1036918 - CSS image base64 + background-size - two or more copies -> loading the CPU x2-x10

Status: RESOLVED WORKSFORME

(Core :: XUL, defect)

Description

[BaNru]

Attachment: firefox_img_base64_load_cpu

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:30.0) Gecko/20100101 Firefox/30.0 (Beta/Release)
Build ID: 20140608211622

Steps to reproduce:

http://jsfiddle.net/BaNru/JZnNZ/

CSS image base64 two or more copies
and always different background-size

After a full load the page in a peaceful state
And you can see pictures

CPU Intel Core i7


Linux Ubuntu 64 + FF30
CPU load x6-x10
other pages 0-1% CPU
page of img-base64 (demo) - 6-10%

Win8 + FF30 (VirtualBox)
CPU load x2-x3
other pages 1-3% CPU
page of img-base64 (demo) - 3-6%


If 1+ various images and background-size change once (no more), the load on the CPU is not present.

Comment 1

[[:Aleksej]]

Is this still happening?  See bug 1006353.

Comment 2

[BaNru]

Example of bug 1006353
http://jsfiddle.net/BaNru/3aojahs4/
http://download.g63.ru/ff_bug/FF_cpu_from_1006353.png
(other page | example page)

My example is not changed
http://download.g63.ru/ff_bug/FF_cpu_bug.png

xUbuntu 64 FF32
Which version fixes?


AND see other bug from example 1006353 (http://jsfiddle.net/BaNru/3aojahs4/)
http://download.g63.ru/ff_bug/FF_cpu_1006353.gif

Comment 3

[[:Aleksej]]

(In reply to BaNru from comment #2)
> xUbuntu 64 FF32
> Which version fixes?

35 (Nightly).  You can get a latest one from https://nightly.mozilla.org/, and earlier ones from https://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/ (mozilla-central).

Comment 4

[BaNru]

Sorry for the long answer.
FF39 (stable) and 41.0a1 (2015-05-13) - so good

Thread can be closed.

Thanks!