[Galaxy Y GT-S5360 General] kurotsugi:
now, for kuro2 stuff, please check into this.

setprop dalvik.vm.execution-mode int:jit
setprop dalvik.vm.dexopt-flags l=x,n=z,m=y
# you might want to change it to m=y to get a stable one.
setprop dalvik.vm.verify-bytecode false
setprop dalvik.vm.heapsize 64m --> don't get fooled by higher number. 48 is basicly enough for everything
setprop dalvik.vm.heapgrowthlimit 48m --> only work for ics
setprop dalvik.vm.dexopt-data-only 1
setprop dalvik.vm.jmiopts forcecopy
setprop dalvik.vm.lockprof.treshold 250
setprop ro.kernel.android.checkjni 0
setprop ro.telephony.call_ring.delay 0
setprop debug.kill_allocating_task 1
# default value is zero. 1 for more aggressive memory

# mem adj
setprop ro.FOREGROUND_APP_ADJ 0
setprop ro.VISIBLE_APP_ADJ 4
setprop ro.SECONDARY_SERVER_ADJ 6
setprop ro.HIDDEN_APP_MIN_ADJ 8
setprop ro.CONTENT_PROVIDER_ADJ 12
setprop ro.EMPTY_APP_ADJ 15
# all this stuff need to run manually via terminal with root permission

# mem minfree
setprop ro.FOREGROUND_APP_MEM 1536
setprop ro.VISIBLE_APP_MEM 2048
setprop ro.SECONDARY_SERVER_MEM 4096
setprop ro.HIDDEN_APP_MEM 5120
setprop ro.CONTENT_PROVIDER_MEM 5632
setprop ro.EMPTY_APP_MEM 6144
echo "performance-----------[OK]" | tee -a $LOG_FILE;
# just like above...need to run manually via terminal with root permission to modify.
# Disable debugging notify icon on statusbar
setprop persist.adb.notify 0

# Disable blackscreen issue after a call
setprop ro.lge.proximity.delay 0
setprop mot.proximity.delay 0

# Phone will not wake up from hitting the volume rocker
# setprop ro.config.hwfeature_wakeupkey 0

# Enable display Dithering
# setprop persist.sys.use_dithering 1 --> only work for cm

# xperia mental
setprop persist.android.strictmode 0 --> ICS
setprop persist.sys.ui.hw 1
setprop ro.max.fling_velocity 12000 --> need to change the build.prop value directly
setprop ro.min.fling_velocity 2000 --> need to change the build.prop value directly
setprop ro.mot.eri.losalert.delay 1000
setprop ro.kernel.checkjni 0
setprop ro.config.nocheckin 1

setprop debug.qctwa.statusbar 1
setprop debug.qctwa.preservebuf 1
setprop debug.qc.hardware true
setprop com.qc.hardware true
# these stuff isn't confirmed working

setprop profiler.force_disable_err_rpt 1
setprop profiler.force_disable_ulog 1
setprop logcat.live disable
# disable logcat only reported work in ICS. I never tried it on SGY

setprop net.ppp0.dns1 8.8.8.8
setprop net.ppp0.dns2 8.8.4.4
setprop net.dns1 8.8.8.8
setprop net.rmnet0.dns1 8.8.8.8
setprop net.rmnet0.dns2 8.8.4.4
setprop net.dns2 8.8.4.4
# common dns tweak...all ot them is working. if you already have it in build.prop you need to modify it directly on your build.prop

setprop debug.egl.profiler 1
setprop debug.egl.hw 1
setprop debug.composition.type gpu
# not tested in sgy. work in xperia

in my tweak for ICS, you'll find

setprop af.resample 48000;
setprop af.resampler.quality 255;
setprop ro.audio.samplerate 48000;
setprop ro.audio.pcm.samplerate 48000;
setprop persist.af.resample 48000;
setprop persist.af.resampler.quality 255;
setprop persist.ro.audio.samplerate 48000;
setprop persist.ro.audio.pcm.samplerate 48000;
setprop persist.dev.pm.dyn_samplingrate 1;
# its for alsa based device. sgy use broadcomm sound I doubt it will work on sgy