Reflow/Layout performance for large application

Question

I am using GWT to build a HTML application where the performance is correct in general.

Sometimes, it can load many objects in the DOM and the application becomes slow.

Answer 1

The most basic answer to your question is to use lazy evaluation, also called delayed evaluation. The principle is that you only evaluate a new position when something it depends upon has changed. It generally requires a fair amount of code to set up but is much cleaner to use once that's done. You'd make one assignment to something (such as a window size) and then all the new values propagate automatically, and only the values that need to propagate.