What is the difference between using ext-all.js and ext-all-debug.js?
Does changing to ext-all.js from debug.js improve performance?
Can I assume that switching from debug to normal file will not have any other impacts on the application?
Also, can any one suggest what ext-base.js do?
Ext-all is basically the minified verion of the debug one. The gain is that it greatly reduces the files size so that clients have to download less. Ext-base are the core functions of ext. If you only use those you could just include that file instead of the huge complete set in ext-all.
On the ext site there used to be a custom js builder where you would pick just the functions you need and it would create a custom js for you with just those modules