363157 - Forms select items are too slow

Status: RESOLVED WORKSFORME

(Core :: Layout, defect)

Description

[atimmer]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; nl; rv:1.8.1) Gecko/20061010 Firefox/2.0
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; nl; rv:1.8.1) Gecko/20061010 Firefox/2.0

Use page with 1000 select items.

Loads in IE6 on windows 2000 in 40s.
Loads in Firefox 1.5 on windows 2000 in 90s or more.

Loads in IE6 on windows XP in 8s!!!!!!!!!!
Loads in Firefox 2 on XP in 90s or more.

For a select with option yes and option no a checkbox can be used as a test.
Did this, page is fast again.
So it's the select item that specifically causes the problem.


Reproducible: Always

Steps to Reproduce:
1. I have an example page where can this be uploaded?
2. Create page with a form, a table with 1000 rows and in every row a select list with 2 options.
3. Load page into browser and time this.

Actual Results:  
See details.

Expected Results:  
Same performance as IE on windows2000 and XP.

Comment 1

[Ria Klaassen (not reading all bugmail)]

Related to / dupe of Bug 352367 ?

Comment 2

[atimmer]

Attachment: Page with lots of select items.

Comment 3

[atimmer]

Loads in IE6 on windows XP in 8s!!!!!!!!!!
must be
Loads in IE7 on windows XP in 8s!!!!!!!!!!

Comment 4

[atimmer]

Ria, yes it's related to Bug 352367.
But's it also somewhat different because here SELECT-items are specifically blamed / they need extra attention.

Comment 5

[Ria Klaassen (not reading all bugmail)]

It loads slowly in Firefox 2.0 indeed (about 100 seconds here) but it has improved a lot in the latest trunk build: about 27 seconds.

You can try it out: http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/

Comment 6

[atimmer]

Attachment: A different test case.

Contains table with 16 rows.
Make this at least 80 by doing some copying.

Comment 7

[atimmer]

The nightly build works indeed much faster.
And scrolling after page loading works instantly.
You are almost there.

I've uploaded a different testcase with SELECT-list items that has a different performance picture. 

Comment 8

[Steve England [:stevee]]

If this works on trunk --> WORKSFORME?

Comment 9

[Samuel Sidler (old account; do not CC)]

Closing as WORKSFORME per comment 7.