After `iron-node` has loaded, activate the Dev Tools profiling, and then hit <kbd>Cmd</kbd><kbd>R</kbd> to rerun the tests.
Or:
```
$ devtool node_modules/ava/profile.js <test-file>
```
Once the Dev Tools window has loaded, activate Memory or CPU profiling, and then hit <kbd>Cmd</kbd><kbd>R</kbd> to rerun the tests.
As soon as the tests finish, stop the recording and inspect the profiler results. The flamegraph can be displayed by choosing `Chart` from the drop down on the `Profiles` tab (other views include `Tree (top down)` and `Heavy (bottom up)`).
You may also want to check out the Settings page in Dev Tools and enable one or more options in the Profiling section.
##### Helpful resources
- [An introduction to Node.js debugging with `devtool`](http://mattdesl.svbtle.com/debugging-nodejs-in-chrome-devtools).
- [A video introduction to Chrome DevTools CPU and Memory profiling](https://www.youtube.com/watch?v=KKwmdTByxLk).