Dictionaries of integers to array of integers - dataset for testing reading speed of irregular files

Generated by https://github.com/abelsiqueira/faster-python-using-julia-blogposts/blob/03a8d5a1a5fb99fa9071b3a5980eaa627ed7b4d9/post3/src/julia/gen_dataset.jl

Example file: 

1#1024
271#31,32,33,301
403#99,105