# Parallel UBUS calls All `operate` operation and `get` operation with a depth up to 'USP_SUBPROCESS_DEPTH(2)' runs in a parallel subprocess to avoid blocking the next call. ```console root@iopsys:~# time ubus call usp.raw get '{"path":"Device."}' >/dev/null & root@iopsys:~# time ubus call usp.raw get '{"path":"Device.Users."}' >/dev/null real 0m 0.07s user 0m 0.00s sys 0m 0.00s root@iopsys:~# real 0m 1.86s user 0m 0.05s sys 0m 0.00s [1]+ Done time ubus call usp.raw get "{\"path\":\"Device.\"}" >/dev/null root@iopsys:~# ```