Greetings!
The switch itself does not appear to be performing any routing (the 'ip routing' command is not present in the posted configuration), so it is likely that any latency being observed is being introduced by a device upstream of the switch.
Are you also observing latency between the switch and either of the upstream firewall IP addresses (192.168.153.250 or 192.168.155.250) or the switch default gateway 192.168.105.250?