They had three measures: A) Flops. Operations per second. B) Cost. Dollars per hour. C) Runtime. Seconds per task.
I expected the formula to be Flops/Cost, resulting in units of operations per dollar.
Instead it was computed as Flops / (Cost * Runtime), to get some units that don't make sense to me — operations * tasks per dollar seconds?
So faster CPUs get work done more quickly and may justify a higher cost per hour.
Ah, the graph is wacky, but the text makes sense, looks like a disconnect:
1. C4A Axion: $2.16 reported cost per hour, test took average of 9 seconds per run: cost approximately 0.005 dollars.
2. T2A Ampere Altra: $1.85 reported cost per hour, test took average of 17 seconds per run: cost approximately 0.009 dollars.
3. C4 Xeon Platinum EMR: $2.37 reported cost per hour, test took average of 17 seconds per run: cost approximately 0.011 dollars.