[philipwalton]

It's likely not "blocked" by analytics since pretty much all analytics libraries get loaded async.

However, scripts loaded before the `load` event do delay the load event, and analytics script are typically loaded with the lowest priority, so they're usually last and thus the ones you notice in the bottom-left corner of your window.

But the only way they'd be "blocking" anything is if the site was waiting for the load event to initialize any critical functionality (which it shouldn't be).

[nathancahill]

Shouldn't, but this is absolutely common in the wild. Another one I get often (which makes me need to disable my ad blocker) is UI actions that first log the action in X analytics library and then execute the function. When X library is blocked, the code path never reaches the function. Off the top of my head, flight/hotel reservation websites are particularly bad about this.