Github user HyukjinKwon commented on the issue:
https://github.com/apache/spark/pull/19113
With 2.7G data, I ran a simple Java problem with 2.5.4 and 2.2.1 with
`CsvParser`, and simple e2e read tests. Elapsed time diff was roughly -1.7% ~
+1.2%. I think virtually no diff (or 0.5 improvement).
I think we generally trust other communities and libraries we decided to
add such as ORC, Parquet, Jackson and etc., and de-duplicate such efforts with
the community support. I think we discussed about this before.
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