Chapter 10. Debugging and Performance

In previous chapters, we discussed the role of the architect as being one with many facets. From understanding client requirements to designing the code structure based on UI wireframes right down to coding standards and naming conventions, an architect will wear many hats during the lifetime of a project.

One of these hats is that of planning with knowledge of the technology at hand. In order to make sure that the users of a software platform have a responsive experience that won't result in frustration, we need to make sure that the design that's in place will load quickly and will promptly react to user input. With Ext JS, this means having an understanding of the right component to use at the right time, working with layouts in an efficient manner, designing your view model hierarchy to avoid overnesting, and so on. There are lots of things to consider.

Once the design is complete, there may be unexpected performance issues or...