Why the mobile web runs so slowly

<3 <3 <3

This happens so often to me. Please, people, add height/width to your images so that when the image loads/fails to load, the layout doesn't change.

And if you're using HTML5 postMessage for resizing iframes without scrolling, please use a fading animation on the height attribute. Side note: WHY ISN'T AUTO HEIGHT SPEC'D IN HTML5?!?!?!?!?

Oh, one thing I forgot: many, many people are too fucking stupid to deploy proper caching (e.g. using ETags, proper Expires headers,...) on their assets, thus causing needless requests. And for "larger scope" stuff you can use a HTML5 cache manifest to restrict all the queries for expiration to a single one for the manifest file.

Is that sometimes done on purpose? To increase clicks on ads?

Or is it just a matter of the dom redrawing in unpredictable ways as ad comment comes in?

I also often see the practice where a page completely loads, and then the page seems to entirely reload. And it makes me wonder if that's also an attempt to juice stats.