[ESS] Pause between startup commands
Martin Maechler
maechler at stat.math.ethz.ch
Wed Aug 23 13:42:21 CEST 2006
>>>>> "MM" == Martin Maechler <maechler at stat.math.ethz.ch>
>>>>> on Wed, 23 Aug 2006 11:44:25 +0200 writes:
>>>>> "DavidB" == Brahm, David <David.Brahm at geodecapital.com>
>>>>> on Tue, 22 Aug 2006 15:53:07 -0400 writes:
DavidB> When I start up ESS 5.3.1, I get:
>>> if(!exists("baseenv", mode="function")) baseenv <- function() NULL
DavidB> options(STERM='iESS', editor='emacsclient')
>>> >
DavidB> A little ugly, as the two commands run together.
MM> well, yes,... {we never felt a need to consider a patch,
MM> now that you bring it up with a patch proposal
MM> makes it a different story}
[..........]
MM> and many such cases of lines sent too fast and "> > ..." are
MM> known to happen in similar cases.
MM> I think the reason is that emacs has become too fast :-)
MM> The crucial function is
MM> (ess-eval-linewise .)
MM> defined in lisp/ess-inf.el
MM> and there I think it's (line 1009):
MM> (accept-process-output nil 0 100)
MM> ^^^^^
MM> where the '0 100' means {0 second + 100 milliseconds} which we
MM> wait before continuing anyway.
MM> Of course one could increase the 100 and then maybe get better
MM> "prompt reflectance" in ESS - but I assume it would be for the
MM> cost of slowing down some operations.
MM> In any case, I think we could (and should) make the '100' above
MM> into a new optional argument of (ess-eval-linewise .)
MM> where the arguments defaults to a new customizable variable,
MM> so users can easily experiment.
MM> If anyone has time to provide a patch, please use the source at
MM> https://svn.R-project.org/ESS/trunk/lisp/
MM> Do you want to try?
I've already tried the important part myself and
-- I was wrong --- changing the above '0 100' doesn't change a
thing in normal cases.
Rather it's the part in ( ess-eval-linewise )
that says "... Terrible kludge ..."
and later
;; A kludge to prevent the delay between insert and process output
;; affecting the display. A case for a comint-send-input-hook?
that probably could be tweaked.
But I don't have the time to try getting into this at the
moment.
Martin
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