Google Maps plugin is slow on ionic framework only

Is there any ionic framework expert? I need your help.

I have been developing a google maps plugin for PhoneGap, which is a wrapper library for Google Maps Android API v2 and Google Maps SDK for iOS.

Many ionic framework users report to me the performance issue.
I don’t know why but they said it’s terrible slow.
This error occurs on ionic framework only.
But I don’t have deep knowledges for ionic framework.

Please help my project.