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Device Side Performance

Optimization of Mobile Apps

July 8, 2011

Recorded version available at

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Agenda

Device sideperformancechallenges formobile

applications

Why performanceanalysis?

Performanceanalysis approach

Planningperformanceanalysis ofmobileapps

Optimizationtechniques forbetterperformance

Real-worldexamples

Recorded version available at

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Device-side Performance Challenges forMobile Applications

Diversity inhandsets

Differenceinthe screen size

Variations inbattery lifeandmemory

3G Option/ Wi-Fi Capabilities

Touch, Multi-touch

Differenttypes ofprocessors andhardware

Devicefeatures, suchas GPS, Camera, etc.

Applicationdevelopmentmethodology

Recorded version available at

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Importance of Performance Analysis

Saves Battery Life Faster Time to Market

Application Stability Limited Code Change

Recorded version available at

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Performance Factors

PerformanceAnalysis

Processinfo

Deviceinfo

Taskinfo

PUinfo

Debuginfo

Service

info

Batteryinfo

Memoryinfo

Recorded version available at

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Options for Performance Analysis

Usingextensivedebuggingtools

Traceview& Eclipsememory analyzer&DDMSforAndroid

J2ME profilerforJavaphones

JDE memory analyzerforBlackBerry

Instruments foriPhone

Usageofsmall stubs

Automated scripts

Recorded version available at

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Performance Analysis Approach

Instrument the device

Capturing performanceparameters on device

Extracting, collating &analyzing

Reporting performancebottlenecks

Recorded version available at

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Optimization Techniques

UI independent layouts anddesign

Addresses challenges createdby diversity inhandsets, differencein

device screen sizes & Touch/Multi-touchfeature

Developingno-porting/less-portingbuildtoreducebinary size

ProperusageofMVC framework

Address ApplicationDevelopment Methodology issues

Endorses platformindependentdesignforapplications

Recorded version available at

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Optimization Techniques

Optimizedcommunication

Resolves issues causedby 3G andDevice Wi-Ficapabilities

Connectto serverusingpush-basednotifications

Implementingobjects anddatacachingmechanisms

Using scaled-downprotocols andminimumfunctionalities

Auto selectionofmostpreferredmode

Designconsiderations ofavailablenetworkoptions

Recorded version available at

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Optimization Techniques

Memorymanagementwiththehelpofweakreferences

Helps applicationdevelopmentmethodology

Usingweakreferencetomanagedevicememory

Lazy loadingofresources Addresses problemcreatedby diverseprocessors andhardware

Enhancedturnaroundtime

Workerthreadimplementation

Business Logicoperations canbeimplementedonworkerthread

Recorded version available at

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Real-world Experience

The Client

A leadingfinancial services provider

Key Challenges

Applicationnot usableaftersometime

Application screens aretakingtimeto load

Extra usageofmemory incertainevents

Impetus Solution

Wrote small stubs intheapplicationtoidentify performancebottlenecks

Reinventtheimageprocessingalgorithmtoreduce CPUcycles

Usageofmultithreadedapproach

Analyzememory usageandresolvememory leaks fromthe system

Benefits Realised

Tremendous increase in applications performance and life

Enhanced application consumes lesser memory vis- a-vis prev version

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Real-world Experience

The Client

A leading Mediabroadcast serviceprovidercompany

Key Challenges

Playing smoothaudio-videotogetherwithoutinterruption

Various networkprotocol usage

Enhancebattery life soas toplay videofor3-4

Impetus Solution

Customizeddata sourceimplementation

ImplementedRTSP, RTP, RTCPprotocols withdevicethreading support

Eventqueuetoprocess media streams

Benefits Realised

Enhanced battery life

Audio/Video synchronization maintained and better quality delivered

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Driven by..

Impetus Mobile Maturity Model

Recorded version available at

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To Summarize..

Application shouldnotadversely affectdevice CPUandmemory

Performanceanalysis tobebasedon CPU, memory, service,

debugandprocess infoparameters

Small stubs canbe usedtoidentify problemareaofyourapp

Optimizationtechniques canbeincorporatedwhererequired

Rightdesignedapplicationwill always getdesiredperformance

Recorded version available at

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Impetus Technologies

We offer innovative product engineering

and technology R&D services

Recorded version available at

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Questions

Please send in your questions

using the chat panel

Recorded version available at

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Thank you

Mail us [email protected]

orvisitwww.impetus.com

Recorded version available at

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