[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).


break;
    }
  };
}
export default function<T, P, I, TI, HI, PI, C, CC, CX, PL>(
  config: HostConfig<T, P, I, TI, HI, PI, C, CC, CX, PL>,
) {
  const stack = ReactFiberStack();
  const hostContext = ReactFiberHostContext(config, stack);
  const legacyContext = ReactFiberLegacyContext(stack);
  const newContext = ReactFiberNewContext(stack);
  const {popHostContext, popHostContainer} = hostContext;
  const {
    popTopLevelContextObject: popTopLevelLegacyContextObject,
    popContextProvider: popLegacyContextProvider,
  } = legacyContext;
  const {popProvider} = newContext;
  const hydrationContext: HydrationContext<C, CX> = ReactFiberHydrationContext(
    config,
  );
  const {beginWork} = ReactFiberBeginWork(
    config,
    hostContext,
    legacyContext,
    newContext,
    hydrationContext,
    scheduleWork,
    computeExpirationForFiber,
  );
  const {completeWork} = ReactFiberCompleteWork(