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The ZSTD compression library by Facebook offers over 19 compression levels, but sometimes some seem to have more effect on overall compression efficiency and compression time than others.

What exactly is the difference between, for e.g., level 5 and level 6 in terms of the specific parameters being set?

For reference: https://facebook.github.io/zstd/zstd_manual.html

Wallace Long
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    It's open source, have a look at the implementation: https://github.com/facebook/zstd/blob/dev/lib/compress/clevels.h#L25 and https://github.com/facebook/zstd/blob/dev/lib/zstd.h#L1291 – Dan Mašek Aug 03 '23 at 21:10
  • that's exactly what I was looking for, thanks! – Wallace Long Aug 04 '23 at 18:05

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