802.11 rx buffer and promiscuous mode

[Yolo1999]

When I set esp to promiscuous mode and analyze each packet that esp get...

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esp_wifi_start();
esp_wifi_set_promiscuous(true); esp_wifi_set_promiscuous_rx_cb(&wifi_sniffer_packet_handler);

What is that buffer size of rx? I guess that I drop packet if I didn't analyze them fast...

And,when esp in promiscuous mode, does it disable to tx WIFI? Because I want to save battery as much as I can

Thank you!