Performance probem on new sidemenu?

Hi everyone,

I am a newbie at ionic framework and have a question, I install many ionic sample to mobile and find an problem,all app slow when switch view(ion-nav-view) and BusinessApp smooth, the app as list:

ionic view App:

ionic demo App:


I also create ionic app and create three ion-view to switch, one view has 10 button, one view has 20~30 item by ng-repeat, and another has nothing, and slow when switch view.