It's true that this won't make Javascript or HTTP any faster, but it's still very exciting to me. This is about making Canvas faster. That's great because nearly all of the canvas games/demos have been spending around 90% of their cycles waiting on Canvas and only 10% in Javascript. As great as Canvas is, so far it has only been able to replicate games from the era of the 2Mhz SNES. With this change, we may be able to reach the 30Mhz PlayStation 1 era (only 15 years behind the curve!).