I have been struggling with the latest stable Cyanogen-mod(CM11) ROM for a while on the I9000, it was buggy, luggy and had poor battery life. I just flushed a KitKat ROM by a recognized XDA developer kasper_h, The Mackay ROM 4.9.13 (11-Oct-2014). This ROM is based on CyanogenMod sources, with several performance enhancements including a customized kernel with some optimization features.
- Charge the phone to 100% (always safe)
- Connect the phone to computer and copy the ROM and GAPPS to SD card
- Power down
- Boot into recovery I had CWM (CM10.2)
- Wipe things (factory reset, wipe Dalvick Cache)
- install ROM from SD card
- Install GAPPS
Some available tweaks:
This ROM comes with a Mackay kernel which has some extra features accessible through the Mackay settings app. I found the following useful
- RAM settings: requires reboot, for low RAM mode activation
- Screen off power mode: for disabling wifi when device screen is off
My one day experience is that the ROM is very fast, battery life is much better and no reboots or lugging of any kind. Tested a few games, it runs pretty smooth.
There are also performance settings under the general settings for adjusting the processor speeds and scheduler, plus you can enable developer options and disable animations for a faster run with lower CPU speed settings for longer battery life.
stable performance settings:
Processor: CPU governer = LULZACTIVE
Processor: Maximum CPU frequency = 1200 MHz
I/O scheduler: I/O scheduler = ROW
Other combinations I tried ended up causing soft reboots.
I also tried ART vs Dalvik and the results of normal use were almost the same. I guess with less than 512Mb of RAM, meh!!…