I was curious and get vastly different numbers on my machine. I grabbed this and compiled it with gcc https://github.com/lemire/Code-used-on-Daniel-Lemire-s-bl

I was curious and get vastly different numbers on my machine. I grabbed this and compiled it with gcc https://github.com/lemire/Code-used-on-Daniel-Lemire-s-blog/blob/master/2024/01/13/bandwidth.cpp https://github.com/lemire/Code-used-on-Daniel-Lemire-s-blog/... g++ -std=gnu++17 -O3 -o bandwidth bandwidth.cpp && ./bandwidth > 50.0 > ... 50 GB/s, it drops slowly to 45GB/s with 32 threads) sudo hdparm -T /dev/nvme0n1 > Timing cached reads: 58222 MB in 1.99 seconds = 29230.67 MB/sec It's a good lower bound though