Ionic 2 performance optimization checklist?


I have developed several small applications with ionic previously and am now trying to create a larger application. I have a problem where at the current stage the system became almost unbearably laggy when moving from screen to screen or issuing events.
I do know that there is plenty of optimization that could be done on the app but I do not know where to start. Could anyone suggest me some primary areas to check out? Or maybe some guides on ionic app optimization? I also heard that there are plenty of things to optimize from Angular’s side, but I am not sure which are applicable to Ionic2.
Finally - I saw several guides only about Ionic app optimization, but did not find any that would talk about Ionic 2. So again - I do not know how many of those tips are applicable to the version that I am using.

Thanks in advance!