[thinline]

In the older post you mentioned one of the performance issues being that JS couldn't write directly to the GPU for security reasons and so a copy to the GPU would have to be done after the browser vetted things.

To my _very_ naive thinking, and if video RAM was plentiful, couldn't things be set up such that the JS runtime _could_ write to the GPU, but to a reserved section of video memory that wasn't directly executable? After being checked by the JS runtime, bytecode could be copied over to another area in video memory to be run. Would something like this work? If so, has this approach been tried by anyone?