Optimizing Immutable and Purity

[Walter Bright]

I've been working on improving the optimizer to take advantage of 
immutability and purity.

http://www.reddit.com/r/reddit.com/comments/7l5x4/optimizing_immutable_and_purity/
http://dobbscodetalk.com/index.php?option=com_myblog&show=Optimizing-Immutable-and-Purity.html&Itemid=29