Off Draw calls

Hi everyone, update from what I had done. I had followed the instruction and set variable_dt off and the vsync swap interval to 0, but the framerate is still not respecting what it’s ought to be. So I used os.clock() offset to get the dt for the time being. But apparently, my server will still crash after a short period of running. In fact, is faster than when it’s not in headless build. I probably could blame the server’s specification for the crash but can’t be that bad?

This is the VM I am using and nothing else is running except the application. Any advice? Thanks for the help.