Showing the CPU+Battery utilization graph for a sample app is a pretty dubious way to demonstrate the performance impacts of swizzling sendAction:to:from:forEvent:<p>It may indeed be a negligible impact as they claim, but using the Time Profiler instrument they could show exactly how much time is spent in the main queue on their swizzled code which would be a much better indication of whether or not the performance impact is negligible than eyeballing a cpu utilization graph.