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Re: Using ArrayBuffer as payload for binary data to/from Web Workers

From: Kenneth Russell <kbr@google.com>
Date: Mon, 7 Mar 2011 18:17:07 -0800
Message-ID: <AANLkTikLY6yCx=LXv2mk7RBAXpJRBuAQt7k_=taRhAPi@mail.gmail.com>
To: Chris Marrin <cmarrin@apple.com>
Cc: Glenn Maynard <glenn@zewt.org>, Web Applications Working Group WG <public-webapps@w3.org>
On Mon, Mar 7, 2011 at 5:18 PM, Chris Marrin <cmarrin@apple.com> wrote:
>
> On Mar 7, 2011, at 4:46 PM, Kenneth Russell wrote:
>
>> On Mon, Mar 7, 2011 at 3:54 PM, Glenn Maynard <glenn@zewt.org> wrote:
>>> On Mon, Mar 7, 2011 at 6:05 PM, Chris Marrin <cmarrin@apple.com> wrote:
>>>>
>>>> Now that ArrayBuffer has made its way into XHR, I think it would be
>>>> reasonable to somehow use this new object type as a way to pass data to and
>>>> from Workers without copying. I've seen hints and thoughts about this here
>>>> and there, but I've never seen a formal discussion. I'm not even sure if
>>>> webapps is the place for this discussion, although it seems like a
>>>> reasonable place. Please let me know if there is a better place.
>>>
>>> ArrayBuffer is the most obvious use for zero-copy messaging, but I don't
>>> think it should be limited to it...
>>>
>>>> Has there been discussion anywhere that I've missed?
>>>
>>> Probably not the only one, but check the "WebWorkers and images" thread on
>>> whatwg.
>>
>> There's definitely interest among the editors of the Typed Array spec
>> in revising the spec to support zero-copy data transfers to and from
>> web workers. In informal offline discussions, there was a tentative
>> plan to put up a new draft for discussion within the next month or so.
>> A goal was to prototype it before solidifying a spec so that we can be
>> assured it will work well for real-world use cases.
>
> Yeah, I guess the question is whether we should put the functionality into ArrayBuffer, or into a wrapper class which would part of the Web Worker spec. The latter might make it easier to add other resources (like image and canvas) at some point. But I agree, it should be implemented before finalizing anything.
>
> Did I hear you volunteer to add a strawman proposal to the Typed Array spec? :-)

Yes, you did. :-)

-Ken
Received on Tuesday, 8 March 2011 02:17:36 GMT

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