What optimization methods have you applied to improve the performance of software products?

To improve the performance of Android applications, I applied the following optimization methods:

• Memory management optimization: avoided memory leaks, used weak references (WeakReference), released resources at appropriate places.
• Profilers usage: Android Profiler to identify bottlenecks in CPU, memory, and network.
• UI optimization: minimized redraws, used ViewHolder in RecyclerView, avoided heavy operations on the main thread.
• Asynchronous processing: used coroutines, AsyncTask (deprecated), RxJava for executing long-running operations outside the UI thread.
• Data caching: used image caching (Glide, Picasso) and data caching to reduce network load.
• Resource loading optimization: reduced image sizes, used vector drawables, lazy loading.

Example of using ViewHolder for RecyclerView optimization:

class MyAdapter(private val items: List<String>) : RecyclerView.Adapter<MyAdapter.ViewHolder>() {
    class ViewHolder(val textView: TextView) : RecyclerView.ViewHolder(textView)

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val textView = LayoutInflater.from(parent.context)
            .inflate(android.R.layout.simple_list_item_1, parent, false) as TextView
        return ViewHolder(textView)
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        holder.textView.text = items[position]
    }

    override fun getItemCount() = items.size
}