Using appcache - best speed

[pmeenan]

Yep, as long as your platform is designed for it (and the benefits are for repeat viewers). It's particularly beneficial for mobile.

Don't just turn it on without knowing what you are doing though. Just like with caching your base html, if you turn on app cache, some set of your users will have the base page cached and you won't be able to fix it from the server (not a problem if your app expects it but dangerous if it doesn't).