How are resources categorized in the aggregated Waterfall view?

In the aggregated Waterfall view, resources are categorized by size and frequency, which provides a comprehensive understanding of how different elements on a web page contribute to performance. This categorization allows users to see which resources are the largest or most frequently requested, helping to identify potential bottlenecks or areas for optimization.

Understanding both size and frequency is crucial for performance tuning, as larger resources can take longer to load, and frequently requested resources can impact overall load time when not managed properly. By visualizing both dimensions, teams can prioritize their efforts more effectively, focusing on optimizing the resources that will yield the most significant performance improvements.

The other options do not capture the full scope of how resources are analyzed in the Waterfall view. For instance, categorizing resources solely by duration overlooks important factors like size and request frequency. Similarly, labeling resources as 'fast' or 'slow' based on server response does not consider the actual impact of resource size or how often they are requested. Lastly, while user experience metrics are valuable for overall performance assessment, they do not specifically align with the raw categorization of resources as seen in the Waterfall visualization.