由于这个原因，对JIT的改变会极大地影响之前编译好的程序集。
Because of this, changes to the JIT can have a significant impact on previously compiled assemblies.
另一种可能是传入一段源代码并返回一颗表达式树，而不是一个编译好的程序集。
One proposed option would be passing in some source code and being returned an expression tree instead of just a compiled assembly.
在传统的非rt环境中，在程序执行时编译代码效果非常好，因为大部分的编译器操作对应用程序性能是透明的。
In a traditional non-RT environment, compiling code while the program executes works well because the compiler's actions are mostly transparent to the application's performance.
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