[xwiki-users] "XWiki is initializing" message

I am in the process of writing an extension for XWiki. Each time I make some code changes, and then refresh my local instance of XWiki I see the message "XWiki is initializing..." which takes some time to finish. For small code changes, I feel like this "initialization" step slows down my development. What exactly is happening in this "XWiki is initializing..." step, and what could I do to avoid this step entirely, so that I can work faster on my extension?