Hi Nick, I used tcpdump on port 4822 with guacd to capture packets and intercepted the Guacamole protocol messages.
In my tests, receiving the mouse click message would be followed by sending the image update message, then I calculated the interval between the two messages. Since the interval is for the round trip, I further reduced the 15ms app time and got the “latency” I mentioned in previous mail. The 150ms latency seems a little bit too high, but the overall user experience is pretty good, no noticeable lag. Thanks, Yang On Jan 21, 2025, at 19:40, Nick Couchman <[email protected]> wrote: On Tue, Jan 21, 2025 at 4:35 AM Yang Yang <[email protected]> wrote: > Hello, > > I am looking to get the latency overhead of using guacamole, could you help > to share if there is any reference I can look into? > > I created a simple app, presenting a 600x600 box changing to a random color > on very click with 15ms delay, and then captured the guacd mesages for the > session. I had tests serving the app through VNC on Ubuntu and RDP on > Windows, and the latency from guacd, along with VNC and RDP processing, was > about 150ms. > Can you clarify what this latency is a measure of? What guacd messages are you capturing? Does this mean the log messages (put guacd in trace mode and capture the trace message)? Or are you actually doing a packet capture and intercepting the Guacamole protocol messages? Or RDP/VNC protocol messages? The 150ms is being measured where, and between which two events *exaclty*? > Is the 150ms from my tests typical? Is there anything specific I can do to > reduce it? My network is quit good, the latency on network is <30ms and > bandwidth would be not an issue. > That seems quite high to me - I use Guacamole on a daily basis for managing remote systems (mainly RDP) over a VPN (Zscaler), and 150ms latency (again, depending on what that actually means) seems like it would be quite noticeable when trying to interact with a remote session. -Nick
