mrocklin commented on issue #38389:
URL: https://github.com/apache/arrow/issues/38389#issuecomment-1777106272

   Cool.  What I'm reading from you are a couple of insights:
   
   1.  Arrow uses SNAPPY compression by default
   2. SNAPPY is performing around 200 MB/s on these machines
   
   I'll add my understanding, which is that I also expect SNAPPY to operate at 
GB/s speeds, but for some reason it's not here.  
   
   On Colab I also get 200MB/s as you do, but on my MacBook I get 767 MB/s
   
   This probably allows us to dive a bit deeper into the problem.


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