API draft proposal: DOM Timing

Hi everyone,

I've had a rough idea for what's at the top of my wishlist in terms of
client-side performance APIs that don't exist yet, and turned it into this
document:
https://docs.google.com/document/d/1uClbE5oVGeChekv3VB5Zg3LNorU7VkfxHmNQdFxbP8M/edit?usp=sharing

This working group seems like it could be a good place for this work to
happen. For now I'm soliciting feedback on the idea itself. Maybe it's
nonsensical, maybe it's too hard to implement. I think there are a lot of
people here who could provide valuable opinions on it. Feel free to respond
directly on the document or here.

Also, let me know if this is the right venue to discuss this sort of thing
or if there is a better place to discuss nascent web performance browser
API proposals.

Thanks,
Gilles