Re: Parser for Debian's RFC822-based formats
The Debian library perhaps?
The ByteString versions are quite fast.. can load the sid in a second or two.
The Debian library is used by the autobuilder:
And which needs to read Release file, Source and Package files, resolves dependencies, create new debian/changelog entries, and more..
It is also used by the mirror library:
Which can do partial mirroring of debian repositories. (Meaning, it has to walk the Packages and Sources files and find only the relevant files to mirror).