[x] legend entries could form a table so each part of entry will be aligned for readability
[x] legend entries having "NA" are ambiguous
Is that because we are blocked or because the tool is out-of-memory? It's ambiguous. Could the NA be changed to more detail : out-of-memory | tool doesn't support task | WIP in adding to db-bench. Something like that? Those words are long though, so maybe achieve that via an acronym which would need it's own secondary legend.
good feedback from Matt