[Android Software/Hacking General [Developers Only]] XtremePeople:
Intro

Tweaks build.prop and init.d for Speed,Perfomance and Battery life​

Build.prop Tweaks :)

# Raise JPG quality to 100%
ro.media.enc.jpeg.quality=100

# VM Heapsize; 178MB RAM = 32 is better
dalvik.vm.heapsize=32m

# Render UI with GPU
debug.sf.hw=1

# Decrease dialing out delay
ro.telephony.call_ring.delay=0

# Helps scrolling responsiveness
windowsmgr.max_events_per_sec=150

# Save battery
wifi.supplicant_scan_interval=180
pm.sleep_mode=1
ro.ril.disable.power.collapse=0

# Disable debugging notify icon on statusbar
persist.adb.notify=0

# Increase overall touch responsiveness
debug.performance.tuning=1
video.accelerate.hw=1

# Photo and video recording quality tweak (2.3 Rom only)
ro.media.dec.jpeg.memcap=8000000
ro.media.enc.hprof.vid.bps=800000

# Photo and video recording quality tweak (2.2 Rom only)
ro.media.dec.jpeg.memcap=10000000
ro.media.enc.hprof.vid.bps=1000000

# Photo and video recording quality tweak (Official ROM only)
ro.media.dec.jpeg.memcap=10000000
ro.media.enc.hprof.vid.bps=1600000

# Internet tweaks
ro.ril.hsxpa=2
ro.ril.gprsclass=12
ro.ril.hep=1
ro.ril.hsdpa.category=10
ro.ril.enable.3g.prefix=1
ro.ril.htcmaskw1.bitmask=4294967295
ro.ril.htcmaskw1=14449
ro.ril.hsupa.category=6
ro.ril.def.agps.mode=2
ro.ril.def.agps.feature=1
ro.ril.enable.sdr=1
ro.ril.enable.gea3=1
ro.ril.enable.fd.plmn.prefix=23402,23410,23411
ro.ril.enable.a52=1
ro.ril.enable.a53=1
ro.ril.enable.dtm=1

# NetSpeed tweaks
net.tcp.buffersize.default=4096,87380,256960,4096,16384,256960
net.tcp.buffersize.wifi=4096,87380,256960,4096,16384,256960
net.tcp.buffersize.umts=4096,87380,256960,4096,16384,256960
net.tcp.buffersize.gprs=4096,87380,256960,4096,16384,256960
net.tcp.buffersize.edge=4096,87380,256960,4096,16384,256960

# Disable blackscreen issue after a call
ro.lge.proximity.delay=25
mot.proximity.delay=25

# Fix some application issues
ro.kernel.android.checkjni=0

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

# Force button lights on when screen is on
ro.mot.buttonlight.timeout=0

# Disable boot animation for faster boot
debug.sf.nobootanimation=1

# Enable Stagefright helps stream Video and Music Faster
media.stagefright.enable-player=true
media.stagefright.enable-meta=true
media.stagefright.enable-scan=true
media.stagefright.enable-http=true

init.d tweaks :)​

Download Init.dtweaks.rar and choose 99Tweaks for balance option and 99XTweaks for aggressive tweaks

Init.d tweaks contain

LowmemoryKiller Tweaks Balance

echo "0,3,5,7,14,15" > /sys/module/lowmemorykiller/parameters/adj
echo "1536,2048,6656,7168,7680,8192" > /sys/module/lowmemorykiller/parameters/minfree
echo "0" > /proc/sys/kernel/panic
echo "0" > /proc/sys/vm/oom_kill_allocating_task
echo "0" > /proc/sys/vm/panic_on_oom
echo "1" > /proc/sys/kernel/panic_on_oops
echo "0" > /proc/sys/kernel/panic

LowmemoryKiller Tweaks aggressive

echo "0,3,5,7,14,15" > /sys/module/lowmemorykiller/parameters/adj
echo "2560,4096,6144,15360,17920,20480" > /sys/module/lowmemorykiller/parameters/minfree
echo "0" > /proc/sys/kernel/panic
echo "0" > /proc/sys/vm/oom_kill_allocating_task
echo "0" > /proc/sys/vm/panic_on_oom
echo "1" > /proc/sys/kernel/panic_on_oops
echo "0" > /proc/sys/kernel/panic

IPv4 tweaks

echo "0" > /proc/sys/net/ipv4/tcp_timestamps;
echo "1" > /proc/sys/net/ipv4/tcp_tw_reuse;
echo "1" > /proc/sys/net/ipv4/tcp_sack;
echo "1" > /proc/sys/net/ipv4/tcp_tw_recycle;
echo "1" > /proc/sys/net/ipv4/tcp_window_scaling;
echo "5" > /proc/sys/net/ipv4/tcp_keepalive_probes;
echo "30" > /proc/sys/net/ipv4/tcp_keepalive_intvl;
echo "30" > /proc/sys/net/ipv4/tcp_fin_timeout;
echo "404480" > /proc/sys/net/core/wmem_max;
echo "404480" > /proc/sys/net/core/rmem_max;
echo "256960" > /proc/sys/net/core/rmem_default;
echo "256960" > /proc/sys/net/core/wmem_default;
echo "4096,16384,404480" > /proc/sys/net/ipv4/tcp_wmem;
echo "4096,87380,404480" > /proc/sys/net/ipv4/tcp_rmem;

