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Diffstat (limited to 'Doc/library/compression.zstd.rst')
| -rw-r--r-- | Doc/library/compression.zstd.rst | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/Doc/library/compression.zstd.rst b/Doc/library/compression.zstd.rst index 57ad8e3377f..a901403621b 100644 --- a/Doc/library/compression.zstd.rst +++ b/Doc/library/compression.zstd.rst @@ -523,8 +523,14 @@ Advanced parameter control .. attribute:: compression_level A high-level means of setting other compression parameters that affect - the speed and ratio of compressing data. Setting the level to zero uses - :attr:`COMPRESSION_LEVEL_DEFAULT`. + the speed and ratio of compressing data. + + Regular compression levels are greater than ``0``. Values greater than + ``20`` are considered "ultra" compression and require more memory than + other levels. Negative values can be used to trade off faster compression + for worse compression ratios. + + Setting the level to zero uses :attr:`COMPRESSION_LEVEL_DEFAULT`. .. attribute:: window_log |