chromium - Why would Chrome cap frame rate at 30fps? -

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i'm doing d3.js visualization development (mostly svg) , measuring fps of transitions using "show fps meter" option in web tools. strangely, fps appears capped @ 30fps. other colleagues using same version of chrome consistently 60fps running same code.

i can higher frame rate out of other browsers , out of flash seems chrome specific.

does know kinds of things might cause chrome clamp frame rate @ 30fps? i've read might if thinks smooth 30fps better choppy 60fps if there lot of variance, don't understand why need on fast desktop machine.

here's example page shows problem:

http://mbostock.github.io/d3/talk/20111018/collision.html

drag mouse around , you'll see fps counter sit around 60fps. on machine, sits @ precisely 30fps.

i've tried canary same results.


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