Summary:
Now that pre-allocation of views update props, we can just force the execution of "pre-allocation" instead of "create" mount item.
This diff adds systraces to the execution of pre-mountItems during commit
This should reduce the amount of mountItems that are created during commit phase.
This should improve TTI (I'm running a MobileLab)
Reviewed By: shergin
Differential Revision: D14297478
fbshipit-source-id: d8e515d34cf6edacce53c0903f74a08029259f6f