1031879 - Performance on Mockingbird is very poor

Status: NEW

(Firefox :: General, defect)

Description

[Saurabh Anand [:sawrubh]]

Attachment: about:support output on Nightly

STR:
* Open http://gomockingbird.com/, click on 'Try it now'.
* Start a project, add multiple items to it, like text boxes, buttons, boxes.
* Select multiple such items and move them around by dragging, or simply do other operations on the website which involves multiple moves or dragging around.

What happens:
The operations are visibly very laggy and don't feel responsive in Nightly. I tried the same website and the same number of objects in a project and tried to interact and it was much much more smoother in Chrome. This probably has to do with the graphics than with the JS perf.

What should happen:
Performance on Nightly should be good.

CC'ing Yoric as he was on the perf team and might know which component this belongs to or whose attention to get here.