Performance drop on Wifi (30%) and BT (60%) with latest build?

[cyberman54]

I am using ESP32 for wifi and bluetooth packet sniffing, using monitor mode of ESP32 wifi stack and using ESP32 BT/BLE stack.

I assessed that with latest build of esp-idf libraries the overall performance on both wifi and bt sniffing decreased dramatically.

Test setup were 2 identical hardware boards with identical application software. One application software was compiled with esp-idf libraries build before 26th Nov. 18, and the other one after this date.

The board build with latest code sniffs ~60% less bluetooth and ~30% less wifi devices compared with that one build on older code (under same conditions in same time).

I have no idea how to further analyze this. Since both BT and Wifi are affected this could mean a general performance drop on core 0 (running BT and Wifi stack), or a problem with the 2,4 GHz radio driver?

My code for bt and wifi sniffing can be found here:

Wifi sniffing
BT sniffing