You may be interested in the work myself and some coauthors have done on data structures and algorithms for streaming aggregation. GitHub repo for the code, whi

You may be interested in the work myself and some coauthors have done on data structures and algorithms for streaming aggregation. GitHub repo for the code, which high level descriptions of their properties and pointers to papers: https://github.com/IBM/sliding-window-aggregators https://github.com/IBM/sliding-window-aggregators