Arvados

after #8029 outputs comparison will be easier if Arvados is able to show those times in a Gantt chart https://en.wikipedia.org/wiki/Gantt_chart

As far of implementation, one option is to use something like python gantt¹ and use the API to get the start and end dates of every tasks.

the tricky part could be to determine the dependencies between tasks, so we can clearly visualize the critical path.

[1] http://xael.org/pages/python-gantt-en.html