speed difference between knnclassify and fitcknn

Hi All,

I have been using knnclassify in my code

knnclassify(Test_Input, Train_Input, Train_Target,10,'euclidean','nearest')

and have decided to change it to use fitcknn due to the depreciation of knnclassify.

mdl = fitcknn(Train_Input,Train_Target,'NumNeighbors',10,'Distance','euclidean')

predict(mdl,Test_Input)

The fitcknn takes several times longer to solve.

I'm wondering if this is a known thing, and why? If not what is the best way I can debug, or sort out what is happening with my code?

Thank you.