First create a test csv file using datagen.cpp
c++ datagen.cpp && ./a.outA 1.7gb file named test.csv will be created. Here's the first 10 lines of test.csv
field1,field2
0.163905,0.917459
0.701493,0.483015
0.493611,0.814333
0.504735,0.58633
0.801685,0.932856
0.496236,0.328614
0.667945,0.693764
0.868341,0.0403233
0.375637,0.789386
Next, test out indivisual processing files
cd cpp
c++ sd.single.cpp && time ./a.out