úÎfQ0non-portable (requires IA-32 processor and GHC) provisionalmartin@grabmueller.deNoneBReturn the number of clock cycles since the machine this function A is called on has been powered up. Note that the value returned : may be inaccurate if the program is run on some hardware  virtualization layer. ?Especially on multi-core processors and when using hibernating 6 operating systems, the values returned may be bogus. For more information about the rdtsc instruction, see   "http://en.wikipedia.org/wiki/RDTSC  rdtsc-1.3.0.0System.CPUTime.Rdtscrdtsc