Learning Functional Programming in Go

How to run our tests

In the first benchmark test, we examine the performance of computing the eighth number in the Fibonacci sequence. Note that we pass the -bench=. argument, which means run all benchmark tests. The ./... argument means to run all the tests in this directory and all the child directories as well:

When we request the eighth number in the sequence, the simple recursive implementation runs faster than the memoized and channeled (optimized) versions, 213 ns/op compared to 1302 ns/op and 2224 ns/op, respectively.

In fact, when the simple version is executed once, it only takes 3.94 ns/op.

One very cool feature of Go's benchmark ...