What it means to be "faster"? Is it having a higher I/O throughput? Or, is it having a lower latency on the 95th or 98th percentile? Also, the slides give litt

What it means to be "faster"? Is it having a higher I/O throughput? Or, is it having a lower latency on the 95th or 98th percentile? Also, the slides give little information about scalability of the two models. From what I know, the performance of non-blocking I/O should degrades more gracefully in presence of high concurrency. I would have liked to see some numbers about that.