> On Mon, Jun 20, 2011 at 7:28 AM, Stephen De Gabrielle > <stephen.degabrie...@acm.org> wrote: >> there's also a discussion going on here: >> >> http://reddit.com/comments/i1slm > > ...of internet quality (that's an oxymoron).
Still, I'd be delighted if people upvoted the link. :) I did notice that the Reddit discussion was getting _very_ sidetracked by performance issues. So I changed a few things in my internal implementation to make it perform competitively at least with the PyPy example. Hopefully that will help quell the concerns about performance, and put the focus back on the tutorial. In more detail: the key performance issue was the inefficient use of parameters. I had wanted to make sure I was using a fresh state per module, so I had set up a parameter called 'current-state' that was parameterized over the body of the module. It turns out that this is not an efficient way to scope the state to the module's body. As an alternative, I replaced this with a use of the syntax-parameterize form in the racket/stxparam library, and that improved performance quite a bit. _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
