Deprecated Catapult GitHub. Please instead use http://crbug.com "Speed>Benchmarks" component for bugs and https://chromium.googlesource.com/catapult for downloading and editing source code..
Breakdown metrics is useful, as it has been manifested for FCP metric. It provides finer measurements for the performance of various categories of activities than the top level (FCP, FMP) metrics. However, FCP is very early in page load, so the results are more or less bias towards the early activities. We can provide a similar set of breakdown metrics ending at TTI to cover a longer duration of page load.
maxlgu
commented
5 years ago
Breakdown metrics is useful, as it has been manifested for FCP metric. It provides finer measurements for the performance of various categories of activities than the top level (FCP, FMP) metrics. However, FCP is very early in page load, so the results are more or less bias towards the early activities. We can provide a similar set of breakdown metrics ending at TTI to cover a longer duration of page load.