USB3-SATA-UASP1 with SanDisk Extreme 240GB (SDSSDX-240G) connected to iMac 27" (Late 2012) 2.9 GHz Core i5 (I5-3470S):
write (sequential): 348.817529 MiB/s
write (random 256K): 291.217492 MiB/s
write (random 4K): 32.666094 MiB/s
write (random 4K QD=32): 131.335316 MiB/s
read (sequential): 431.710549 MiB/s
read (random 256K): 293.746615 MiB/s
read (random 4K): 24.979641 MiB/s
read (random 4K QD=32): 169.664044 MiB/s