[Plugin: Use Google Libraries] What about caching?

Hi? i am moving into this issue because I would love faster load time thanks Google CDN caching and browser caching. I am not an expert, but it seems it also depends ont he version of jquery.
Does this plugin help for sure?

http://ww.wp.xz.cn/extend/plugins/use-google-libraries/

Closed – Duplicate of:
http://ww.wp.xz.cn/support/topic/plugin-use-google-libraries-what-about-caching-1