[whatwg] canvas, img, file api and blobs

Stef Epardaud stef at epardaud.fr
Wed Feb 17 00:35:08 PST 2010

On Tue, Feb 16, 2010 at 07:25:34PM +0000, Stefan Haustein wrote:
>      We've been getting pretty good traction on Vlad's ArrayBuffers proposal,
>      which was taken from the WebGL spec. Our current plan is to change the
>      names in the browsers (WebKit, Chrome and Mozilla) to the "non-WebGL
>      specific" names Vlad proposes in his spec. We'd really like this to be the
>      "one true binary data access" mechanism for HTML. We're talking to the
>      File API guys about this and I think this API can be adapted in all the
>      other places as well.
>      As far as performance goes, can you point me at some quantitative data?
>      When you say it's an "orders-of-magnitude" bottleneck, what are you
>      comparing it to? The API is very new and we certainly want to improve it
>      for the various purposes it can be put to. We've even talked about
>      optimizations inside the JS implementations to improve access performance.

If we can get something akin to Java's System.arraycopy (
) then the ArrayBuffer proposal would work for me :)

If we cannot copy ArrayBuffer ranges by blocks in an effecient manner,
then it's going to be very limiting.
Stéphane Epardaud

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