Using synchronous IO, our enterprise SSD testbed cannot reach 600k IOPS. With io_uring, we can do more than 400k IOPS on a single CPU core without any extra performance tuning effort. Hitting 1M IOPS on a real SSD takes at most 4 CPU cores, so even the Micron X100 and upcoming Intel Alder Stream 3D XPoint SSDs should pose no challenge to our new benchmarks.