Very long wait opening certain *.R files, Mac R 2.5.0

On Jun 28, 2007, at 5:10 PM, Douglas Bates wrote:

On 6/28/07, Matthew Keller <mckellercran at gmail.com> wrote:

Hi all,

I'm a recent convert, still trying to get used to this new OS. I
use R
everyday for my work.

I have a new Intel MacBook Pro, and installed R 2.5.0. Using the GUI,
when I try to open a large *.R script (from File -> Open or by double
clicking the file), it takes about 1-2 minutes to open. The script is
about 3000 lines long and there are very long and nested loops in it.
Files that are shorter open increasingly quickly, so this behavior
seems to be a function of script length. Still, it takes a text
editor
less than a second to open the 3000 lines long file.

Does anyone have any ideas on what might be causing this? Does the
Mac
version of R run some kind of code automatically when script files
are
opened? Thanks in advance...

Perhaps Simon inserted code in the GUI to cause the delay, as a subtle
hint that 3000 line R scripts with very long and nested loops are to
be discouraged.  :-)

True - maybe I should have added the message as well so the hint not
as subtle ;).

Anyway, it's the syntax highlighting which runs synchronously on open
and can be slow for long documents. I'm experimenting with
asynchronous sh for the new GUI which should remedy this issue. As
Rob noted, temporary remedy is to disable syntax highlighting for
such documents.

Cheers,
Simon