ConstCompressed data. Read on a pool thread — do not detach or resize its backing ArrayBuffer until the returned promise settles, or the read may see freed/truncated memory.
Expected decompressed size in bytes.
Optionaloffset: number
Start offset in input. Default 0.
Optionallength: number
Number of compressed bytes. Default rest of buffer.
Decompress on a pool thread (asynchronous, non-blocking).
uncompressedSizemust match exactly.