If you're gathering data through multiple sensors data from one end, and pushing it out to network from another, the performance of the 4-core ARM CPU should be the least of your concerns. You are never going to reach 100% CPU utilization unless you're doing something very wrong. Contemporary sensor protocols are slow, to say the least. Same for the network end. You'll saturate atleast one of those two ends before running out of CPU power. Use Python. It is easy, fast and has a ton of library support for numerical analysis. Stop buying into the hype please.