[Sony Xperia Miro, Tipo (Dual), J, E] Minimilised_MR:
Build.prop Tweaks For JellyBean/CM-10​

Enhances overall Scrolling Lag.

Improves Camera Quality

RAM Optimizer.

Overall Battery Life Improvement.

Added Option To make Capacitive button backlight ON[Just Remove "#"]

Added Option To Disable bootanimation for faster boot's[Just Remove "#"]

Better Touch Responsiveness [Not Sure]

Remove Delays in making Calls

Faster Streaming

Better Image Quality[Just Remove "#"]

Build.prop Tweaks:

# Faster Streaming
media.stagefright.enable-player=true
media.stagefright.enable-meta=true
media.stagefright.enable-scan=true
media.stagefright.enable-http=true
media.stagefright.enable-record=false

# Better Image & Audio Quality
ro.media.dec.jpeg.memcap=8000000
ro.media.enc.hprof.vid.bps=8000000
ro.media.enc.jpeg.quality=100

# Net Speed 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
net.tcp.buffersize.hspa=4096,87380,256960,4096,163 84,256960
net.tcp.buffersize.lte=524288,1048576,2097152,524288,1048576,2097152
net.tcp.buffersize.hspda=4096,87380,256960,4096,16 384,256960
net.tcp.buffersize.evdo_b=6144,87380,1048576,6144,87380,1048576

# Google DNS
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 Delay In Making Call
ro.telephony.call_ring.delay=0
ring.delay=0

# Battery Tweaks
pm.sleep_mode=1
ro.ril.disable.power.collapse=0
ro.ril.fast.dormancy.rule=0

# Proximity Tweaks
ro.lge.proximity.delay=25
mot.proximity.delay=25

# Frees More RAM
persist.sys.purgeable_assets=1

# Signal Tweaks
ro.ril.enable.amr.wideband=1
persist.cust.tel.eons=1
ro.config.hw_fast_dormancy=1
ro.ril.hsxpa=2
ro.ril.gprsclass=12
ro.ril.enable.dtm=1
ro.ril.hsdpa.category=8
ro.ril.enable.a53=1
ro.ril.enable.3g.prefix=1
ro.ril.htcmaskw1.bitmask=4294967295
ro.ril.htcmaskw1=14449
ro.ril.hsupa.category=6

# Fast Reboot
persist.sys.shutdown.mode=hibernate
ro.config.hw_quickpoweron=true

# Better Responsiveness & Speed
windowsmgr.max_events_per_sec=90
ro.max.fling_velocity=12000
ro.min.fling_velocity=8000

# Lock App In Memory
sys.keep_app_1=put-process-name-of-app-here

# Other Tweaks
ro.media.dec.aud.wma.enabled=1
ro.media.dec.vid.wmv.enabled=1
ro.mot.eri.losalert.delay=1000
dalvik.vm.execution-mode=int:jit
ro.config.hwfeature_wakeupkey=0
ro.kernel.android.checkjni=0
ro.kernel.checkjni=0
persist.adb.notify=0
vm.stat_interval=1
persist.android.strictmode=0
profiler.force_disable_err_rpt=1
profiler.force_disable_ulog=1
ro.config.nocheckin=1

# Enable Surface Dithering Which Will Raise Image Quality At The Cost Of Performances - 1=ON;0=OFF
persist.sys.use_dithering=0

# Enables 270 Degree Rotation
windowsmgr.support_rotation_270=true;

# Improves Camera & Video Results
ro.media.panorama.defres=3264x1840
ro.media.panorama.frameres=1280x720
ro.camcorder.videoModes=true

#
# Experimental Tweaks
#

#touch.presure.scale=0.001
#ro.min_pointer_dur=8
#ro.media.enc.hprof.vid.fps=65

# ButtonLight Always On - Remove # Below To Enable
#ro.mot.buttonlight.timeout=0

# No BootAnimation For Faster Reboot - Remove # Below To Enable
#debug.sf.nobootanimation=1

# May Improve Pictures - Remove # Below To Enable
#ro.media.cam.preview.fps=0

Note:

--Copy These Lines/Tweaks to the end of the Build.prop and Save it. Just after that Reboot!! :D

--For Using Experimental Tweaks just remove the #

--Thanks to Top Droid for these amazing tweaks!!

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