Increase Macro Timeout limit in web config

In portal engine, I am currently experiencing the macro resolver time out issue due to macro time out. My code is fully optimized but anyhow i need to increase the timeout. I want to put generic timeout in web.config for macros instead of putting into after each macro codes. I didn't find any way to configure on CMS. Is there any way to put the macro timeout in web config then it would be a great help.

Thanks in advance

Regards, Chandra