for reference: I'm running Ubuntu 10.10 on a quad core, 2.6.35-22-generic 1. This is not an issue with select. This is an issue with the low_latency pty stuff that Simon mentioned. I tested this by modifying pexpect to use true nonblocking io (ie set the child_fd to O_NONBLOCK, and then just read() and ignore EAGAIN), and there still was a delay before read would return something other than EAGAIN.
2. There's nothing wrong with the singular interface. 3. Possible fix: for singular and gap (and anything else that doesn't need a full tty, ie doesn't use fancy screen stuff like top), perhaps we should use subprocess.Popen(... stdout=PIPE, stdin=PIPE, stderr=PIPE) and then communicate through the pipes. There shouldn't be any latency. I'm currently modifying pexpect to do this and will report my findings. - Alex -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
