tabular-data-differ/tests/b2.csv

A very efficient library for diffing two sorted streams of tabular data, such as CSV files.

id,a,b,c
02,a2,b2,c2
03,a3,b3,c3
03,a3,b3,c3
03,a3,b3,c3
04,aa4,bb4,cc4
07,a7,b7,c7
07,a7b,b7b,c7b
08,a8,b8,c8
09,a9,b9,c9
10,a10,b10,c10