First, The Performance Test
I tested the Hummingbird Pro but it dosn't give me good load time. So I decide to replace with Swift Performance Lite. The result is better decreased by 5s.
but result still not good and CPU benchmarking in Swift said it is not good.
This is the result: https://gtmetrix.com/reports/testing-this.wpmudev.host/5UUL7XrF
Fully Loaded Time should be under 3s.
Seconed, How can I manage cron I prefer to disable Wordpress cron and enable in server level.
Third, any news about subdomains with WPMU