The codegen creates a cache of delegates (created using expression trees), but uses a structure more suited to the problem than a simple ConcurrentDictionary.

The codegen creates a cache of delegates (created using expression trees), but uses a structure more suited to the problem than a simple ConcurrentDictionary. [1]: http://geekswithblogs.net/simonc/archive/2012/07/20/inside-the-dlr---callsites.aspx http://geekswithblogs.net/simonc/archive/2012/07/20/inside-t...