Why my index.html page is loaded very slowly

I tried to post my question on Sencha Forum but my account was disabled to post. I dont know why and sent msg to the administrator. And I need to figure it out asap.

I am using EXT JS4.0 MVC architecture developing my portal. Now, I have index.html which loads ext-all.css, ext-debug.js and app.js. App.js and its related files load some other 5 js files, most of them under view. Under firefox it tak开发者_Go百科es 9-11 seconds. Now, those are simple files with simple data and logic.

Did you try running YSlow on that page?

Its been a while for me and EXTJS, but did you try removing ext-debug.js? As i remember, you don't want to keep that on your production version.