[alexhaefner]

I respectfully disagree with your use of low level, though I do understand your analogy about the pixelbuffer being like a frame buffer.

But he's actually using Javascript arrays which can get passed around inside a javascript VM, and do not have a set size. Not very "low level".

I spent a moment and changed the arrays to Float32Arrays which have set sizes and sit in memory without being fucked with by the VM and sped the demo up dramatically.

http://jsfiddle.net/uzMPU/2612/

[malkia]

If possible the map array should be uint8_t, while texmap uint32_t

[look_lookatme]

Side by side, this is amazingly smoother than the OP.

[philf]

For me, the difference is only visible using Firefox. Chromium even renders the inefficient original version smoothly.

[mdonahoe]

The magic of Just In Time compilation perhaps?

[Tloewald]

Interesting -- this is slower on my iPad.