2009 R2 Web Services Recommendation for better performance B2C

Hi folks,

I am implementing a B2C scenario and I'm facing severe performance problems, regarding load over the NAV Web Services.

Is there any documentation with recommendations for this scenarios? Or recommendations based on your experiences? A see a lot of possibilities in the customsettings.config file, but don't have 100% sure if it is improving performance, because the performance problems always return.

Thanks in advance.