Dear R-devel, A number of people have observed anecdotally that read.csv is slow for large number of columns, for example: https://stackoverflow.com/questions/7327851/read-csv-is-extremely-slow-in-reading-csv-files-with-large-numbers-of-columns I did a systematic comparison of read.csv with similar functions, and observed that read.csv is quadratic time (N^2) in the number of columns N, whereas the others are linear (N). Can read.csv be improved to use a linear time algorithm, so it can handle CSV files with larger numbers of columns? For more details including figures and session info, please see https://github.com/tdhock/atime/issues/8 Sincerely, Toby Dylan Hocking
[[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel