Display data in CRM Max 30 sec using CRM form custom button click

Hello,

Record Count : Max 5000 in one single call.

I want to display record within 30 second in CRM form when custom button click.

Please suggest me if have any possible way to do it.

I have no concern if data not addedd in CRM. I just want show data when CRM form custom button click.

Thanks,

keyur shah