C3 context only (claim not reproducible here: vendor used 32 Graviton3 cores + a second load-generator machine).
This box: 8 vCPU Intel Xeon, 15 GB RAM; client and server on the same box. redis-benchmark (Redis 8.0.2 tools), -c 50 -n 1000000 -d 100 -t set,get, -P 16 and -P 1.
Redis 8.0.2 (apt, default config, single-threaded I/O) on 6379; KiviDB 1.1.0 (6 worker threads, io_uring) on 6380. Times are UTC+8.

== port 6379 pipeline 16 11:22:27
SET: 766871.12 requests per second, p50=0.855 msec
GET: 703234.88 requests per second, p50=0.919 msec
== port 6379 pipeline 1 11:22:30
SET: 140449.44 requests per second, p50=0.175 msec
GET: 142348.75 requests per second, p50=0.175 msec
== port 6380 pipeline 16 11:22:44
SET: 1194743.12 requests per second, p50=0.279 msec
GET: 1526717.62 requests per second, p50=0.231 msec
== port 6380 pipeline 1 11:22:46
SET: 134012.33 requests per second, p50=0.183 msec
GET: 143245.95 requests per second, p50=0.183 msec