90097 - Drag and drop with remote X excrutiatingly slow

Status: RESOLVED DUPLICATE of bug 86138

(Core :: DOM: Selection, defect)

Description

[Peter Davis]

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.2+) Gecko/20010709
BuildID:    2001070908

(I originally found this bug trying to drag folders in MailNews, but it seems to
apply to dragging in other components as well).  When dragging a folder, text,
link, etc. over a Remote X11 connection, the little "paper" mouse icon that is
dragged is appearantly redrawn far too many times, resulting in up to five
MINUTES of lag while the gesture is completed.

Reproducible: Most of the time
Steps to Reproduce:
1. Open mozilla over a remote X connection.
2. The easiest way is to open MailNews.
3. Drag one of your folders into another folder.  Most of the time, especially
if you move the mouse around a lot before releasing the drag, the little paper
icon will begin redrawing itself over and over.
4. Go grab a cup of coffee and come back later.

Actual Results:  It appears as though the icon is being drawn at every
mouse-move event, so if I move the mouse very slowly, the paper will be drawn
over and over very close together; if I move it quickly, the paper follows the
mouse at large intervals, etc.  All this redrawing is a bitch on my X
connection, and all my other remote apps also become useless as all the
bandwidth is used up.

Expected Results:  The icon should only be drawn at a set interval, or should
use a more efficient method (like changing the mouse pointer instead of
following the mouse).

My X connection is over ~200kbYte AT&T cable w/ a ping time to the server of
approx. 50ms.  However, everything else works with minimal lag.

Comment 1

[Peter Davis]

Attachment: photo of the paper icon being redrawn - note that usually it is redrawn MUCH more than this (it was hard to time the shot)

Comment 2

[Boris Zbarsky [:bzbarsky]]

Duplicate of "Too much network traffic on drag and drop ( use pointer service
instead of XQueryTree to figure out the target of DND )"

*** This bug has been marked as a duplicate of 86138 ***