You will have to do a lot of fine tuning to get rid of most of the lag with a Class 4 card. A better choice would be a Class 6 (or perhaps Class 10, but not UHS) and selecting DataOnEXT installation.
I've just upgraded from Tytung Gingerbread, and have significant lags....application launch and button responses are very noticeably slow in comparison to Gingerbread....I've used SD speed increase and set that to 4096, but no real impact. I've seen stuff on Min Free but seems rather old and don't know if it is still relevant to 4.3/10.2
Can you help point me at how to tune to get rid of or reduce the lag....I don't understand why my HD2 performance would be poor when others are OK...
NAND was partitioned with a 200m system partition, but can't see how that matters given I am Native SD
Tytung JB v3.3 installed as Native SD, with "wipe"
class 6 32Gb SD card, brand new, partitioned with 5gb ext4 rest as FAT32
(I did think about trying dataonext but last time I repartitioned I got the "fatal hit 1" problem in MAGLDR which I managed to resolve with the "go back to WM and hit reset button method, but I am rather paranoid that repartitioning may not be safe anymore and I don't want to end up with another Fatal hit 1 which I might not get resolved this time - it seems a bit random from my reading!)
any hints or links appreciated.