1. In order to maximize throughput, we need to set the uart print baud rate at 921600 or more (idf.py menuconfig --> Component config --> ESP32-specific --> UART console baud rate --> 921600(or 1500000)) and don't print too much log;
2. We can only test notify or write throughput at the same time, this demo default to test the notify throughput, if want to test the write throughput,
please set: idf.py menuconfig --> Component config --> Example 'GATT SERVER THROUGHPUT' Config ---> then select the 'test the gattc write throughput' option
4. Should change the CPU frequency to 160MHz or 240MHz in the idf.py menuconfig --> Component config ---> ESP32-specific ---> CPU frequency (160MHz or 240 MHz)
5. Should change the bluetooth controller and Bluedroid run in different Core in the idf.py menuconfig --> Component config ---> Bluetooth ---> The cpu core which bluetooth controller run (Core 0 (PRO CPU)) & Bluedroid Enable ---> The cpu core which Bluedroid run (Core 1 (APP CPU))