It's my opinion that core.async shouldn't be used a concurrency mechanism,
or as a new programming paradigm. Instead, it should be used as a
communication method between sequential processes, and as a de-coupling
method between modules. Let's go back to Rich's original post on the
library:

"There comes a time in all good programs when components or subsystems must
stop communicating directly with one another. This is often achieved via
the introduction of queues between the producers of data and the
consumers/processors of that data."

Thus, this library should be uses as a communication system between
subsystems, and not as a low level building block for the internals of a
subsystem. Now, in some languages (e.g. CLJS) this library may be the only
form of concurrency, but that's beyond the point.

So your concerns with multi-consumer, and the limitations of <! and <!! I
feel don't apply. the very fact that these functions are labeled as ! means
they contain side-effects. And as such, I should strive to keep these
functions at the boundaries of my code. Also, since I am using these items
at the bouderies, they most likely will be transferring fewer, larger
objects than many smaller objects. In this case, a few more CAS or lock
calls doesn't matter much at all.

In the same vein, having slower distributed puts/takes also doesn't concern
me as much. The types of systems I envision using core.async with would be
concerned more about fault-tolerance than performance. As Joe Armstrong
said once about Erlang (and I paraphrase): performance isn't as important
as fault-tolerance. What good is a program that runs fast, but doesn't get
the job done?

Almost all your proposed changes to core.async are driven by performance,
performance I don't think we need.

Just some thoughts :-)

Timothy Baldridge



On Mon, Jul 1, 2013 at 2:26 AM, pron <ron.press...@gmail.com> wrote:

> Oh, yeah. It's 0.2-SNAPSHOT.
>
>
> On Monday, July 1, 2013 11:24:40 AM UTC+3, puzzler wrote:
>>
>> I'd love to try this out, but when I follow the getting started
>> directions and add [co.paralleluniverse/pulsar "0.1.1"] to my dependencies,
>> I seem to get a completely different API and namespace layout than what is
>> given in the documentation.  Is there a "snapshot" release that contains
>> the latest changes?
>>
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-- 
“One of the main causes of the fall of the Roman Empire was that–lacking
zero–they had no way to indicate successful termination of their C
programs.”
(Robert Firth)

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