Minor documentation changes

docs/guides/style.md

@@ -31,10 +31,9 @@ const styles = StyleSheet.create({
 })
 ```
 
-Using `StyleSheet.create` is optional but provides some key advantages: styles
-are immutable in development, certain declarations are automatically converted
-to CSS rather than applied as inline styles, and styles are only created once
-for the application and not on every render.
+Using `StyleSheet.create` is optional but provides the best performance
+(`style` is resolved to CSS stylesheets). Avoid creating unregistered style
+objects.
 
 The attribute names and values are a subset of CSS. See the `style`
 documentation of individual components.
@@ -56,12 +55,6 @@ A common pattern is to conditionally add style based on a condition:
   styles.base,
   this.state.active && styles.active
 ]} />
-
-// or
-<View style={{
-  ...styles.base,
-  ...(this.state.active && styles.active)
-}} />
 ```
 
 ## Composing styles

src/apis/StyleSheet/registry.js

@@ -68,12 +68,6 @@ const registerStyle = (id, flatStyle) => {
 const resolveProps = (reactNativeStyle) => {
   const flatStyle = flattenStyle(reactNativeStyle);
 
-  if (process.env.__REACT_NATIVE_DEBUG_ENABLED__) {
-    console.groupCollapsed('[render] deoptimized: resolving uncached styles');
-    console.log('source style\n', reactNativeStyle);
-    console.log('flattened style\n', flatStyle);
-  }
-
   const domStyle = createReactDOMStyle(flatStyle);
   const style = {};
 
@@ -99,7 +93,14 @@ const resolveProps = (reactNativeStyle) => {
   };
 
   if (process.env.__REACT_NATIVE_DEBUG_ENABLED__) {
-    console.log('DOM props\n', props);
+    console.groupCollapsed('[StyleSheet] resolving uncached styles');
+    console.log(
+      `Slow operation. Resolving style objects (uncached result). ` +
+      `Occurs on first render and when using styles not registered with "StyleSheet.create"`
+    );
+    console.log('source => \n', reactNativeStyle);
+    console.log('flatten => \n', flatStyle);
+    console.log('resolve => \n', props);
     console.groupEnd();
   }