For compressing small blocks, pass nil to the `out` parameter.

For compressing small blocks, pass nil to the `in` parameter.

Usa case: compress stream, large object only once This can be called concurrently Try ZstdCompressor for better efficiency if you need compress mutiple streams one by one.

Use case: compress small blocks This can be called concurrently.

Use case: decompress stream, large object only once This can be called concurrently Try ZstdDecompressor for better efficiency if you need decompress mutiple streams one by one.

Use case: decompress small blocks This can be called concurrently.