421358 - scaling svg graphic via full page zoom is painfully slow

Status: RESOLVED WORKSFORME

(Core :: SVG, defect)

Description

[Asa Dotzler [:asa]]

http://people.mozilla.com/~vladimir/misc/branch-moz2.svg

Scaling this svg graphic using Firefox 3 (nightly on 10.5) full page zoom is painfully slow. 

Filters?

Comment 1

[Asa Dotzler [:asa]]

It gets progressively worse as the zoom factor goes up. For me the first zoom factor takes about one second and the forth zoom factor takes about 5 or 6 seconds.

Filter size going up is apparently to blame (according to vlad and shaver's suggestions on IRC)

Comment 2

[Robert Longson [:longsonr]]

It is filters, Gaussian Blur is probably the main problem in this case. 

You have a gaussian blur on alpha only which could be done faster and when you zoom we calculate even the bits of the filters that are now off-screen.

Comment 3

[Robert Longson [:longsonr]]

I think vlad's removed the filters so I can't check whether roc's latest updates would have fixed it.