So you've got a bunch of Perl worker processes and they need to share state. A work queue, a counter, a lookup table - the usual. What do you reach for?

Perl has solid options here, and they've been around for a while. File::Map gives you clean zero-copy access to mmap'd files - substr, index, even regexes run directly on mapped memory. LMDB_File wraps the Lightning Memory-Mapped Database -…