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Re: feature request: efficient support for dynamic GNU Screen window tit
Re: feature request: efficient support for dynamic GNU Screen window titles
Mon, 30 Apr 2007 09:04:38 +0900
"Trent Buck" <address@hidden> writes:
> Unfortunately, this means that every time ANY command is run, Emacs
> prints a string to the controlling terminal. For example, with the
> above hook in place, copying a paragraph of text from another Screen
> window into Emacs' window is significantly slower and produces lots of
> flicker. On my 1.6GHz Sempron system, it's UNUSABLY slow.
Of course it would be nice to have a more elegant method, but I suspect
your method could be sped up a lot by keeping track of the last string
you sent to the terminal, and only sending again when it changes.
(defvar last-sent-frame-title nil)
(when (and (null window-system)
(string-match "\\`screen" (getenv "TERM")))
(let ((title (format-mode-line frame-title-format)))
(unless (equal title last-sent-frame-title)
(send-string-to-terminal (concat "\ek" title "\e\\"))
(setq last-sent-frame-title title))))))
This still incurs the overhead of `format-mode-line', but at least it
avoids the actual I/O (which I expect is the main cause of slowness).
We are all lying in the gutter, but some of us are looking at the stars.
- Re: feature request: efficient support for dynamic GNU Screen window titles,
Miles Bader <=