We have a UIWebView in our app, displaying HTML data loaded from memory (not a file). We are experiencing some very strange bug/behavior. Some pages take very long time to render (1-2 minutes). We looked at the source of the pages, and it is indeed very busy with badly written CSS and HTML (not in our control). However, we noticed that if we set a webview to load a page, and then press the power button to shut the iPhone's screen, then immediately press the power button again, and go back to our app, the webview renders the page instantly.
Has anyone experienced this? Any ideas what's going on?
So, uhm, forgot to answer this. It ended up that some of our HTML data had images that were linking to internal organization URLs, which were not accessible outside. And since the web view did not ask the delegate whether it should load, we didn't know about those resources. Pressing the power button caused the connections to drop, which made it render the page.