The initial connection to CRM online is very slow

Hi all,

I have a web portal connects to CRM online. When the portal user first logins, it takes 30-50 seconds to read the entity data from CRM. but the second time is fast (I think it is cache in web server/client side).

I don't know why it takes so long to connect to CRM online first time. maybe need to wake up CRM? download Cache Data.

How can I speed up that?

Thanks.