Microcaching at the page level is of course a great idea for a dynamic app, but only works if the content being served is identical for all users - in which cas

Microcaching at the page level is of course a great idea for a dynamic app, but only works if the content being served is identical for all users - in which case why not just use static pages. Oh right, because we only know how to use Wordpress. Ditching wordpress for a static generator should be the preferred route, if possible. (use disqus or similar for comments). The vast universe of truly dynamic apps that we write in Rails or Python or whatever usually have page elements that are specific to the user's session - "Welcome John Smith" and all that (edit: oh i see he mentioned that at the bottom). So page-level caching isn't feasible there, unless like in the case of disqus you're using javascript to inject personalized content from another server. But for a really interactive web application where coarse grained solutions like this aren't feasible, I'm still a proponent of page-component level caching, something you normally do in your app layer, not the web server layer.