http://developers.de/blogs/indraneel/archive/2016/03/21/improving-performance-of-sencha-touch-ext-js-application-heck-1-json-v-s-ext-encode-decode.aspx  It has been some time that I have been working on improving a cross platform application which has been built using Sencha Touch and Cordova. The application originally had Sencha Touch 2.2 framework, and I managed to upgrade it to Sencha TouchenCommunityServer 2008 SP1 (Build: 30619.63)