Hi,
I am Saravanakumar from India, having three years of experience in the ColdFusion development. I've strong knowledge and work experience on the ColdFusion web development using ACF and Lucee
I had an amazing work experience in the JQuery, JavaScript, bootstrap and etc, I hope it will help you for the ajax issue.
For the page loading issue I guess the cfm page could have the lots of query and I'm not whether you're using any framework or not, so if possible please share that details then we can move forward.
Thanks,
Saravana