A benchmark for Rust big integer implementations.
The benchmark is: calculate 1 million digits of the number e, using the Binary Splitting method.
Current results (on an Intel i7 laptop, average of 3 runs):
| Library | Version | Time (s) | Notes | | -------------- | --------| ------ | -------- | | rug | 1.11.0 | 0.271 | Uses GMP | | rust-gmp | 0.5.0 | 0.278 | Uses GMP | | ibig | 0.2.0 | 1.014 | Pure rust | | ramp | 0.5.9 | 12.469 | Rust and inline assembly (requires nightly toolchain) | | num-bigint | 0.4.0 | 30.970 | Pure rust |