Measuring performance improvements

Hi all,

We have some old, non-performant code that we plan to work on over the next few sprints. I know you can see code times in toolbox, but does anyone know if that data is downloadable as a spreadsheet or similar? I'd like to put some outcomes around the development work but I'm not finding a good way besides picking a point in time to point a mouse on toolbox (which is not that precise).

Thanks,
Mark