@hardcore and supercurio mentioned to me that it will depend on samsung on the source codes. Looking at the trend, the last release was for JPM and then no more, JPO/JPA was based on JPM as well.
And with JPU as a totally different breed, recompilation of the kernel is impossible, and except configuration tweaking and tuning, nothing major can be improved at the kernel level. So far, none of the existing kernel without filesystem tweaking can beat JPU, JPU kernel is almost perfect, a 50% jump from the JPM-based kernel, not even the mods in XDA can beat that.

welcome to the stock JPU world,

you like it    it feel just like having sex with the women in your avatar right 

watch out for the gallery bug, im trying to deodex the rom and zipalign it myself...

dont want to use the roms, who knows what they did to the rom actually

i reflashed back to jg4 through the first post ... n wanted to upgrade to dxjpa through kies... bt it says this device's version cannot be updated? i tried flashing through samfirmware's dxjpa.. bt my phone is stucked at the loading screeen