Now that you know how to profile your Shiny app code to identify which parts of your code is slowing down your app, the next step is to increase the performance of your code and hence your app. The following video from the Shiny Developer Conference has some tips on this.
If you have questions about this article or would like to discuss ideas presented here, please post on RStudio Community. Our developers monitor these forums and answer questions periodically. See help for more help with all things Shiny.