New Ruby profiler created by John Hawthorne from the Rails core team. Spelled v-e-r-n-i-e-r. John was scheduled to talk about it in a keynote at RailsConf and had been doing a lot of streaming work on it. Not yet battle-tested relative to established profilers like Speedscope, but Stephen Margheim flagged it in this panel as something worth knowing about for those who need a Ruby profiler.