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That sucks. I'm using d3.js to animate svg elements, runs smoothly on my machine, what browser/os are you on?

FF Nightly on Windows, I also checked on my laptop running Linux and the same thing happens so I guess it's related to the browser specifically.

Yep, I can reproduce it on OS X with FF 42.0 as well. Going to see if i can find what's causing the low framerate.

On Ubuntu it's fast in Chrome and slow in Firefox.