After some searching I failed to find a thorough comparison of fastparquet and pyarrow. I found this blog post (a basic comparison of speeds). and a github discussion that claims that files created with fastparquet do not support AWS-athena (btw is it still the case?) when/why would I use one over the other? what are the major advantages and disadvantages ? my specific use case is processing data with dask writing it to s3 and then reading/analyzing it with AWS-athena. Continue reading...