JHCMIBH43.0 uses zRAM to improve it's RAM management as well. It will use more CPU power for the compression process, so we will see if would affect battery power. Will post up screenshots later.
JHCMIBH43.0 Recovery ROM can be downloaded here. (credit goes to KateZ on the MIUI forums).
For those who needs a fresh and clean install of the update, you can download Fastboot ROMs.You'll need Mi Flash Tool, a PC and the fastboot ROM.
Download Malaysia fastboot rom
Download Singapore fastboot rom
Download Indonesia fastboot rom
Download Philipines fastboot rom
zRAM info.
My own experience
Overall battery consumption has definitely increased on this version because of the zRAM implementation. Multi-tasking is not a problem anymore. And the phone seems to heat up less and noticeable when playing games. Apps and UI is not as snappy compared to version 37.