Performance Tools on Android

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Performance Tools Andrei Diaconu

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Andrei Diaconu

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Andrei Diaconu

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Andrei Diaconu

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Andrei Diaconu • Cofounder of Android Iași

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Andrei Diaconu • Cofounder of Android Iași • 5 years of Android

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Andrei Diaconu • Cofounder of Android Iași • 5 years of Android • Trainer & Speaker

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Why is my app dropping below 60fps?

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Why is my app dropping below 60fps? Why is my app draining the battery?

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Why is my app dropping below 60fps?

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Why is my app dropping below 60fps?

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Why is my app dropping below 60fps? • Simple list

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Why is my app dropping below 60fps? • Simple list • Items have some text

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Why is my app dropping below 60fps? • Simple list • Items have some text

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Why is my app dropping below 60fps? • Simple list • Items have some text • Scroll is not smooth

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• Scroll is not smooth

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• Scroll is not smooth Why?

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• Scroll is not smooth Why? Can we make sure?

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• Scroll is not smooth Why? Can we make sure?

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Can we make sure?

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Can we make sure?

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Can we make sure?

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Can we make sure?

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Frames

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Frames Time

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Frames 16ms line Time

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Frames 16ms line Time Choreographer: Skipped 34 frames! The application may be doing too much work on its main thread.

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Traceview

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Traceview • Measure how long each method takes to execute

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Traceview • Measure how long each method takes to execute • Analyse measurements using Traceview

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Traceview • Measure how long each method takes to execute

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Traceview //Start in OnResume  Debug.startMethodTracing("bad_list"); • Measure how long each method takes to execute

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Traceview //Start in OnResume  Debug.startMethodTracing("bad_list"); //Stop in OnPause  Debug.stopMethodTracing(); • Measure how long each method takes to execute

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Traceview //Start in OnResume  Debug.startMethodTracing("bad_list"); //Stop in OnPause  Debug.stopMethodTracing(); //Grab using adb  adb pull • Measure how long each method takes to execute

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Traceview //Start in OnResume  Debug.startMethodTracing("bad_list"); //Stop in OnPause  Debug.stopMethodTracing(); //Grab using adb  adb pull • Measure how long each method takes to execute //Grab using adb  adb pull /sdcard/bad_list.trace bad_list.trace

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Traceview //Start in OnResume  Debug.startMethodTracing("bad_list"); //Stop in OnPause  Debug.stopMethodTracing(); //Grab using adb  adb pull • Measure how long each method takes to execute //Needs permission WRITE_EXTERNAL_STORAGE //Grab using adb  adb pull /sdcard/bad_list.trace bad_list.trace

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Traceview //Start in OnResume  Debug.startMethodTracing("bad_list"); //Stop in OnPause  Debug.stopMethodTracing(); //Grab using adb  adb pull • Measure how long each method takes to execute //Needs permission WRITE_EXTERNAL_STORAGE //Grab using adb  adb pull /sdcard/bad_list.trace bad_list.trace

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Traceview • Measure how long each method takes to execute

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Traceview • Measure how long each method takes to execute

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Traceview • Measure how long each method takes to execute • Analyse measurements using Traceview • Analyse measurements using Traceview

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Traceview • Measure how long each method takes to execute • Analyse measurements using Traceview • Analyse measurements using Traceview

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Traceview • Measure how long each method takes to execute • Analyse measurements using Traceview • Analyse measurements using Traceview

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Traceview • Measure how long each method takes to execute • Analyse measurements using Traceview • Analyse measurements using Traceview

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~ 2 seconds

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~ 200 ms

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Adaptor -> getView() ~ 200 ms

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inﬂate()

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inﬂate() 4 x Html.fromHtml()

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@Override  public View getView(int position, View convertView, ViewGroup parent) {   View view = LayoutInflater.from(parent.getContext()) .inflate(R.layout.item_jumpy_list, parent, false);    TextView text1 = (TextView) view.findViewById(R.id.item_text1);  TextView text2 = (TextView) view.findViewById(R.id.item_text2);  TextView text3 = (TextView) view.findViewById(R.id.item_text3);  TextView text4 = (TextView) view.findViewById(R.id.item_text4);    String string1 = parent.getContext().getString(R.string.item_number_x, position);  String string2 = parent.getContext().getString(R.string.item_description);  String string3 = parent.getContext().getString(R.string.item_details);  String string4 = parent.getContext().getString(R.string.item_related);    text1.setText(Html.fromHtml(string1));  text2.setText(Html.fromHtml(string2));  text3.setText(Html.fromHtml(string3));  text4.setText(Html.fromHtml(string4));   return view;  }

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@Override  public View getView(int position, View convertView, ViewGroup parent) {   No recycling    No View Holder      Html.fromHtml is slow   return view;  }

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But 200ms? Isn't this a bit much?

