/runtime.js
+++ b/packages/svelte/src/internal/client/runtime.js
@@ -668,13 +668,13 @@ function flush_queued_root_effects() {
 			queued_root_effects = [];
 
 			for (var i = 0; i < length; i++) {
-				var effect = root_effects[i];
+				var root = root_effects[i];
 
-				if ((effect.f & CLEAN) === 0) {
-					effect.f ^= CLEAN;
+				if ((root.f & CLEAN) === 0) {
+					root.f ^= CLEAN;
 				}
 
-				var collected_effects = process_effects(effect);
+				var collected_effects = process_effects(root);
 				flush_queued_effects(collected_effects);
 			}
 		}
@@ -739,9 +739,7 @@ export function schedule_effect(signal) {
 		queueMicrotask(flush_queued_root_effects);
 	}
 
-	last_scheduled_effect = signal;
-
-	var effect = signal;
+	var effect = (last_scheduled_effect = signal);
 
 	while (effect.parent !== null) {
 		effect = effect.parent;