Github user JoshRosen commented on the issue:
https://github.com/apache/spark/pull/19077
Just curious: do you know where are we allocating these close-in-size
chunks of memory? I understand the motivation, but just curious to know what's
causing this pattern. I think the original idea here was that most allocations
would come from a small set of sizes (usually the page size, or a configurable
buffer size) and would not generally be arbitrary sized allocations.
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