OK I am convinced ! You are correct.While we are waiting for others to participate...
Those figures, apart from the rounding to 2 minutes, sound reasonable. They indicate, as one would expect, that the actual performance on the last pass is inevitably less than the average performance over the whole test. The average never gets as low as the current performance, well not short of a very long test and even then only because of rounding error of the CB scores.
However, I was precise with my timings, taking them from the CineBench 'count-down clock' exactly, to the second, each time a pass was completed. As I indicated, I had a fair few dry-runs before my skills were up to speed.
If you repeat the test with precise timings you will find that (the first pass score + the calculated 2nd pass score according to my formula) divided by 2 = the CB given score after the second pass, and so on.
I confirmed that CB does indeed report cumulative averages on multipass tests, by running five separate tests in quick succession and comparing them with the first five results in the 30 minute test in my post#89. With five separate tests there will be no averaging.
Column 1 is the 30 min test CB reported numbers
Column 2 is todays five separate quick succession
Column 3 is the cumulative average calculated from column 2
It is obvious that column 1 and column 3 are very close so the CB long tests report cumulative averages.
Thanks for straightening me out, now back to the main plot!
I need to reissue my two previous posts about throttling because I have drawn the wrong conclusions from CBs reported numbers. The actual throttling after 10, 20 and 30 mins is greater. IMHO a throttling test should report the amount of throttling at the end of the test not the average over ten minutes.....or both.