Optimize state updates done in the commit hook (#550)

Co-authored-by: Tomek Zawadzki <[email protected]>

android/src/main/new_arch/MarkdownCommitHook.cpp

@@ -107,26 +107,31 @@ RootShadowNode::Unshared MarkdownCommitHook::shadowTreeWillCommit(
     rootNode = rootNode->cloneTree(
         nodes.textInput->getFamily(),
         [this, &stateData, &textInputState, &nodes](ShadowNode const &node) {
-          auto newStateData =
-              std::make_shared<AndroidTextInputState>(stateData);
-          // force measurement of a map buffer
-          newStateData->cachedAttributedStringId = 0;
-
-          // setting -1 as the event counter makes sure that the update will be ignored by the java
-          // part of the code, which is what we want as we don't change the attributed string here
-          if (previousEventCount_.contains(nodes.textInput->getTag()) &&
+          std::shared_ptr<ShadowNode> newNode = nullptr;
+
+          if (stateData.cachedAttributedStringId != 0) {
+            auto newStateData =
+                std::make_shared<AndroidTextInputState>(stateData);
+
+            // force measurement of a map buffer
+            newStateData->cachedAttributedStringId = 0;
+
+            // setting -1 as the event counter makes sure that the update will be ignored by the java
+            // part of the code, which is what we want as we don't change the attributed string here
+            if (previousEventCount_.contains(nodes.textInput->getTag()) &&
               previousEventCount_[nodes.textInput->getTag()] == stateData.mostRecentEventCount) {
               newStateData->mostRecentEventCount = -1;
-          } else {
+            } else {
               previousEventCount_[nodes.textInput->getTag()] = stateData.mostRecentEventCount;
-          }
+            }
+
+            auto newState = std::make_shared<const ConcreteState<AndroidTextInputState>>(
+                newStateData, textInputState);
 
-          // clone the text input with the new state
-          auto newNode = node.clone({
-              .state =
-                  std::make_shared<const ConcreteState<AndroidTextInputState>>(
-                      newStateData, textInputState),
-          });
+            newNode = node.clone({ .state = newState });
+          } else {
+            newNode = node.clone({});
+          }
 
           const auto currentDecoratorProps =
               nodes.decorator->getProps()->rawProps["markdownStyle"];