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.