pin performance

[livius]

hi,

i have tested pin read performance
and it is like this:
read 1000 times pin value:
20558
21

this is my test file

from machine import Pin
import time
dht_pin=Pin('P9', mode=Pin.OPEN_DRAIN, pull=None)
am = time.ticks_ms()
au = time.ticks_us() #comment this line if you have not enabled this in firmware
for i in range(1001):
	dht_pin()
print(time.ticks_us()-au) #comment this line if you have not enabled this in firmware
print(time.ticks_ms()-am)

and i see that i can read one pin value in 21 us
but specification for e.g. dht11/22 is like this:

Bit '0' : ~54uS Low and ~24uS High
Bit '1' : ~54uS Low and ~70uS High

i see that i can miss high value because its duration is 24us
how can we improve pin read time?

for test i enabled in firmware time_us()
but previously tested this without any change

[livius]

I see some possibilities in speed up things by batch read
I will try to write some code and back with results