Re: Fix for slow process output processing (please test).

[storm@cua.dk (Kim F. Storm)]

Eric Hanchrow <offby1@blarg.net> writes:

> >>>>> "Kim" == Kim F Storm <no-spam@cua.dk> writes:
> 
>     Kim> David Kastrup and others have reported very slow processing
>     Kim> of process output, particularly with the Linux kernel's
>     Kim> scheduler giving emacs too much attention while starving the
>     Kim> processing producing the output.
> 
>     Kim> Below is a patch
> 
> ...
> 
> I've noticed that shell-mode on very recent (i.e., since after New
> Year's) versions of CVS Emacs on Windows is quite slow, and the CPU
> usage is high, for a second or two after I hit RET
> (comint-send-input).  I haven't yet investigated, but if this sounds
> like it might be related to your patch (which I think, but cannot
> right now confirm, is present on the Emacs in question), let me know
> if I can give you any more information.

Does the problem go away if you do

        M-: (setq process-adaptive-read-buffering nil) RET

before starting shell-mode ?

I suppose that process-adaptive-read-buffering isn't really needed on Windows,
so we could just turn it off in lisp/term/w32-win.el.

-- 
Kim F. Storm <storm@cua.dk> http://www.cua.dk