Android: Performance Testing-Akshay Dashrath

Need Speed?

What about?

Tools

• Analysing logs (Trace View)• Heap Dump Analysis• Debug class

Trace View

• Graphical Tool to analyse execution logs

• // start tracing to "/sdcard/test.trace"

Debug.startMethodTracing(“test"); // ... // stop tracing

Debug.stopMethodTracing();• adb pull /sdcard/test.trace C:/• traceview C:/trace.test

Issues

• If a thread exits during profiling, the thread name is not emitted;

• The VM reuses thread IDs. If a thread stops and another starts, they may get the same ID.

• .trace files larger than 8MB cannot be read by the Viewer

Instruction Count

Instructions Executed Method Invocations0

200000

400000

600000

800000

1000000

1200000

1400000

1600000

1800000

349 55

1584331

280490

1570294

160061

Heap Dumps

• C:/adb shell• C:/ chmod 777 /data/misc – In order to make the /data/misc

directory writeable• C:/exit• C:/ adb shell ps• C:/ adb shell kill -10 1234 -------Example• C:/ adb pull /data/misc/heap-dump-tm-pid.hprof

address.hprof• C:/ hprof-conv heap-dump-tm-pid.hprof 4mat.hprof

Questions?