998960 - Lack of performance loading big pages

Status: RESOLVED WORKSFORME

(Core :: General, defect)

Description

[[e-mail]]

User Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0 (Beta/Release)
Build ID: 20140314220517

Steps to reproduce:

Open this page : http://pastebin.com/EuxZMbWT


Actual results:

It takes up to 2 minutes to load and firefox is hanging all along.
Tested with and without addons and/or hardware acceleration, doesn't change anything.


Expected results:

In other browsers like Chrome or Ie, we can continue browsing while it's loading in background and it takes less than 20 seconds to fully load.

Comment 1

[Bogdan Maris, Desktop Test Engineering]

Latest Nightly (30-40 sec) loads the page slower than Chrome (20 sec) but it does hang while loading.
Tested using Windows 7 32bit and on a Surface Pro2 Windows 8.1 64bit.

Comment 2

[William Schlitz]

Hanged(hung?) for about 30-ish seconds on 2011 MBA running FF 29.

Build: 20140421221237
UserAgent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:29.0) Gecko/20100101 Firefox/29.0

Comment 3

[Boris Zbarsky [:bzbarsky]]

So using this testcase:

data:text/html,<script>var%20start%20=%20new%20Date;%20onload=function()%20{%20alert(new%20Date%20-%20start)%20}</script><iframe%20style="height:%20100%;%20width:%20100%"%20src="http://pastebin.com/EuxZMbWT"></iframe>

I see the following times on Mac:

Current nightly: 11.6s
Chrome: 20.5s
Safari: 17.4s

Both Chrome and Safari respond to events a bit better than we do during the load, but not much; I can't really scroll the page while it's loading in either one, for example, because the process that's loading that page is completely swamped.

Profile shows all the time is being sent in reflow, not surprisingly.

What's interesting to me is that the original report says we're slower to load the page, but I'm seeing us be _faster_ to load.   Windows vs Mac issue?

Comment 4

[[e-mail]]

Or maybe nightly' speed ups ?
The first post was made using Firefox 28 but with 29 it's already much more faster.
Besides if you're gonna use this test url for benchmarks maybe you should do a copy of it 'cause it's not mine and will probably be edited (deleted?) with time.

Comment 5

[[e-mail]]

Another example : http://www.warparadise.com/contenu/avatar/
I've tried for several minutes and it never opened.

Comment 7

[Gregory Pappas [:gregp]]

Unable to reproduce. Please file a new bug if you are still experiencing this issue.