chore: deduplicate code (#11534)

packages/svelte/src/internal/client/runtime.js

@@ -550,13 +550,7 @@ function process_effects(effect, filter_flags, shallow, collected_effects) {
 			}
 
 			if ((flags & RENDER_EFFECT) !== 0) {
-				if (is_branch) {
+				if (!is_branch && check_dirtiness(current_effect)) {
-					if (!shallow && child !== null) {
-						current_effect = child;
-						continue;
-					}
-				} else {
-					if (check_dirtiness(current_effect)) {
 					execute_effect(current_effect);
 					// Child might have been mutated since running the effect
 					child = current_effect.first;
@@ -565,7 +559,6 @@ function process_effects(effect, filter_flags, shallow, collected_effects) {
 					current_effect = child;
 					continue;
 				}
-				}
 			} else if ((flags & EFFECT) !== 0) {
 				if (is_branch || is_clean) {
 					if (!shallow && child !== null) {