fix(runtime-core): ensure consistent identity of $forceUpdate and $nextTick instance methods

fix #5556

packages/runtime-core/src/component.ts

@@ -440,6 +440,15 @@ export interface ComponentInternalInstance {
    * @internal
    */
   [LifecycleHooks.SERVER_PREFETCH]: LifecycleHook<() => Promise<unknown>>
+
+  /**
+   * For caching bound $forceUpdate on public proxy access
+   */
+  f?: () => void
+  /**
+   * For caching bound $nextTick on public proxy access
+   */
+  n?: () => Promise<void>
 }
 
 const emptyAppContext = createAppContext()

packages/runtime-core/src/componentPublicInstance.ts

@@ -252,8 +252,8 @@ export const publicPropertiesMap: PublicPropertiesMap =
     $root: i => getPublicInstance(i.root),
     $emit: i => i.emit,
     $options: i => (__FEATURE_OPTIONS_API__ ? resolveMergedOptions(i) : i.type),
-    $forceUpdate: i => () => queueJob(i.update),
-    $nextTick: i => nextTick.bind(i.proxy!),
+    $forceUpdate: i => i.f || (i.f = () => queueJob(i.update)),
+    $nextTick: i => i.n || (i.n = nextTick.bind(i.proxy!)),
     $watch: i => (__FEATURE_OPTIONS_API__ ? instanceWatch.bind(i) : NOOP)
   } as PublicPropertiesMap)