I really like the idea of Zenbox, but I had to turn it off because the Chrome extension was bringing my browing experience to a crawl, on all sites (not just gmail). Hope team Zenbox can resolve the performance issues!
Thanks for the feedback, there are a few challenges around this - we need to get it order ASAP. We've had a few performance-only hack days, and have another one this weekend.
It'd probably be work a blog post talking about some of the challenges around eeking out performance in places where you're not accounted for (as an extension, for example), and some ways to work around it - once we've fixed it, of course!
