# Hauptbuch

A plain-text double-entry accounting system written in Rust

Uses the same [journal format][journal-format] as [tackler][tackler].

## Goals

* Fast
* Simple
* Correct

## Performance

Hauptbuch is really fast and runs on low memory! Single file performance of
balancing 1E6 (one million) transactions is ~1.3 seconds (3 MB memory usage,
single core). [Benchmarks of Tackler][tackler-performance] on the other hand
report for the same dataset ~30 seconds and peak memory usage of around 6-7
GB!!! My own tests indicate that Hauptbuch is ~200 times faster (on
single-core) and ~700 times more memory efficient. With 16 GB of RAM, Tackler
failed to balance the 1E6 transactions.

[tackler]: https://gitlab.com/e257/accounting/tackler
[journal-format]: https://gitlab.com/e257/accounting/tackler/blob/master/docs/journal.adoc
[tackler-performance]: https://gitlab.com/e257/accounting/tackler/blob/master/docs/performance.adoc