The book referred to in the code is an "An Introduction to the Analysis of Algorithms" 2nd Edition by Michael Soltys http://www.msoltys.com/book Some of this code is based on python code found at https://github.com/michaelsoltys/IAA-Code.
Some of the algorithms have test files some of those also have benchmark tests written. To run the benchmark tool for the code cd into the appropriate directory and run go test -bench=..