Hey @Acehigh
My nss (only) branch is based on bitthief's early implementations of nss offloading.
The nss-wifi branch has as its starting point the previous branch to which @qosmio's modifications have been added to implement wifi-offloading.
In the case of the nbg7815, the inclusion of support for Wi-Fi offloading results in a firmware that makes its use practically impossible and leaves the router practically blocked and that most of the time it can only be unlocked through the serial port.
It is for this reason that no compilation with such support has yet been made public.
However, it is possible to use the nss-wifi branch to build a firmware with support for nss-offloading but eliminating the part corresponding to wifi. (That's what I'm currently trying and it seems to work perfectly)
For more information you can read from this post onwards.
With respect to the performance of the Wi-Fi network when this implementation is available, I venture that there will not be a significant increase in performance, but what there will be is a decrease in the processor load that will become practically null when currently the intensive use of wifi can even saturate the CPU.
The biggest increase in Wi-Fi performance will come when 160Mhz support is implemented in this device.