cardillo
commented
9 years ago see http://wesmckinney.com/blog/mastering-high-performance-data-algorithms-i-group-by/ for some insight into how this is done in pandas.
Open cardillo opened 9 years ago
cardillo
commented
9 years ago see http://wesmckinney.com/blog/mastering-high-performance-data-algorithms-i-group-by/ for some insight into how this is done in pandas.
such as avoiding copies, making efficient use of memory, parallelization, etc.