Hello developers,
Are you encountering performance issues on Windows Phone 8? It’s most likely caused by display.newText() or similar text rendering features which are inherently slow on this platform, especially if text is created or updated frequently.
The recommended solution is to use a bitmap font library. Please see the following guide for more details:
http://docs.coronalabs.com/coronacards/wp8/portapp.html#optimizing-text-performance
Best regards,
Brent