Timing is disabled by default.
To enable timings, add the following to the root node of your
configurable-analysis XML:

```xml
<sensei timing="true" summarize-timing="true" timing-rank-modulus="1">
 ...
</sensei>
```

+ The value of the `timing` attribute is evaluated as a boolean
  which defaults to false if the attribute is not present.
  When true, timings are reported.
+ The `summarize-timing` attribute can be used to
  set how timing information is presented.
+ The `timing-rank-modulus` is used to determine which
  ranks of the MPI job will print their timing information.