javaandroidperformanceandroid-studioandroid-ide

how to know the performance of part of code using android studio

I want to know the performance of little fragment of my code using android studio. I am writing a small part of my code here to explain my question

params.rightMargin = (int) (getResources().getDimensionPixelOffset(R.dimen.rightAndLeftMargin));
params.leftMargin = (int) (getResources().getDimensionPixelOffset(R.dimen.rightAndLeftMargin));

alternatively these lines can also be written as:

int margin = getResources().getDimensionPixelOffset(R.dimen.rightAndLeftMargin);
params.rightMargin = margin;
params.leftMargin = margin;

so with the help of android studio IDE how to compare the performance(like memory uses, CPU load, execution time etc.) of these two codes.

NOTE: This is not the only case I have dozens of same cases therefore I would like to have general solution for all types of codes.

Solution

  • With Profiler built-in into Android Studio you can easily see what methods on what threads are being called in a selected time frame. Personally I recommend using a Flame Chart to see what operation takes most amount of time.

    Keep in mind that having a profiler attached to your app's process slows it down significantly, so if certain method call took e.g. 1 second, in reality it will be way less.