We should have a way to calculate how long each item in your codebase takes to compile. Conceptually this would work by grouping the measureme data by DefId/NodeId or some other identifier rather than by the query name. We can then output a sorted list of items by how long each takes.

For example, the output might look like this:

$ summarize code-profile /path/to/rustc-results

Total time in rustc: 120 seconds

----------------------------------------
| % time | Item                        |
| ------ | -----------------------------
| 20.4%  | example::foo::bar::clone()  |
| 10.2%  | example::baz::widget::bla() |

(more rows)

This will require changes to the profiling code in rustc to record DefIds or NodeIds for each query.