[Galaxy Y GT-S5360 General] kurotsugi:
# 3g mod
setprop ro.ril.enable.dtm 1
setprop ro.ril.gprsclass 10 # it used to set the gprs class to 10 - for battery saving. you can change to 12 if you want. its not related with wifi.
setprop ro.ril.hep 1
setprop ro.ril.enable.3g.prefix 1
setprop ro.ril.hsdpa.category 8
setprop ro.ril.hsupa.category 6
setprop ro.ril.hsxpa 2
setprop ro.ril.enable.a53 1
setprop ro.ril.htcmaskw1.bitmask 4294967295
setprop ro.ril.htcmaskw1 14449
setprop ro.config.hw_fast_dormancy 1
echo "3g signal mod---------[OK]" | tee -a $LOG_FILE;

# battery mod n media
setprop debug.performance.tuning 1
setprop pm.sleep_mode 1
setprop windowsmgr.max_events_per_sec 90
setprop ro.ril.disable.power.collapse 0
setprop wifi.supplicant_scan_interval 180
setprop ro.media.enc.jpeg.quality 100
setprop debug.sf.hw 1
setprop ro.vold.umsdirtyratio 20
echo "battery n media-------[OK]" | tee -a $LOG_FILE;

# performance
# setprop persist.sys.purgeable_assets 1
setprop dalvik.vm.execution-mode int:jit
setprop dalvik.vm.dexopt-flags l=x,n=z,m=y # this one is the most crucial part.
setprop dalvik.vm.verify-bytecode false # boot faster. remove it if you got a lot of FC. not related with any UI lag problem.
setprop dalvik.vm.heapsize 64m
setprop dalvik.vm.heapgrowthlimit 48m # after watching the result, it only work for ICS
setprop dalvik.vm.dexopt-data-only 1 # ics
setprop dalvik.vm.jmiopts forcecopy # ics
setprop dalvik.vm.lockprof.treshold 250 # ics
setprop ro.kernel.android.checkjni 0
setprop ro.telephony.call_ring.delay 0
setprop debug.kill_allocating_task 1
# defaul is zero

# 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

# 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;

# 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

# xperia mental
setprop persist.android.strictmode 0
setprop persist.sys.ui.hw 1 # hw render. made ui faster.
setprop ro.max.fling_velocity 12000
setprop ro.min.fling_velocity 2000
setprop ro.mot.eri.losalert.delay 1000 # this one disable your wifi tethering. delete it if you use it.
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
setprop profiler.force_disable_err_rpt 1
setprop profiler.force_disable_ulog 1
setprop logcat.live disable
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
setprop debug.egl.profiler 1 # made your system. hw rendered. it made the ui goes faster in my device.
setprop debug.egl.hw 1 # hw render
setprop debug.composition.type gpu #hw render

if you want deep explanation check the notes above. if you found that your UI becomes laggy, you can delete the hw render stuff.