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A comment on SSH uses four TCP segments for each character you type. Parent comment

Re:SSH uses four TCP segments for each character you type by ephemient on Thursday May 30, 2013 @05:30PM (#5795367)
Are you thinking of EXTPROC/LINEMODE? There's outstanding patches to bash, telnet, and ssh to support these, which enables local line-editing that works smarter than just local echo.

TIOCPKT_IOCTL(EXTPROC) and TIOCSIG support landed in Linux kernel 2.6.36: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux....

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