Porting C# code

[Brien]

Iivari Mokelainen Wrote:
> Every managed->unmanaged call is checked somehow, and there was an 
> attribute which lets you do pinvoke calls extremely fast but unsafe. 
> printf perfomance was pretty much the same as in C++ with that 
> attribute. Its used internally to do OS calls very fast, iirc it was 
> undocumented. Try some disassemblers on .net framework, mainly parts 
> that do OS calls.
> 
> Good Luck
> 
> - data

Pinvoke is no good for functions that are fast and invoked a lot.

Here's some good proof
http://community.opennetcf.com/articles/cf/archive/2008/01/31/performance-implications-of-crossing-the-p-invoke-boundary.aspx

-Brien