翻转字节数组 - 提高性能

I have some code that manages data received from an array of sensors.The PIC that controls the sensors uses 8 SAR-ADCs in parallel to read 4096 data bytes. It means it reads the most significant bit for the first 8 bytes; then it reads their second bit and so on until the eighth (least significant bit).I have some code that manages data received fro