[radikalus]

My quick look at this shows that unless you cython wrap the call -- this is going to be slower than using pandas' to_datetime on anything with an array layout.

I've never really spent much time looking at pandas' to_datetime but I believe it has to handle a lot of variety in what you pass to it, which probably cause a bit of a perf hit. (Lists, arrays, Series)

http://dl.dropboxusercontent.com/u/14988785/ciso8601_compari...