MATLAB: How to measure how long it takes to run on test set

Question

% Make a prediction for the test set

Y_knn = knn.predict(Xtest);

Answer 1

See tic toc: https://www.mathworks.com/help/matlab/ref/tic.html

or timeit(): https://www.mathworks.com/help/matlab/ref/timeit.html

or use the profiler: https://www.mathworks.com/help/matlab/matlab_prog/profiling-for-improving-performance.html