ZRAM

http://en.wikipedia.org/wiki/Zram
http://forum.xda-developers.com/showthread.php?p=34877656#post34877656
https://source.android.com/devices/tech/low-ram.html#zram

With Android, there is no swap partition, and therefore brings ZRAM also no performance boost.
The only thing that brings ZRAM is "more" RAM. Compressed by the "enlarged" so to speak of the available memory. That's on devices with little RAM (less than 256MB) also pretty useful.

[Note] Low RAM
[Note] ro.config.low_ram