This is a simple PO file to ruby hash parser, which complies with GNU PO file specification. Tested with the msgcat (GNU gettext-tools) 0.18.3 tool.

The parser is probably as optimized for speed as possible with pure ruby, while parsing all different PO types into separate keys. It was written as a "core-replacement" for an equivalent parslet PEG parser for arashm/PoParser and benchmarked about 500 times faster.