Merge pull request #24 from ar90n/feature/update-only-if-state-change…

…-occurs perf: Update only if state change occurs
ar90n · May 31, 2022 · 585fb37 · 585fb37
2 parents 980af46 + f023ec2
commit 585fb37
Showing 1 changed file with 5 additions and 4 deletions.
diff --git a/alfort/app.py b/alfort/app.py
@@ -223,10 +223,11 @@ def render() -> None:
         def dispatch(msg: M) -> None:
             nonlocal state
             nonlocal root
-            (state, effects) = self._update(msg, state)
-            # TODO: should check state has been changed
-            self._subscriber.update(state, dispatch)
-            self._enqueue(render)
+            old_state = state
+            (state, effects) = self._update(msg, old_state)
+            if state != old_state:
+                self._subscriber.update(state, dispatch)
+                self._enqueue(render)
             self._run_effects(dispatch, effects)
 
         self._subscriber.update(state, dispatch)