Slow rendering

Slow rendering is another performance issue that powerfully influences the user experience. Users expect interactive and smooth user interfaces, and that's where a development team needs to increasingly focus their efforts. It's not enough to make loading and the first rendering fast; the application also needs to perform well. Response time should be instantaneous, animations should be smooth, and scrolling should be stick-to-finger-fast. To create an application with an excellent experience, a developer needs to understand how to write code that runs as efficiently as possible.