Note: antminer-zabbix-check script uses curl and jq (make sure to install them)
Returns data in less than 0.03 seconds.
$ time ./antminer-zabbix-check 192.168.88.249 4028 stats "GHS 5s"
"828.68"
real 0m0.028s
user 0m0.008s
sys 0m0.000s
Zabbix: Configuration -> Templates -> Import -> Import