Then "the Pure Nexus Project" ROM is one with a ton of features, it's bugfree, at least for me, and it's the smoothest. Believe me, I tried them all and this is hands down, the smoothest of all. I remember seeing somewhere in the description, something saying that the "scrolling performance" has been tweaked and improved, so I bet that's the thing that makes it smooth. Try it cause you won't regret it.
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