[Swift-devel] faster branch

[Lorenzo Pesce]

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).
> 
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