flush less often

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

@@ -39,7 +39,7 @@ export function flatten(sync, async, fn) {
 					invoke_error_boundary(error, parent);
 				}
 
-				batch?.flush();
+				batch?.deactivate();
 			})
 			.catch((error) => {
 				boundary.error(error);

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

@@ -228,6 +228,10 @@ export class Batch {
 		current_batch = this;
 	}
 
+	deactivate() {
+		current_batch = null;
+	}
+
 	flush() {
 		if (queued_root_effects.length > 0) {
 			flush_queued_root_effects();