Just for the fun of it, test was done on Windows Subsystem for Linux (WSL)
Code:
Samsung EVO+ 256GB UHS-I microSDXC U3
File format: NTFS
random random
kB reclen write rewrite read reread read write
20480 4 41855 50204 185746 208807 136151 44118
20480 16 58528 64611 398180 528423 410766 38576
20480 512 57546 62429 1021094 1175788 1078178 47206
20480 1024 64656 63245 848842 1021349 984285 52021
20480 16384 64553 65763 995677 1044165 950729 68686