Because hes only using a single CPU core I'm not sure how much the CPU would have helped but you're right he hasn't quantified this. He's the lead developer of

Because hes only using a single CPU core I'm not sure how much the CPU would have helped but you're right he hasn't quantified this. He's the lead developer of io_uring a new kernel mechanism for doing I/O that is much more effecient for these large IOPS workloads and it itself has been getting lots of optimisation in every recent kernel so it could be both.