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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/05/06 22:48:14 UTC

[GitHub] [arrow] nealrichardson commented on pull request #9615: ARROW-3316: [R] Multi-threaded conversion from R data.frame to Arrow table / record batch

nealrichardson commented on pull request #9615:
URL: https://github.com/apache/arrow/pull/9615#issuecomment-833924620


   I'm a little skeptical, with the exception of the big change on the data.frames of factor columns, that this isn't just noise. I don't think there's been any other changes in the data.frame to Arrow code between latest master and where this branch is based. 
   
   For the sake of argument, let's assume that "a little better or a little worse" is really just no change. I'm more surprised that there seems only to be that one improvement. The fannie mae dataset has 31 columns: with 8 cores, why is essentially the same performance as before/with 1 core?


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