To use it must include the "Fastcode" unit in the first order
　of your uses clauses of your delphi project. If you're using
　and alternative memory manager and/or FastMove the order should
　be like:

　FastMM4,
　FastMove,
　FastCode,
　... etc ...

我在一个项目了，仅仅在.dpr里uses了它们，速度好像没有多少提高：
加载一个比较大的virturltree时，速度从uses它们前的3.3秒提到3.1秒。。。。