Recyclerview Performance

[dyangcoding]

1 recyclerView.setHasFixedSize(true), this do improve the profermance, only for the case that all item of view has fixed width and height.

2 recyclerView.setItemViewCacheSize(20);
recyclerView.setDrawingCacheEnabled(true);
recyclerView.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH);
Not sure about this

3 set OnClickListener once in onCreateViewHolder() and call through an interface a listener outside of the Adapter, passing the clicked view. don't create extra objects all the time. Already done

4 by updateing adapter, consider do not collect all items all the time, take advantage of the following methods may help, not tests
adapter.notifyItemRangeInserted(rangeStart, rangeEnd)
adapter.setHasStableIds(true);
adapter.notifyItemRemoved(position);
adapter.notifyItemChanged(position);
adapter.notifyItemInserted(position);
this requires that data which to be served has unique ids.