[PerformanceControlOfEmbeddedContent] Limits definition

From Web Performance Working Group discussion:

Where are limits defined? Is there a number associated with them? It feels like an easy thing to argue about.

Platform-defined limits that are a sliding scale over time mean that any semantics of what developers are defining may move over time. Would be a very tricky thing to do. Either you’re breaking content that didn’t break before, or you’re unable to move the slides because of content breakage.

We need developer-defined limits, and potentially, if you want to reward developers doing the right thing, then reward is something the platform can do over time. Not sure what the incentive model would be here. The values/limits themselves, need to be developer defined, or overwritten. You won’t be able to change defaults without breakage.