The following benchmarks compare different implementations of the same algorithm.
Some benchmarks are available on PolynomialFeatures at Benchmark of PolynomialFeatures + partialfit of SGDClassifier.
The following benchmarks were implemented in other repositories. The first one measures differents way to write the dot product in C++ using a couple of processors optimization such as branching or AVX instructions.
The second one looks into the implementation of a logistic regression with python, C++ or C++ optimization provided by other libraries.
The next benchmark compares the gain obtained by playing a criterion for decision tree regressor.