Many users often need to manipulate data from the chromeperf dashboard in a way that the frontend cannot accommodate. Currently, the easiest way to access the data is through the api. However, this requires users to know about the api, know how to use it, know how to program, know oauth, know colab, etc.
It would be easy to add a button to chart-section to export a CSV containing the data that the user has selected. The CSV could contain a column for histograms json if the user has selected points in the main chart. Users could then manipulate the data by importing the CSV into any number of tools.