Well, I'm used to mangle tons of data from many different sources and formats, but I didn't know about JSON. I only figured out about the data format and potential problems. That's why I started this thread! As some monks pointed out, JSON module was what I needed this time... at least for a reasonable number of records! :-)

BTW: in Re^2: Move data into AoH I said: "if I had to manage this structure in memory". I meant: "if I had to manage this dataset in memory".