Adding the -vulkanpresentmode=0 argument to UE4Editor to force the present mode to VK_PRESENT_MODE_IMMEDIATE_KHR for the menus did not affect the performance at all (I am verifying the command line flag does take and the mode was changed)
Adding the -vulkanpresentmode=0 argument to UE4Editor to force the present mode to VK_PRESENT_MODE_IMMEDIATE_KHR for the menus did not affect the performance at all (I am verifying the command line flag does take and the mode was changed)