185264 - mouse scrolling is slow on form SELECT objects with large # of OPTIONs

Status: RESOLVED INCOMPLETE

(Core :: Layout: Form Controls, defect)

Description

[jonathan hunsberger]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20021130
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3a) Gecko/20021213

See http://www.mindspring.com/~noelann/test.html (most dramatic, 19000 OPTIONS
in SELECT) and http://www.mindspring.com/~noelann/test1.html (only 10000 OPTIONS
in SELECT).  Mouse scrolling is slow for test.html and unusable for test1.html.
 Keyboard scrolling (typing in

Reproducible: Always

Steps to Reproduce:
1. Go to http://www.mindspring.com/~noelann/test.html
2. Click on form arrow.
3. Wait for drop-down list to display.
4. Quickly drag scroll "handle" halfway down
5. Wait for display to catch up
6. Drag up and down to repeat



Actual Results:  
There was a long pause (multiple seconds) before rendering the proper portion of
the list.  During this pause i could not click on other elements with my mouse
(such as switching to another workspace in KDE).

Expected Results:  
Scrolling should have nearly instantaneous feedback.

Happens in both Modern and Classic themes.  
Also tested with: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20021130

Comment 1

[Andrew Schultz]

yes, the performance is not great, but is 10k options really practical?

also, with a CVS gtk2 build, scrolling is lightning fast, even on test.html

Comment 2

[John Keiser (jkeiser)]

Instantaneous for me as well, on 2002121308.

Comment 3

[Jesiah S]

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3b) Gecko/20030119
One my machine it takes about 2500-5000 options to make the select barely usable
(with BugAThon, a Bug list, and this page in the other tabs).

PII400 192MB RAM 

comparison:
Konqueror (KDE 3.1rc5) was able to show a quarter of a million options after you
click the drop down button in ~20s. At a half a million options it took almost a
minute to show the select. Besides the loading time both were very usable.

Comment 4

[Jo Hermans]

For comparison: this work pretty well on Mac OS X 10.2.8, even on a slow 300 MHz
iBook without video acceleration. The drop-down lasted 3 seconds, but scrolling
was fast enough, with an occasional 'hickup' of maybe 0.2 second (seem like
context switching, or maybe the GC). I don't see the need to try to optimize
this further, especially for borderline cases like this one.

Comment 5

[Gervase Markham [:gerv]]

This is an automated message, with ID "auto-resolve01".

This bug has had no comments for a long time. Statistically, we have found that
bug reports that have not been confirmed by a second user after three months are
highly unlikely to be the source of a fix to the code.

While your input is very important to us, our resources are limited and so we
are asking for your help in focussing our efforts. If you can still reproduce
this problem in the latest version of the product (see below for how to obtain a
copy) or, for feature requests, if it's not present in the latest version and
you still believe we should implement it, please visit the URL of this bug
(given at the top of this mail) and add a comment to that effect, giving more
reproduction information if you have it.

If it is not a problem any longer, you need take no action. If this bug is not
changed in any way in the next two weeks, it will be automatically resolved.
Thank you for your help in this matter.

The latest beta releases can be obtained from:
Firefox:     http://www.mozilla.org/projects/firefox/
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Seamonkey:   http://www.mozilla.org/projects/seamonkey/

Comment 6

[Wayne Mery (:wsmwk)]

Do you still see this problem?  ... Using current version of FF (3.0.4), or 3.1 beta - beta 1 at http://www.mozilla.com/en-US/firefox/3.1b1/releasenotes/ ... or beta 2 available soon 

If you no longer see the problem please close the bug.

Comment 7

[Tyler Downer [He/Him]]

@Reporter, we have not heard back from you in a while, so I am closing this bug as INCOMPLETE. You can reopen this bug if more information becomes available. Some helpful information you can provide us is found at http://new.quality.mozilla.org/bug-writing-guidelines.