The most recent firmware update (200828) was recalled 4 days after release, but I'm not aware of any updates, recent or past, related to performance.
The current release (200702) has been reported to be working fine via RTSP with Surveillance Station by others. Ditto for my Dahua NVR recording the AD110 24x7 in full HD - no problem at all. A good AD110 Wi-Fi connection of course plays a big part of that.
You might also be interested in the script
@pcabral wrote that enables Surveillance Station to subscribe to AD110 doorbell motion (AlarmLocal) events. It could also be fairly easily updated to subscribe to doorbell button push events (_DoTalkAction_ Invite). See his post here:
https://amcrest.com/forum/amcrest-smart ... tml#p32585