build.prop tweaks

转自：http://forum.xda-developers.com/showthread.php?t=1735128

i will keep updating as i play arround with diferent values. if you have any other tweaks you want to add let me know and i will add to the list.
add or edit existing lines to build.prop with text editor. you can do it with rootexplorer or copy it to the sd card and open on your computer using notepad++ or any other text editor and then push it back using abd or root explorer. these should help with performance and battery life.
Note: if you dont know what you are doing please dont try. read first and make sure you understand what you are doing and make a backup before doing any mods. i am not responsible for messing up your device but the s3 community and i may assist.

Edit Existing lines:

PHP Code:

dalvik.vm.heapgrowthlimit=256m

better scrolling:

PHP Code:

windowsmgr.max_events_per_sec=300

ro.max.fling_velocity=12000

ro.min.fling_velocity=8000

Signal and data:

PHP Code:

ro.ril.hsxpa=3

ro.ril.gprsclass=12

Add to the end of build.prop:

batter battery: ro.mot.eri.losalert.delay=1000 might break tethering

PHP Code:

ro.ril.disable.power.collapse=1

wifi.supplicant_scan_interval=100

ro.mot.eri.losalert.delay=1000

Video acceleration and hw debugging

PHP Code:

debug.performance.tuning=1

video.accelerate.hw=1

Better audio and video recording quality:

PHP Code:

ro.media.dec.jpeg.memcap=12000000

ro.media.enc.hprof.vid.bps=12000000

Better image quality:

PHP Code:

ro.media.enc.jpeg.quality=100

Gives better image quality when enabled(1) but lowers performance:

PHP Code:

persist.sys.use_dithering=0

Dalvik VM tweaks:

PHP Code:

dalvik.vm.startheapsize=8M

dalvik.vm.dexopt-flags=m=y

dalvik.vm.execution-mode=init:jit

ro.kernel.android.checkjni=0

ro.kernel.checkjni=0

Rings faster when dialing:

PHP Code:

ro.telephony.call_ring.delay=0

Phone sleeps better:

PHP Code:

pm.sleep_mode=1

disables android debugging notification:

PHP Code:

persist.adb.notify=0

Frees up more ram when needed

PHP Code:

persist.sys.purgeable_assets=1

faster streaming:

PHP Code:

media.stagefright.enable-meta=true

media.stagefright.enable-record=false

disables waking up with volume rocker:

PHP Code:

ro.config.hwfeature_wakeupkey=0

signal and data tweaks:

PHP Code:

ro.ril.hep=1

ro.mot.eri.losalert.delay=1000

ro.ril.enable.dtm=1

ro.ril.hsdpa.category=28

ro.ril.enable.a53=1

ro.ril.enable.3g.prefix=1

ro.ril.htcmaskw1.bitmask=4294967295

ro.ril.htcmaskw1=14449

ro.ril.hsupa.category=7

UPDATE 6/27 (should give better net speeds than the previous values):

PHP Code:

net.tcp.buffersize.default=6144,87380,1048576,6144,87380,524288

net.tcp.buffersize.wifi=524288,1048576,2097152,524288,1048576,2097152

net.tcp.buffersize.umts=6144,87380,1048576,6144,87380,524288

net.tcp.buffersize.gprs=6144,87380,1048576,6144,87380,524288

net.tcp.buffersize.edge=6144,87380,524288,6144,16384,262144

net.tcp.buffersize.hspa=6144,87380,524288,6144,16384,262144

net.tcp.buffersize.lte=524288,1048576,2097152,524288,1048576,2097152

net.tcp.buffersize.hsdpa=6144,87380,1048576,6144,87380,1048576

net.tcp.buffersize.evdo_b=6144,87380,1048576,6144,87380,1048576

Use Google DNS:

PHP Code:

net.ppp0.dns1=8.8.8.8

net.ppp0.dns2=8.8.4.4

net.dns1=8.8.8.8

net.dns2=8.8.4.4

No boot animation

PHP Code:

debug.sf.nobootanimation=1

build.prop tweaks

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