chore: undo the change bench

Author: LittleSound

playground/src/bench/App.vue

@@ -39,8 +39,7 @@ const run = wrap('run', () => {
 const update = wrap('update', () => {
   const _rows = rows.value
   for (let i = 0; i < _rows.length; i += 10) {
-    const row = Object.assign({}, _rows[i], { label: _rows[i].label + ' !!!' })
-    _rows[i] = row
+    _rows[i].label += ' !!!'
   }
   setRows()
 })