$ time dd if=/dev/zero of=./data.dat bs=8192 count=1000000
1000000+0 records in
1000000+0 records out
8192000000 bytes (8.2 GB, 7.6 GiB) copied, 55.6718 s, 147 MB/s

real	0m56.642s
user	0m0.572s
sys	0m25.776s

$ time dd if=./data.dat of=/dev/null
16000000+0 records in
16000000+0 records out
8192000000 bytes (8.2 GB, 7.6 GiB) copied, 48.1263 s, 170 MB/s

real	0m48.132s
user	0m7.672s
sys	0m33.244s

$ iperf -c rock64.local
------------------------------------------------------------
Client connecting to rock64.local, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[  3] local 192.168.100.5 port 48250 connected with 192.168.100.56 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  1.09 GBytes   940 Mbits/sec
$  !!
iperf -c rock64.local
------------------------------------------------------------
Client connecting to rock64.local, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[  3] local 192.168.100.5 port 48252 connected with 192.168.100.56 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  1.09 GBytes   940 Mbits/sec

import sensor
import image
import lcd
import KPU as kpu

lcd.init()
sensor.reset()
sensor.set_pixformat(sensor.RGB565)
sensor.set_framesize(sensor.QVGA)
sensor.run(sensor.get_id())
task = kpu.load(0x300000) 
anchor = (1.889, 2.5245, 2.9465, 3.94056, 3.99987, 5.3658, 5.155437, 6.92275, 6.718375, 9.01025)
a = kpu.init_yolo2(task, 0.5, 0.3, 5, anchor)
while(True):
	img = sensor.snapshot()
	code = kpu.run_yolo2(task, img)
	if code :
		for i in code :
			a = img.draw_rectangle(i.rect())
	a = lcd.display(img)
a = kpu.deinit(task)