No, because the bottleneck isn't just model speed. The model has to literally compile the engine and run the massive test suites. Some of that could be sped up if you had a real build farm instead of my little computer, but there's a limit to how much you can parallelize things. And remember, I was porting WebKit, not remaking it, which would be orders of magnitude more work.

So you're not going to get to "build me an original web browser from scratch, make no mistakes" and get a new app the next morning or even next week, I don't think.