# Fast Coster A business costing system that is super fast: - Money movements in less than a second - Overhead allocation in ~2s for large datasets (~10000 departments) and not flushing every from record - up to 10s when flushing from/to allocations ## General Notes Setting the number of threads in overhead allocation: set RAYON_NUM_THREADS environment variable ([doc](https://github.com/rayon-rs/rayon/blob/master/FAQ.md)). Note multithreading is only currently used to calculate allocation percentages, it is not used in the main allocation processing.