@Override
  public void draw(Canvas canvas) {
    if (FrescoSystrace.isTracing()) {
      FrescoSystrace.beginSection("RoundedDrawable#draw");
    }
    mDelegate.draw(canvas);
    if (FrescoSystrace.isTracing()) {
      FrescoSystrace.endSection();
    }
  }
If both the radii and border width are zero, there is nothing to round.
drawee/src/main/java/com/facebook/drawee/drawable/RoundedDrawable.java