# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2019-06-01 23:54:46 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/1134971582751731712) In reply to: [@keefmoon](http://twitter.com/keefmoon/status/1134971581434908673) The upside is that it tricks you into optimising your code to within an inch of its life, so that when you run it in the proper simulator and on a device, it runs buttery smooth.