873551 - Heavily transformed images in SVG's causing performance issues (choppy scrolling)

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect)

Description

[Ben Aiken]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.65 Safari/537.31

Steps to reproduce:

Scrolling around on a page with a very large image (6000px x 6000px, 54dpi) that is scaled down causes choppy scrolling. 


Actual results:

The browser window stutters immensely.


Expected results:

There shouldn't be chopping scrolling.

Comment 1

[Ben Aiken]

Per request from Robert O'Callahan, this bug has been created as a clone of Bug 865546. While Bug 865546's fix helps performance, it still has some issues.

Need to profile and attach results.

Comment 2

[Ben Aiken]

I'm actually having trouble profiling for any build 2013-01-18 and after. I had someone else on my team confirm the same thing. When I "Stop" the profiling, the profiling data shows up briefly and then almost immediately disappears. 

I am going to attach a video of this happening.

Comment 3

[Ben Aiken]

Attachment: Testcase for performance issues

Comment 4

[Ben Aiken]

Attachment: Video of profiler breaking in 2013-01-18 builds and beyond

Comment 5

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Did you install the latest profiler XPI from here? https://github.com/bgirard/Gecko-Profiler-Addon/raw/master/geckoprofiler.xpi

Comment 6

[Ben Aiken]

(In reply to Robert O'Callahan (:roc) (Mozilla Corporation) from comment #5)
> Did you install the latest profiler XPI from here?
> https://github.com/bgirard/Gecko-Profiler-Addon/raw/master/geckoprofiler.xpi

Thanks for this - I'll give it a try and report back later today.

Comment 7

[Jonathan Watt [:jwatt]]

Performance seems to have gotten a lot better between 2013-05-09-03-10-47-mozilla-central and 2013-05-10-04-16-06-mozilla-central.

https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=ea059733677c&tochange=08be63954b6b

Comment 8

[Jonathan Watt [:jwatt]]

And in latest Nightly it seems to be even better yet.

Comment 9

[Ben Aiken]

Okay great. I will give it a try and report back. Haven't gotten a chance to do profiling on my side but will be pushing things around in my schedule to do that today. I'll also take a look at the latest nightly and see how that performs.

Thanks!

Comment 10

[Ben Aiken]

While the performance isn't 100% of what it was before, we've also implemented some enhancements that negate the performance loss. Because of this, I'm comfortable marking this one as resolved and will reopen a new issue if the performance issues resurface. Thanks!