# tallystick
[](https://docs.rs/tallystick)
[](https://crates.io/crates/tallystick)
[](https://travis-ci.org/phayes/tallystick)
[](https://codecov.io/gh/phayes/tallystick)
[](https://patreon.com/phayes)
[](https://flattr.com/@phayes)
tallystick is a work-in-progress rust library for tallying votes.
_Current state is very unstable. It is not currently recommended for use. See checkboxes below for a list of features that are complete._
## Goals
1. **Ergonomic** - Easy to use.
2. **Fast** - Be the fastest general-purpose vote tallying library in the world.
3. **Secure** - Have no undefined behavior.
4. **Complete** - Support all well-known voting methods.
5. **Deterministic** - Running the same tally twice should never produce different results.
6. **Generic** - Generic over both candidate and count types.
## Features
- [ ] `wasm` support for use in the browser, or in blockchain smart contracts.
- [ ] `rational` support for perfectly-precise tallies by using rational fractions instead of floats.
- [ ] `fixed_point` support for decimal fixed-point tallies, required by some statutes.
- [ ] `ffi` support for calling from other programming languages.
- [ ] `alloc` support for embedded and other applications where there is an allocator, but no standard library.
## Supported Tally Methods
| ✓ | Plurality | | 120 million v/s | First Past the Post (FPTP) |
| ✓ | Score | | 3 million v/s | |
| ✓ | Approval | | 4 million v/s | |
| ⚠ | STV | Newland-Britton, Meek, Warren | 3 million v/s | Single Transferable Vote |
| | CPO-STV | | | |
| | Instant Runoff | | | |
| | Contingent | | | |
| ✓ | Condorcet | | 2 million v/s | |
| | Copeland | | | |
| ✓ | Schulze | Winning, Margin, Ratio | 2 million v/s | |
| | Schulze STV | | | |
| | Kemeny–Young | | | |
| | Minimax | | | |
| ✓ | Borda | Classic, Dowdall, Modified | 3 million v/s | |
| | Borda - Nanson | Classic, Dowdall, Modified | | |
| | Borda - Baldwin | Classic, Dowdall, Modified | | |
| | Dodgson | Quick, Tideman | | |
| | Ranked pairs | Margin, Winning | | |
| | STAR | | | |
| | Majority judgment | | | |
| | D'Hondt | Sainte-Laguë, Huntington-Hill, Quota | | |
1. ✓ means done, ⚠ means in-progress, blank means not started but support is planned.
2. Single threaded performance measured in votes tallied per second. Benchmarked on a 2017 Macbook Pro.
## Contributors
- Patrick Hayes ([linkedin](https://www.linkedin.com/in/patrickdhayes/)) ([github](https://github.com/phayes)) - Available for hire.
- Kurtis Jensen ([github](https://github.com/kbuilds))