I just using w3 total cache plugin to speedup my website. It works great in many ways like page caching, db caching, object caching, js&css minification and also it reduces time taken for FBR(first byte request).
But when i checking pagespeed test in tools.pingdom.com, It shows some unwanted url(www.mydomain.com/?_wpcf7_is_ajax_call=1&_wpcf7=63) taking too much to complete the request affecting the performance. And when i deactivated w3 cache plugin that unwanted url dissappeared. I know the cause of this issue - Because of the usage of contactform7 plugin with ajax call. I just want w3 totalcache to eliminate caching contactform7 used in my homepage.
I tried the following w3 pagecache tab-> advanced settings:
but no use.