[otrs] Odd one - Any performance inprovement by using mod_pagespeed?

I have been noticing some performance lags lately and noticed my browser does not always download the most correct CS/JS files. I was thinking about installing mod_pagespeed to trigger the browser to get those modifications. But I was curious as to whether anyone else has tried mod_pagespeed and whether it provided any performance improvements in OTRS. I have a feeling the answer will be to add more memory/cpu, but every millisecond counts. I was surprised to not find any information about the combo on a Google search. Marty