[R] Mac Yosemite R.app console typing / autorepeat performance

[Bert Gunter]

This clearly should go to the r-sig-mac list, not r-help.

Cheers,
Bert

Bert Gunter
Genentech Nonclinical Biostatistics
(650) 467-7374

"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
Clifford Stoll




On Tue, Jan 13, 2015 at 10:44 AM, David R Forrest <drf at vims.edu> wrote:
> I am having issues with performance in the R.app console on Mac Yosemite / OS X 10.10.1.
>
> 1) While editing commands on the command line, left or right arrow gradually slows within a session from usable rates to rates like 2/second or slower.
>
> 2) Autorepeat works differently for different characters:
>
>   # -> ######################################  repeats normally
>   f -> f                                       single character
>   a -> popup menu of differently-accented ‘a’ characters.
>   arrow keys on an existing command line -> navigate as expected
>
> I’m mostly irritated by the slowing navigation.
>
> On trying to generate a repeatable example, I think it happens from having lots of text in the console window:
>
> # open an R.app session
> # try autorepeating ‘#' across the console line while counting how many seconds it takes.
> # put a lot of output in the window:
> rnorm(100000)
> # Autorepeat ‘#’ for the same number of seconds and see how much of the line is filled.   I get about 1/3 of the film as above.
>
> If I do a couple more rnorm(100000)s, the character insertions get queued up and slower than they typing and autorepeat.
>
> Is there a way to limit the scroll-history of the console buffer?
>
> Dave
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