What primary timings does the Waterfall analysis view focus on?

The Waterfall analysis view primarily focuses on W3C timings, which refer to a standard set of timing metrics that are essential for analyzing web performance. These timings capture the different phases of a web request, allowing users to see how long each part of the loading process takes—from the time a request is initiated to when the response is received.

Using W3C timings, the Waterfall view effectively illustrates various components of page load performance, such as DNS lookup time, connection time, and server response time. This detailed breakdown provides insights into potential bottlenecks in the loading process, enabling optimization efforts to improve overall web performance.

Other options like custom timings or JavaScript performance metrics may provide relevant information, but they do not represent the primary focus of the Waterfall analysis view, which is centered on the standardized W3C timings to ensure comprehensive web performance monitoring. Server response times are an important aspect of the W3C timings but do not encompass the full range of data that W3C timings represent in the waterfall context.