I thought rootfs was silly fast, why would an SD be faster to swap? I know there's less noise on the SD, but does it make that much of a difference? Also, does anyone how fast the rootfs REALLY is? I can't bench it.

Could someone who knows about this, cat some random into the root fs for a second, see how much is in there? Maybe read a large file to null?

Also, deprecated, how much does your free RAM hover around with the swappiness altered? I've been wanting to do this for a while, the device is swapping like a nutcase.