React-Native用户的另一个潜在修复:

Chrome取消Javascript在任何标签中运行的优先级，而不是在前台。因此，如果启用了远程调试，请确保将调试器放在自己的窗口中。

您可以尝试关闭远程调试(Cmd-D ->停止远程JS调试)。这通常会加快速度。

I don't have the rep yet to leave a comment, but I upvoted some answers here and wanted to say more. I had a problem with slow animations in the iOS Simulator, especially on rotation, and I found this post via Google. Indeed, somehow "Toggle Slow Animations" must have been on, because three shifts fixed it. At first, I didn't think this was a problem because there's no checkmark next to "Toggle Slow Animations." It turns out there's never a checkmark, or any indication from the menu whether it's on or off. So just try toggling it and see if the rotation/navigation is faster/slower.

所以，谢谢大家!

我认为你错误地按了command + T而不是command + R。

当chrome调试是活动的，浏览器选项卡不在前台，模拟器也很慢。对我来说，我决定把指南放在前台。

进入模拟器菜单 Device ->重启

然后一切都比你想象的快-_-