We will be doing another build tomorrow that will include additional steps to address the lag.
During yesterdays stream we mentioned we were aware of performance issues (lag) and were working on addressing them. In order to keep builds as risk-free as possible, we are spacing out performance fixes over several patches. Tomorrow's build will include one of the fixes to address lag spikes and we are aiming to include additional fixes in subsequent builds. These fixes will be noted in patch notes under Performance and Stability.