pub fn header_uncompressed_size(data: &[u8]) -> Option<u64>Expand description
Peek at the recorded uncompressed size in a header-prefixed blob,
without decompressing the payload. Returns None for short or
unprefixed inputs (the caller can then fall back to the file length).
Used by header-only size queries (e.g. [ObjectStore::blob_size])
where reading the full blob would dominate. Only the first 9 bytes
of the input are consulted.