jorisvandenbossche opened a new pull request, #37854:
URL: https://github.com/apache/arrow/pull/37854

   ### Rationale for this change
   
   Enabling `pre_buffer` can give a significant speed-up on filesystems like 
S3, while it doesn't give noticeable slowdown on local filesystems, based on 
benchmarks in the issue. Therefore simply enabling it by default seems the best 
default.
   
   The option was already enabled by default in the 
`pyarrow.parquet.read_table` interface, this PR aligns the defaults when using 
`pyarrow.dataset` directly.


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