To optimize the performance of the provided code segment which uses a custom attribute isOnSaleFlag to filter products, the Digital Developer should:
* B. Avoid post-processing and use the isOnSaleFlag attribute as a search refinement.Using the custom attribute isOnSaleFlag directly in the product search query as a refinement can significantly enhance performance. This approach minimizes the number of products retrieved and processed in the loop by filtering at the search level rather than iterating through all products and filtering them post-retrieval. This reduces the overhead on the application and speeds up the execution time by leveraging the indexing and optimization features of the platform's search engine.