When working with the Repeater and DataList controls, it's essential to consider _________ optimization for efficient rendering.

The correct option is "Performance." When using the Repeater and DataList controls, optimizing performance is crucial to ensure efficient rendering of data. Performance optimization techniques such as caching, data retrieval strategies, and minimizing server round trips can significantly enhance the responsiveness and scalability of web applications. Other options like "Memory," "Code," and "Network" are relevant factors but do not directly address the need for optimizing rendering performance in the context of these controls.