How to speed up certificate map entry activation?

[realnice]

We currently are adding self-managed SSL certificates to a certificate map by adding an entry, but it takes a few minutes before that entry goes from status "PENDING" to "ACTIVE". Is there any approach that would speed up that process? We want timing to go down below 10 seconds ideally. I thought maybe I could create an entry early and then update it, but you can't seem to update hostname after an entry has been created, and you can only attach a certificate with the hostname. 

Any ideas? We have a system essentially where users point their domains to our load balancer, and then we generate an SSL cert. A few minutes is a long time for users to wait, so we're trying to make it faster. 

[realnice]

UPDATE: I tried creating the map entry with a self-signed certificate, and then updating the certificate with one signed by a CA, but that still took 1-2 min to resolve.