In this part, we will generate random workloads to see how Lambda acts when incoming requests increase. To achieve that, we will use a load-testing tool, such as Apache Bench. In this chapter, I will be using hey, which is a Go-based tool, and is very efficient and faster than classic HTTP benchmarking tools due to Golang's built-in concurrency. You can download it by installing the following Go package from your terminal:
go get -u github.com/rakyll/hey
Be sure that the $GOPATH variable is set to be able to execute the hey command regardless of your current directory, or you can add the $HOME/go/bin folder to the $PATH variable.
