tidy up

packages/svelte/src/internal/client/reactivity/deriveds.js

@@ -6,7 +6,6 @@ import {
 	CLEAN,
 	DERIVED,
 	DIRTY,
-	EFFECT_ASYNC,
 	EFFECT_PRESERVED,
 	MAYBE_DIRTY,
 	STALE_REACTION,
@@ -26,7 +25,7 @@ import {
 import { equals, safe_equals } from './equality.js';
 import * as e from '../errors.js';
 import * as w from '../warnings.js';
-import { destroy_effect, render_effect } from './effects.js';
+import { async_effect, destroy_effect, render_effect } from './effects.js';
 import { inspect_effects, internal_set, set_inspect_effects, source } from './sources.js';
 import { get_stack } from '../dev/tracing.js';
 import { tracing_mode_flag } from '../../flags/index.js';
@@ -114,7 +113,7 @@ export function async_derived(fn, location) {
 	// only suspend in async deriveds created on initialisation
 	var should_suspend = !active_reaction;
 
-	render_effect(() => {
+	async_effect(() => {
 		if (DEV) current_async_effect = active_effect;
 
 		try {
@@ -187,7 +186,7 @@ export function async_derived(fn, location) {
 		};
 
 		promise.then(handler, (e) => handler(null, e || 'unknown'));
-	}, EFFECT_ASYNC | EFFECT_PRESERVED);
+	});
 
 	return new Promise((fulfil) => {
 		/** @param {Promise<V>} p */

packages/svelte/src/internal/client/reactivity/effects.js

@@ -33,7 +33,8 @@ import {
 	EFFECT_PRESERVED,
 	BOUNDARY_EFFECT,
 	STALE_REACTION,
-	USER_EFFECT
+	USER_EFFECT,
+	EFFECT_ASYNC
 } from '#client/constants';
 import * as e from '../errors.js';
 import { DEV } from 'esm-env';
@@ -331,6 +332,14 @@ export function legacy_pre_effect_reset() {
 	});
 }
 
+/**
+ * @param {() => void | (() => void)} fn
+ * @returns {Effect}
+ */
+export function async_effect(fn) {
+	return create_effect(EFFECT_ASYNC | EFFECT_PRESERVED, fn, true);
+}
+
 /**
  * @param {() => void | (() => void)} fn
  * @returns {Effect}