I agree (I don't see a performance issue, rather, a compatibility issue)
While I am certain everyone would agree that 100% compatibility should be the
goal, I am not convinced how "critical" this addition is:
in particular, how difficult is it to do a quick code change?
Unlike basic data types, there are quite a few reasons I don't see Fibers
being a large percentage of any code.
Does anyone have any truly compelling examples where Fibers are truly the
only/right way to go, vs. an alternate design?
I don't see them scaling well (see ruby-doc.org) - meaning, their advantage is
restricted in scope.
e.g. (MSDN)
"In general, fibers do not provide advantages over a well-designed
multithreaded application."
The term "lightweight" seems to correlate near 1.0 with "fiber" on web
pages... one (not all) of GCD's primary goals in life is: lightweight ...
which makes me think/agree this really boils down to measuring the pain/cost
of having this one feature MIA (e.g. source translation/compatibility) vs.
not...
-Daniel
On Wed, 11 Aug 2010 17:15:54 -0700
"Jordan K. Hubbard" <j...@apple.com> wrote:
On Aug 11, 2010, at 3:23 PM, easco wrote:
My concern for the feature is focused not so much on the performance impact
of using it, as it focuses on the fact that Fibers have been added to the
1.9.x language. They appear to be an important part of the External
Enumerators feature and that feature seems to have a lot of people very
excited.
Any external libraries that make use of Fibers or External Enumerators stand
a good chance of not working in MacRuby. In that case MacRuby becomes
"Mac-MostOfRuby" which makes it harder to adopt... etc. I'd rather that
didn't happen.
Perhaps the big take-away from this discussion then is that we need someone
to pick up the gauntlet of Fiber support in MacRuby and figure out how to
make it perform "acceptably" given the caveats Laurent has already outlined.
Any volunteers?
- Jordan
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