I don’t have any original thoughts here, just a collection of resources which I found that summarize techniques I’ve heard about in the past but not had to use directly until now.
General best practices
I hate that phrase, but oh well.
- According to Google, including specific info on minimizing RTT (round trip time).
- According to Yahoo
Async function queuing
That’s the technique of defering loading the bulk of a 3rd party library, and while it’s loading having client code add what it wants to do to a ‘queue’ of deferred operations which are then executed once the 3rd party library eventually loads. Google’s async analytics tag is a well-known example of this technique.
It’s well described in this StackOverflow post.
Using ‘async’ and ‘defer’ script tag attributes
As usual, Ilya Grigorik does a great job covering how to do async script loading.
Chris Coyier at CSS-Tricks covers similar ground too.