This directory is for adding short performance tests that will be tracked in
Talos and receive regression alerts.
To add a test:
1) Create a test HTML file which includes <script src="util.js"></script>
2) In that file, have an onload handler which does the following:
i) Any pre-test setup needed.
ii) A call to perf_start().
iii) The test steps.
iv) A call to perf_finish().
3) Add your test to the perf_reftest_singletons.manifest file.
4) Add your test to the list in build/pgo/index.html.