My client hasn't cancelled their app.probo.ci account yet, so I can see that my PR's are still building on that platform, as well as my new app2.probo.ci account.
Builds on app are completing in 3 minutes, builds on app2 are completing in 8 to 11 minutes. I can't predict what will alter the times - but I can see that it's almost all in database import. app and app2 are both working from the same database export.