Replace 'pow' with bit-shift to save ressources.

aentinger · aentinger · commit da92776b8c93 · 2021-04-28T11:27:17.000+02:00
diff --git a/src/ArduinoIoTCloudTCP.cpp b/src/ArduinoIoTCloudTCP.cpp
@@ -358,7 +358,7 @@ ArduinoIoTCloudTCP::State ArduinoIoTCloudTCP::handle_ConnectMqttBroker()
   }
 
   _last_connection_attempt_cnt++;
-  unsigned long reconnection_retry_delay = pow(2, _last_connection_attempt_cnt) * AIOT_CONFIG_RECONNECTION_RETRY_DELAY_ms;
+  unsigned long reconnection_retry_delay = (1 << _last_connection_attempt_cnt) * AIOT_CONFIG_RECONNECTION_RETRY_DELAY_ms;
   reconnection_retry_delay = std::min(reconnection_retry_delay, static_cast<unsigned long>(AIOT_CONFIG_MAX_RECONNECTION_RETRY_DELAY_ms));
   _next_connection_attempt_tick = millis() + reconnection_retry_delay;
 

Original file line number	Diff line number	Diff line change
`@@ -358,7 +358,7 @@ ArduinoIoTCloudTCP::State ArduinoIoTCloudTCP::handle_ConnectMqttBroker()`
`358`	`358`	`}`
`359`	`359`
`360`	`360`	`_last_connection_attempt_cnt++;`
`361`		`- unsigned long reconnection_retry_delay = pow(2, _last_connection_attempt_cnt) * AIOT_CONFIG_RECONNECTION_RETRY_DELAY_ms;`
	`361`	`+ unsigned long reconnection_retry_delay = (1 << _last_connection_attempt_cnt) * AIOT_CONFIG_RECONNECTION_RETRY_DELAY_ms;`
`362`	`362`	`reconnection_retry_delay = std::min(reconnection_retry_delay, static_cast<unsigned long>(AIOT_CONFIG_MAX_RECONNECTION_RETRY_DELAY_ms));`
`363`	`363`	`_next_connection_attempt_tick = millis() + reconnection_retry_delay;`
`364`	`364`