Firefox 3.5 has a new JavaScript engine, TraceMonkey, that runs many JavaScript programs 3-4x faster than Firefox 3, speeding up existing web apps and enabling new ones. This article gives a peek under the hood at the major parts of TraceMonkey and how they speed up JS. This will also explain what kinds of programs get the best speedup from TraceMonkey and what kinds of things you can do to get your program to run faster.

The key problems with -NC licenses are as follows:

* They make your work incompatible with a growing body of free content, even if you do want to allow derivative works or combinations.
* They may rule out other basic and beneficial uses which you want to allow.
* They support current, near-infinite copyright terms.
* They are unlikely to increase the potential profit from your work, and a share-alike license serves the goal to protect your work from exploitation equally well.