Need ISAPI Extension sample code for WEC2013

I have a web server running on HTTPD and uses ISAPI Extensions. The Code was ported from Win CE 6.0 and running lot slower on a much faster iMX6. I would like to have some example projects for ISAPI extension functions.

There are no major changes in the ISAPI implementation between CE6 and WEC2013, the same code should work on both platforms.
Can you describe the issue in more detail, giving us some more information about what your extension does and where it seems to be slower on i.mx6 (compare to what)?
Did you test raw network performances (transferring big files etc.)?