The single number answer is going to be utterly dominated by the past 5 years, so it's not too difficult to answer. If you wanted a time-series that shows how

The single number answer is going to be utterly dominated by the past 5 years, so it's not too difficult to answer. If you wanted a time-series that shows how this number evolves over time, you would end up with a very interesting history of tech book. Something like Milton Friedman's "A Monetary History of the United States." I would buy it / crowd fund it. If all you really want to know is "number of cycles" you should probably research oscillator manufacturers. If you're actually interested in the "volume of compute" you should start with 10K's for Intel and Xilinx, and fan out to their competitors. Use market capitalization over time as a filter for inclusion in your tally, as you can't research every manufacturer.