I was curious to get any information regarding TA and SP fields in the VRApi logcat ? Is it related to thread affinity as well?
When we build our project using Unity 5.4.2 we have the following log FPS=54,Prd=47ms,Tear=0,Early=18,Stale=5,VSnc=1,Lat=1,CPU2/GPU=2/2,1113/315MHz,OC=F,TA=C/0/C/C,SP=F/N/F/F,Mem=1017MHz,Free=990MB,PSM=0,PLS=0,Temp=32.0C/30.0C
and using Unity 5.6.2 we have FPS=45,Prd=45ms,Tear=0,Early=1,Stale=19,VSnc=1,Lat=1,CPU2/GPU=2/2,1113/315MHz,OC=F,TA=C/0/0/0,SP=F/N/N/N,Mem=1017MHz,Free=1005MB,PSM=0,PLS=0,Temp=29.3C/30.0C
Both logs are taken from the Galaxy S7. The Galaxy S6/Note 5 work fine even after the upgrade.
Same issue for me. S7 performance is much worse in 5.6 and 2017.1, other devices like S6 and Note 5 unaffected. Please report back if you manage to resolve the issue!