I have an app with multiple tabs. Under each tab it is a large list with models and group helpers and etc. I did a lot of optimization so each table cell is not even an ember view.
I found that when the list grows large (50+ items), switching between those tabs become slow in IE9. It works very well in IE10+ as well as other browsers. Can anyone explain a bit what is the expensive thing during route transition and shed some light on how to fix this?