refactor(runtime-core): refactor props resolution

Improve performance in optimized mode + tests

packages/runtime-core/src/componentRenderUtils.ts

@@ -14,7 +14,7 @@ import {
   isVNode
 } from './vnode'
 import { handleError, ErrorCodes } from './errorHandling'
-import { PatchFlags, ShapeFlags, EMPTY_OBJ, isOn } from '@vue/shared'
+import { PatchFlags, ShapeFlags, isOn } from '@vue/shared'
 import { warn } from './warning'
 
 // mark the current rendering instance for asset resolution (e.g.
@@ -94,7 +94,7 @@ export function renderComponentRoot(
     if (
       Component.inheritAttrs !== false &&
       fallthroughAttrs &&
-      fallthroughAttrs !== EMPTY_OBJ
+      Object.keys(fallthroughAttrs).length
     ) {
       if (
         root.shapeFlag & ShapeFlags.ELEMENT ||