Computation modes refer to how the functions in the library interact with the data that the data management part of the library handled. This can be divided into 3 types of interactions, batching, online and distributed. While batching and distributing online types are just efficient code handling of large data sets, distributed processing falls under parallel processing. One of the reasons why the computation is quick is simply because the data being accessed has been efficiently organized by the data management part of the library. Additionally, many functions in the library have the potential to be used by two or even three different computation modes. This gives the developer a lot of freedom in deciding how to handle the data. If the data set is not so large, it may be much better to do batch processing. Whereas if the data set is actually very large, it may make a lot more sense to use distributed processing.