jsperf.com has been dead for over a year now, Mathias has said he doesn't intend to maintain it himself.
Also, it's within a namespace right now. We'll see what the name ends up being if it gets a standalone domain.
Still unfortunate.
JsPerf was one thing (and still is, as it seems to be on a rework) and this, although similar, is another. It sounds like hijacking the success of the former to grant success to the latter.
"JsPerformance", "JSBenchmark", "PerfJs"... there are a lot of names to choose from, copying an used one only because it's not protected by a trade mark doesn't sound nice to me.