Feather, based on the Apache Arrow format, is a lot faster than CSVs, and there's good support in both R and Python for it, maintained by Hadley Wickham (who ha

Feather, based on the Apache Arrow format, is a lot faster than CSVs, and there's good support in both R and Python for it, maintained by Hadley Wickham (who has developed Almost Ever R Package You've Heard Of) and Wes McKinney (who is the BDFL of pandas) respectively. It also involves less inferring of data types using heuristics.