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But 200ms? Isn't this a bit much? Method tracking has a big impact itself

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Systrace measure at kernel level

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Systrace

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Systrace

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Systrace

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Systrace

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Systrace It will run for 5 seconds Hit Ok and scroll the list

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Alert: Inﬂation during ListView recycling Time spent: 103.545 ms ListView items inﬂated: 20

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@Override  public View getView(int position, View convertView, ViewGroup parent) {    View view = LayoutInflater.from(parent.getContext()) .inflate(R.layout.item_jumpy_list, parent, false);        TextView text1 = (TextView) view.findViewById(R.id.item_text1);  TextView text2 = (TextView) view.findViewById(R.id.item_text2);  TextView text3 = (TextView) view.findViewById(R.id.item_text3);  TextView text4 = (TextView) view.findViewById(R.id.item_text4);      String string1 = parent.getContext().getString(R.string.item_number_x, position);  String string2 = parent.getContext().getString(R.string.item_description);  String string3 = parent.getContext().getString(R.string.item_details);  String string4 = parent.getContext().getString(R.string.item_related);      text1.setText(Html.fromHtml(string1));  text2.setText(Html.fromHtml(string2));  text3.setText(Html.fromHtml(string3));  text4.setText(Html.fromHtml(string4));      return view;  }

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@Override  public View getView(int position, View convertView, ViewGroup parent) {  Trace.beginSection("inflating");  View view = LayoutInflater.from(parent.getContext()) .inflate(R.layout.item_jumpy_list, parent, false);  Trace.endSection();    Trace.beginSection("noViewHolder");  TextView text1 = (TextView) view.findViewById(R.id.item_text1);  TextView text2 = (TextView) view.findViewById(R.id.item_text2);  TextView text3 = (TextView) view.findViewById(R.id.item_text3);  TextView text4 = (TextView) view.findViewById(R.id.item_text4);  Trace.endSection();    String string1 = parent.getContext().getString(R.string.item_number_x, position);  String string2 = parent.getContext().getString(R.string.item_description);  String string3 = parent.getContext().getString(R.string.item_details);  String string4 = parent.getContext().getString(R.string.item_related);    Trace.beginSection("fromHtml");  text1.setText(Html.fromHtml(string1));  text2.setText(Html.fromHtml(string2));  text3.setText(Html.fromHtml(string3));  text4.setText(Html.fromHtml(string4));  Trace.endSection();    return view;  }

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inﬂating

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inﬂating noViewHolder

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inﬂating noViewHolder fromHtml

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• obtainView = ~5ms

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• obtainView = ~5ms • doFrame = ~20 * obtainView

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• obtainView = ~5ms • doFrame = ~20 * obtainView • each frame = ~100ms

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• obtainView = ~5ms • doFrame = ~20 * obtainView • each frame = ~100ms Alert: Inﬂation during ListView recycling Time spent: 103.545 ms ListView items inﬂated: 20

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Why is my app dropping below 60fps?

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Why is my app dropping below 60fps? Why is my app draining the battery?

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Why is my app draining the battery?

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Why is my app draining the battery? What is a wake lock?

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Why is my app draining the battery?

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Why is my app draining the battery? Battery Historian 2.0

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Why is my app draining the battery? Battery Historian 2.0

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Why is my app draining the battery? Battery Historian 2.0 adb bugreport > bugreport.txt

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Why is my app draining the battery? Battery Historian 2.0 adb bugreport > bugreport.txt go run battery-historian.go

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Why is my app draining the battery? Battery Historian 2.0 adb bugreport > bugreport.txt go run battery-historian.go open http://127.0.0.1:9999

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public static class UselessWorker {  Runnable uselessWorker = new Runnable() {  @Override  public void run() {  PowerManager pm = (PowerManager) BadApplication.instance  .getSystemService(Context.POWER_SERVICE);  PowerManager.WakeLock wakeLock =   pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "cool wakelock tag");  wakeLock.acquire();    //Some useless, but hard work    wakeLock.release();  try {  Thread.sleep(45 * 1000);  } catch (InterruptedException e) {  e.printStackTrace();  } finally {  work();  }  }  };    private void work() {  new Thread(uselessWorker, "cool thread name").start();  }  } public static class UselessWorker {  Runnable uselessWorker = new Runnable() {  @Override  public void run() {  PowerManager pm = (PowerManager) BadApplication.instance  .getSystemService(Context.POWER_SERVICE);  PowerManager.WakeLock wakeLock =   pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "cool wakelock tag");  wakeLock.acquire();    //Some useless, but hard work    wakeLock.release();  try {  Thread.sleep(45 * 1000);  } catch (InterruptedException e) {  e.printStackTrace();  } finally {  work();  }  }  };    private void work() {  new Thread(uselessWorker, "cool thread name").start();  }  }