Performance degrades severely when the number of producers increases.

[bigKoki]

In the performance test of MPSC, when simulating 2 and 4 producers respectively, Crossbeam's performance is much better than Java-Disruptor, but when simulating 8 and 16 producers, Crossbeam is worse than Java-Disruptor. My testing device has 16 cores and 64GB. May I ask what caused this problem?

Here are the results of two experiments, the first with 2 producers and the second with 8 producers. The abscissa represents the buffer size and the ordinate represents the time consumption.