[Swift-devel] faster branch

[Lorenzo Pesce]

Thanks a lot!

On Feb 14, 2013, at 12:47 PM, David Kelly wrote:

> Lorenzo,
> 
> I have a module available now on beagle called swift/fast.
> 
> From: "Lorenzo Pesce" <lpesce at uchicago.edu>
> To: "Michael Wilde" <wilde at mcs.anl.gov>
> Cc: "Swift Devel" <swift-devel at ci.uchicago.edu>
> Sent: Thursday, February 14, 2013 11:32:45 AM
> Subject: Re: [Swift-devel] faster branch
> 
> Thanks a lot Mike.
> 
> Some day I would like to learn how to build them so I stop asking. I keep hoping I will have time, but it never seems to happen...
> 
> On Feb 14, 2013, at 10:32 AM, Michael Wilde wrote:
> 
> > David, can you build this and place it in a Beagle module?
> > 
> > A good exercise for Yadu as well.
> > 
> > Thanks,
> > 
> > - Mike
> > 
> > ----- Original Message -----
> >> From: "Lorenzo Pesce" <lpesce at uchicago.edu>
> >> To: "Mihael Hategan" <hategan at mcs.anl.gov>
> >> Cc: "Swift Devel" <swift-devel at ci.uchicago.edu>
> >> Sent: Thursday, February 14, 2013 10:20:56 AM
> >> Subject: Re: [Swift-devel] faster branch
> >> 
> >> 
> >> Sorry for being dumb here. It seems to be a bit different from the
> >> process defined on the web site:
> >> $ mkdir swift-0.93 $ cd swift-0.93 $ svn co
> >> https://cogkit.svn.sourceforge.net/svnroot/cogkit/branches/4.1.9/src/cog
> >> $ cd cog/modules $ svn co
> >> https://svn.ci.uchicago.edu/svn/vdl2/branches/release-0.93 swift $
> >> cd swift $ ant redist
> >> 
> >> 
> >> what should I do? Just download the src and assume the rest is in?
> >> 
> >> 
> >> Sorry for the silly question, I would like to install it today, but I
> >> don't have the time to search for more details.
> >> 
> >> 
> >> 
> >> 
> >> 
> >> 
> >> On Feb 12, 2013, at 8:22 PM, Mihael Hategan wrote:
> >> 
> >> 
> >> 
> >> Hi,
> >> 
> >> Over the past couple of weeks I committed the faster branch. It's
> >> essentially a re-implementation of the karajan language.
> >> 
> >> The gist of it is that it is now a semi-compiled language. What I
> >> mean
> >> by that is that there is no code generation, so the initial parse
> >> tree
> >> is converted into a compiled tree. Variable and function references
> >> are
> >> resolved at compile-time. This provides considerable improvements in
> >> performance from two fronts:
> >> 
> >> 1. The interpreter was changed from an event-based system (a system
> >> that
> >> made sense many years ago, but has little relevance for swift) to a
> >> lightweight threading implementation based on exceptions.
> >> 2. The compiler can make optimizations that weren't possible with a
> >> dynamic language. For example, once the swift and logging settings
> >> are
> >> known, code that conditionally executes based on a swift property or
> >> logging statements can be optimized away and have no run-time
> >> overhead.
> >> 
> >> There is also a benefit in memory consumed. Variables are now stored
> >> in
> >> arrays rather than hashtables. This should reduce the run-time
> >> overhead
> >> of the engine.
> >> 
> >> There are a few more relevant changes from swift's perspective:
> >> - there is no more karajan xml. Keeping two inter-operable syntaxes
> >> was
> >> a pain in the back.
> >> - sites.xml is now parsed with a DOM parser
> >> - all the coaster code has been moved into provider-coaster. Karajan
> >> is
> >> now independent of that (and the other way around).
> >> 
> >> Most of the tests pass, but that means little. So if you can give it
> >> a
> >> shot, please do. If it works sufficiently well, we can merge this
> >> into
> >> trunk.
> >> 
> >> Code is at:
> >> https://cogkit.svn.sourceforge.net/svnroot/cogkit/branches/faster/
> >> https://svn.ci.uchicago.edu/svn/vdl2/branches/faster
> >> 
> >> Mihael
> >> 
> >> (PS: Contrary to my initial beliefs, the TUI seems to mostly work,
> >> but I
> >> haven't tested in detail).
> >> 
> >> _______________________________________________
> >> Swift-devel mailing list
> >> Swift-devel at ci.uchicago.edu
> >> https://lists.ci.uchicago.edu/cgi-bin/mailman/listinfo/swift-devel
> >> 
> >> 
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> >> 
> 
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