629330 - Multi-select list is slow to select

Status: RESOLVED WORKSFORME

(Firefox :: General, defect)

Description

[Bruce A. Peebles]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13

When using Shift-Click to select several pages of item in a multi-select list, Firefox takes wayy too long to actually select the items. When I try the same thing in IE, it is instant.

Reproducible: Always

Steps to Reproduce:
1. Open the attached html file
2.Read instructions on screen
3.

Comment 1

[Bruce A. Peebles]

Attachment: Html file which clearly reproduces the problem

The instructions are in the HTML file and are visible when opened in browser.

Comment 2

[Bruce A. Peebles]

NOTE: I have searched other bugs for FireFox and this may be related to bug#466012

Comment 3

[Maniac Vlad Florin (:vladmaniac)]

This works for me for build ID: 

Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13

Comment 4

[AndreiD[QA]]

WFM on Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 (.NET CLR 3.5.30729)

Comment 5

[Maniac Vlad Florin (:vladmaniac)]

Setting this as WFM due to comments. If someone can reproduce this, please reopen

Comment 6

[Bruce A. Peebles]

Did you try to use Shift-click to select ALL the items in the list? (must scroll to the bottom)
Did you try both FireFox and IE?

The difference is apparent.... Under *real* use when the list of items may have thousands of entries, each of which are around 15 characters long, the amount of time FireFox takes to select all the options may be over a minute. (while IE is instant!)

Comment 7

[Maniac Vlad Florin (:vladmaniac)]

You are right. It's very slow, but if selecting ALL items, to be specific. 
Thanks for your follow - up

Comment 8

[Bruce A. Peebles]

Let me also explain how this is being used,

An HTML page has 2 of these select-lists side-by-side.
The left select-list displays the full name of thousands of people.

The users of this webpage are supposed to select names in the left list and push a button to add them to the right-hand list. (JavaScript moves the selected names to the right-hand list)

The problem is that when the users try to multi-select thousands of names using the FireFox browser, it takes over a minute to just do the select action.

Comment 9

[Bruce A. Peebles]

I am reopening now that the problem is better understood.

Comment 10

[Bruce A. Peebles]

I am involved in characterizing the performance "Firefox ESR" edition.

During my testing, I noted that the issue which I brought forth in this bugzilla is no longer a problem. Apparently, this was addressed somewhere between FF 3.6 and 10

Setting this bug to RESOLVED-WORKSFORME