While working on a Nerves project, you will likely do most hard work in the
host environment. This means you get to develop features quickly, and when
are ready, you simply deploy your known working firmware to your embedded
devices. This however can lead to a situation where the code runs really well
on your i7 powered beast computer, but when deployed on a less
powerful Raspberry Pi 0, for example. Nothing will be broken, but things are just
too slow. There are a number of solutions to this problem and in this post,
I will walk you through a simplified real world example of one possible solution
of using an Erlang NIF to speed
up one particular functionality.