iMac (Retina 5K, 27-inch, 2019) 512GB SSD Speed ​​Test Result

# iMac (Retina 5K, 27-inch, 2019) 512GB SSD
# Using CentOS (VirtualBox)
cat /proc/cpuinfo | grep 'model name' | uniq
model name  : Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz

# Using Support Tools Utility from Atlassian.
# https://confluence.atlassian.com/kb/testing-disk-access-speed-for-a-java-application-818577561.html
java -jar support-tools.jar
Benchmark: RandomAccessFile

TOTALS
----    ----    ----    ----    ----
stat    avg median  min max
----    ----    ----    ----    ----
open    22,011  18,017  16,974  331,771
r/w     5,562   4,436   3,605   189,545
close   3,610   3,018   2,480   197,440
delete  13,847  11,191  10,354  269,315
----    ----    ----    ----    ----
All times are in nanoseconds.

# Writing 1 GB data on iMac (2019) 512GB SSD
dd if=/dev/zero of=test1 bs=64k count=16k conv=fdatasync

16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 5.95915 s, 283 MB/s

Raspberry Pi - 삼성 32GB EVO Plus Speed ​​Test Result

# Raspberry Pi - Samsung 32GB EVO Plus
cat /proc/cpuinfo | grep 'model name' | uniq
model name  : ARMv7 Processor rev 4 (v7l)

# Using Support Tools Utility from Atlassian.
# https://confluence.atlassian.com/kb/testing-disk-access-speed-for-a-java-application-818577561.html
java -jar support-tools.jar
Benchmark: RandomAccessFile

TOTALS
----    ----    ----    ----    ----
stat    avg median  min max
----    ----    ----    ----    ----
open    57,439  53,802  41,041  3,400,283
r/w     35,793  32,813  27,864  327,966
close   10,746  8,906   7,968   1,454,675
delete  56,798  57,448  42,812  285,050
----    ----    ----    ----    ----
All times are in nanoseconds.

# Writing 1 GB data on Samsung 32GB EVO Plus
dd if=/dev/zero of=test1 bs=64k count=16k conv=fdatasync
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 83.8615 s, 12.8 MB/s

See Image

Conclusion