Hacker News Reader

True. But also Excel probably collapses into a black hole going straight to hell trying to handle 21GB of data.

Excel .xlsx files are limited to 1,048,576 rows and 16,384 columns.

Excel .xls files are limited to 65,536 rows and 256 columns.

21GB/s, not 21GB ...

mawk would handle a 21 GB csv (or maybe one true awk) fast enough.