[This example](https://codesandbox.io/s/1zn2o513pq) presents a huge performance drop between React 16.2 and React 16.3.

In investigated it and noticed several things:

- Perfomance drop is only visible using development bundle
- This is not related to styled-components (a simple div presents the same problem)
- I tried to investigate in performance tab of Chrome dev tools and I noticed that I get React measures even without "?react_perf"
- React Tree Reconciliation seems very long, do not know why

It is not a big problem for me, but it looks weird, so I decided to [share it on Twitter](https://twitter.com/neoziro/status/979756579296817154),  then @gaearon [invited me to submit an issue about it](https://twitter.com/dan_abramov/status/980036013518139398).


/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */
import type {ReactElement, Source} from 'shared/ReactElementType';
import type {ReactPortal, RefObject} from 'shared/ReactTypes';
import type {TypeOfWork} from 'shared/ReactTypeOfWork';
import type {TypeOfMode} from './ReactTypeOfMode';
import type {TypeOfSideEffect} from 'shared/ReactTypeOfSideEffect';
import type {ExpirationTime} from './ReactFiberExpirationTime';
import type {UpdateQueue} from './ReactFiberUpdateQueue';
import invariant from 'fbjs/lib/invariant';
import {NoEffect} from 'shared/ReactTypeOfSideEffect';
import {
  IndeterminateComponent,