Data bandwidth and latency

Hello,

Today I tried to make some bandwidth test but no luck to get more than 1 message per second (:

 channel_settings {
   tx_power: 23
   modem_config: Bw500Cr45Sf128
   psk: "\327\241i\317\275\025y\301F\273t:\217\346@F\371\344\345\274\371D\336\007W\335\001i\336~Nc"
   name: "G1"
 }

Pyhton script send 6 messages via first device

import time
import meshtastic
interface = meshtastic.StreamInterface("COM6")
for x in range(6):
  interface.sendText(str(x),'^all', False, False) 

and meshtastic script display messages on second device:

Trigger powerFSM 5
Transition powerFSM transition=Received text, from=ON to=ON
Received: {'from': 2988736560, 'to': 4294967295, 'decoded': {'data': {'typ': 'CLEAR_TEXT', 'payload': 'MA==', 'text': '0'}}, 'id': 2005531750, 'rxSnr': 4.75, 'rxTime': 315965859, 'fromId': '!ac67b2248030', 'toId': '^all'}
Trigger powerFSM 3
Trigger powerFSM 5
Transition powerFSM transition=Received text, from=ON to=ON
Received: {'from': 2988736560, 'to': 4294967295, 'decoded': {'data': {'typ': 'CLEAR_TEXT', 'payload': 'MQ==', 'text': '1'}}, 'id': 2005531751, 'rxSnr': 5.0, 'rxTime': 315965861, 'fromId': '!ac67b2248030', 'toId': '^all'}
Trigger powerFSM 3
Trigger powerFSM 5
Transition powerFSM transition=Received text, from=ON to=ON
Received: {'from': 2988736560, 'to': 4294967295, 'decoded': {'data': {'typ': 'CLEAR_TEXT', 'payload': 'Mg==', 'text': '2'}}, 'id': 2005531752, 'rxSnr': 5.5, 'rxTime': 315965863, 'fromId': '!ac67b2248030', 'toId': '^all'}
Trigger powerFSM 3
Trigger powerFSM 5
Transition powerFSM transition=Received text, from=ON to=ON
Received: {'from': 2988736560, 'to': 4294967295, 'decoded': {'data': {'typ': 'CLEAR_TEXT', 'payload': 'Mw==', 'text': '3'}}, 'id': 2005531753, 'rxSnr': 5.0, 'rxTime': 315965865, 'fromId': '!ac67b2248030', 'toId': '^all'}
Trigger powerFSM 3
Trigger powerFSM 5
Transition powerFSM transition=Received text, from=ON to=ON
Received: {'from': 2988736560, 'to': 4294967295, 'decoded': {'data': {'typ': 'CLEAR_TEXT', 'payload': 'NA==', 'text': '4'}}, 'id': 2005531754, 'rxSnr': 5.25, 'rxTime': 315965866, 'fromId': '!ac67b2248030', 'toId': '^all'}
Trigger powerFSM 3
Trigger powerFSM 5
Transition powerFSM transition=Received text, from=ON to=ON
Received: {'from': 2988736560, 'to': 4294967295, 'decoded': {'data': {'typ': 'CLEAR_TEXT', 'payload': 'NQ==', 'text': '5'}}, 'id': 2005531755, 'rxSnr': 5.25, 'rxTime': 315965867, 'fromId': '!ac67b2248030', 'toId': '^all'}

Why it still take 1-2 seconds to send/receive 1 message?