An important goal during the development of treestats, has been to provide not only a vast collection of phylogenetic tree statistics, but also ensure that calculation of these statistics is fast and reliable. During development, results of the developed code have continuously been tested against reference code from other packages. After ensuring correctness, profiling methods have been used to improve calculation speed.
Tree size is an important factor in determining calculation performance. We have varied tree size from 10 to 1000 in logarithmicly appropriate steps, calculating statistics for 10 randomly generated Yule trees per tree size.