What is the maximum ADC sampling frequency we can have on ESP32

[regandgo]

Hi there,
I have made some tests on my ESP32-DevKitC board. (VCC 3.3V)
The setting I used was: ADC1 channel 0; ADC_WIDTH_12Bit, ADC_ATTEN_11db.
Non stop reading of 1024 samples in a loop takes 22 ms.
So, the max sampling frequency is 46kHz.

But, in my project I need, at least, 100kHz.
Does anyone have an idea how to increase the sampling frequency?