It is comparable to CSV for space effiency (but much better than XML or JSON). The main difference is the lack of escaping, which is what makes CSV slow to par

It is comparable to CSV for space effiency (but much better than XML or JSON). The main difference is the lack of escaping, which is what makes CSV slow to parse and error prone. With escaping you have to parse from the start of the file, which makes multi-threading hard, which limits how fast you can parse it.