Any Faster RMS Value Calculation in C?

Question

I am writing a software for a small 8-bit microcontroller in C. Part of the code is to read the ADC value of a current transformer (ZCT), and then calculate the RMS value. T

Answer 1

To find the square root use the below app note from microchip for 8 bit controllers

Fast Integer Square Root

which is much fast and can find square root in just 9 loops