Have you had experience with reducing the efficiency of components like TableView, and how did you overcome it?

Yes, I have encountered performance issues when working with TableView in iOS. The main causes of reduced efficiency are usually related to improper cell reuse, heavy operations in the cellForRowAt method, as well as lack of optimization when loading images or data.

To overcome these problems, I used the following approaches:

• Cell reuse: always registered and reused cells via dequeueReusableCell(withIdentifier:) to avoid creating new instances.
• Asynchronous data loading: performed heavy operations, such as loading images from the network, in the background using GCD or libraries like SDWebImage.
• Caching: cached loaded data and images to avoid reloading them.
• Minimizing work in cellForRowAt: avoided complex calculations and database access in this method.
• Using estimatedRowHeight and automatic height calculation: for rendering optimization.

Example of cell reuse:

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "MyCell", for: indexPath)
    // Configure cell
    return cell
}