I've been doing some testing with Microsoft over the last month or two which I've simply been itching to talk about, but haven't been able to until now due to NDA. At the start of September the IIS team released a new PHP extension called WinCache for use with PHP/FastCGI on IIS which fills that large whole in PHP performance on IIS where an opcode cache should be. I've done some testing on my beta site, and the results have been very encouraging.
|REQUEST_URI fix for FastCGI on IIS 7||4997||0||5 years 51 weeks ago|
|Microsoft FastCGI Beta 1.5 for IIS 5.1 and 6 released||4761||0||5 years 17 weeks ago|
|Improvements for FastCGI in Win7 and Windows 2K8 R2||9590||100%||0||5 years 28 weeks ago|
|WinCache Opcode Cache for IIS||7447||100%||2||4 years 48 weeks ago|