Dalvik VM tweaks

echo "4096" > /proc/sys/vm/min_free_kbytes
echo "0" > /proc/sys/vm/oom_kill_allocating_task;
echo "0" > /proc/sys/vm/panic_on_oom;
echo "0" > /proc/sys/vm/laptop_mode;
echo "0" > /proc/sys/vm/swappiness
echo "50" > /proc/sys/vm/vfs_cache_pressure
echo "90" > /proc/sys/vm/dirty_ratio
echo "70" > /proc/sys/vm/dirty_background_ratio

Battery Tweaks

echo "500" > /proc/sys/vm/dirty_expire_centisecs
echo "1000" > /proc/sys/vm/dirty_writeback_centisecs

Note:If you have init.d problem or if not have init.d folder try add this line at hw_config.sh

Balance Tweaks

# Low memory killer tweaks
echo "0,3,5,7,14,15" > /sys/module/lowmemorykiller/parameters/adj
echo "1536,2048,6656,7168,7680,8192" > /sys/module/lowmemorykiller/parameters/minfree
echo "0" > /proc/sys/kernel/panic
echo "0" > /proc/sys/vm/oom_kill_allocating_task
echo "0" > /proc/sys/vm/panic_on_oom
echo "1" > /proc/sys/kernel/panic_on_oops
echo "0" > /proc/sys/kernel/panic

IPV4 tweaks
echo "0" > /proc/sys/net/ipv4/tcp_timestamps
echo "1" > /proc/sys/net/ipv4/tcp_tw_reuse
echo "1" > /proc/sys/net/ipv4/tcp_sack
echo "1" > /proc/sys/net/ipv4/tcp_tw_recycle
echo "1" > /proc/sys/net/ipv4/tcp_window_scaling
echo "5" > /proc/sys/net/ipv4/tcp_keepalive_probes
echo "30" > /proc/sys/net/ipv4/tcp_keepalive_intvl
echo "30" > /proc/sys/net/ipv4/tcp_fin_timeout
echo "404480" > /proc/sys/net/core/wmem_max
echo "404480" > /proc/sys/net/core/rmem_max
echo "256960" > /proc/sys/net/core/rmem_default
echo "256960" > /proc/sys/net/core/wmem_default
echo "4096,16384,404480" > /proc/sys/net/ipv4/tcp_wmem
echo "4096,87380,404480" > /proc/sys/net/ipv4/tcp_rmem

Dalvik VM tweaks
echo "4096" > /proc/sys/vm/min_free_kbytes
echo "0" > /proc/sys/vm/oom_kill_allocating_task
echo "0" > /proc/sys/vm/panic_on_oom
echo "0" > /proc/sys/vm/laptop_mode
echo "0" > /proc/sys/vm/swappiness
echo "50" > /proc/sys/vm/vfs_cache_pressure
echo "90" > /proc/sys/vm/dirty_ratio
echo "70" > /proc/sys/vm/dirty_background_ratio

Battery tweaks
echo "500" > /proc/sys/vm/dirty_expire_centisecs
echo "1000" > /proc/sys/vm/dirty_writeback_centisecs

Aggressive Tweaks

# Low memory killer
echo "0,3,5,7,14,15" > /sys/module/lowmemorykiller/parameters/adj
echo "2560,4096,6144,15360,17920,20480" > /sys/module/lowmemorykiller/parameters/minfree
echo "0" > /proc/sys/kernel/panic
echo "0" > /proc/sys/vm/oom_kill_allocating_task
echo "0" > /proc/sys/vm/panic_on_oom
echo "1" > /proc/sys/kernel/panic_on_oops
echo "0" > /proc/sys/kernel/panic

# IPV4 tweaks
echo "0" > /proc/sys/net/ipv4/tcp_timestamps
echo "1" > /proc/sys/net/ipv4/tcp_tw_reuse
echo "1" > /proc/sys/net/ipv4/tcp_sack
echo "1" > /proc/sys/net/ipv4/tcp_tw_recycle
echo "1" > /proc/sys/net/ipv4/tcp_window_scaling
echo "5" > /proc/sys/net/ipv4/tcp_keepalive_probes
echo "30" > /proc/sys/net/ipv4/tcp_keepalive_intvl
echo "30" > /proc/sys/net/ipv4/tcp_fin_timeout
echo "404480" > /proc/sys/net/core/wmem_max
echo "404480" > /proc/sys/net/core/rmem_max
echo "256960" > /proc/sys/net/core/rmem_default
echo "256960" > /proc/sys/net/core/wmem_default
echo "4096,16384,404480" > /proc/sys/net/ipv4/tcp_wmem
echo "4096,87380,404480" > /proc/sys/net/ipv4/tcp_rmem

# Dalvik VM tweaks
echo "4096" > /proc/sys/vm/min_free_kbytes
echo "0" > /proc/sys/vm/oom_kill_allocating_task
echo "0" > /proc/sys/vm/panic_on_oom
echo "0" > /proc/sys/vm/laptop_mode
echo "0" > /proc/sys/vm/swappiness
echo "50" > /proc/sys/vm/vfs_cache_pressure
echo "90" > /proc/sys/vm/dirty_ratio
echo "70" > /proc/sys/vm/dirty_background_ratio

# Battery tweaks
echo "500" > /proc/sys/vm/dirty_expire_centisecs
echo "1000" > /proc/sys/vm/dirty_writeback_centisecs