[ericb]

> The problem with a lot of UI tests is that you might need to add artificial slowness to make the tests more likely to pass.

For most real-world performance tests, you should be adding plenty of delay. The average delay on the web between pages for real users runs around 50 seconds, last I looked (which was a while ago, admittedly).

If your app uses keepalives, or polling, or websockets, running your users really fast is going to make your test less accurate and you may get a false positive.