> On Nov 16, 2017, at 17:36, Robby Findler <ro...@eecs.northwestern.edu> wrote:
> Dragging and IO could easily be different things. For IO, when I run
> this program with a git build from 9 days ago, I don't see any
> freezing (up to 1,000 lines). Do you?
> #lang racket
> (let loop ([n 0])
> (printf "~a ~a\n"
> (make-string 100 (integer->char (+ 97 (modulo n 26)))))
> (loop (+ n 1)))
Nope, looks fine.
I’ve started trying to do a quick git bisect, and as I suspected, you can’t
just check out the v6.11 tag and run ‘make’, since (IIUC) the make process
pulls the latest versions of all of the packages, including some that depend on
changes made after the 6.11 release (in particular, the gui
library…foreshadowing). In order to build, then, it appears to me that you have
to simultaneously bisect on all of the related libraries. Is there a mechanized
way to handle this? The snapshots would be useful here, but they only go back
four days (IIUC).
Re: foreshadowing: the change to the gui library is interesting because the
problem I’m observing is clearly gui-related; I think I’m going to try turning
the clock backward on the gui library.
> On Thu, Nov 16, 2017 at 5:55 PM, 'John Clements' via Racket Users
> <firstname.lastname@example.org> wrote:
>> Since the release of 6.11, it appears there’s been a major major performance
>> regression in the display of 3d plots in the interactions window.
>> To see this, try running this program (from the plot docs), then try to drag
>> the image around.
>> On a fresh download of the snapshot, dragging is unusable; you can click and
>> drag, but all you’ll see is frantic GC. Sometimes, after releasing the
>> handle, the display updates. This problem does not appear to be present in
>> the released version of 6.11.
>> Also, FWIW, this is running OS X High Sierra, just upgraded about a week ago.
>> Also possibly related; I’ve been having serious trouble running programs
>> that display long (200-300 lines) blocks of text in the interactions window.
>> I’ll see (say) twelve and a half lines of purple output, then wait for three
>> seconds, then another few lines of output, wait a few seconds, etc. etc.
>> I’d be happy to submit this as a github issue…would it go into the
>> racket/drracket repo, or the racket/racket repo?
>> #lang racket
>> (require plot)
>> (require (only-in plot/utils bounds->intervals linear-seq))
>> (define (norm2 x y) (exp (* -1/2 (+ (sqr (- x 5)) (sqr y)))))
>> (define x-ivls (bounds->intervals (linear-seq 2 8 16)))
>> (define y-ivls (bounds->intervals (linear-seq -5 5 16)))
>> (define x-mids (linear-seq 2 8 15 #:start? #f #:end? #f))
>> (define y-mids (linear-seq -5 5 15 #:start? #f #:end? #f))
>> (plot3d (rectangles3d (append*
>> (for/list ([y-ivl (in-list y-ivls)]
>> [y (in-list y-mids)])
>> (for/list ([x-ivl (in-list x-ivls)]
>> [x (in-list x-mids)])
>> (define z (norm2 x y))
>> (vector x-ivl y-ivl (ivl 0 z)))))
>> #:alpha 3/4
>> #:label "Appx. 2D Normal”))
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