bigint-benchmark-rs

Benchmarks for Rust big integer implementations.

Each benchmark is run 5 times, with the calculation repeated for at least 10 seconds each time. The fastest attempt is used as the result.

Libraries

| Library | Version | Notes | | -------------- | ------- | ------ | | rug | 1.13.0 | Links to libc and GMP | | rust-gmp | 0.5.0 | Links to libc and GMP | | ibig | 0.3.4 | Pure Rust, nostd | | num-bigint | 0.4.3 | Pure Rust, nostd | | ramp | 0.6.0 | Requires nightly Rust, uses x86_64 assembly |

Results

| Library | e 100k | e 1m | e 10m | fib 10m | fib 100m | fib_hex 100m | | -------------- | ----: | -----: | -------: | ------: | -------: | -----------: | | rug | 0.016 | 0.270 | 4.522 | 0.335 | 5.907 | 0.974 | | rust-gmp | 0.017 | 0.304 | 4.613 | 0.335 | 5.912 | 0.956 | | ibig | 0.033 | 0.975 | 30.838 | 1.192 | 40.566 | 8.676 | | num-bigint | 0.083 | 6.760 | 655.281 | 10.073 | 945.635 | 8.952 | | ramp | 0.135 | 12.567 | 1243.958 | 35.315 | 3555.541 | 16.671 |

Times in seconds.

Usage

Calculate 100 digits of e and compare answers: $ bigint-benchmark --task e --lib ibig --lib num-bigint --lib ramp --lib rug --lib rust-gmp -n 100 print answer = 2.718281828459045235360287471352662497757247093699959574966967627724076630353547594571382178525166427 ibig agrees num-bigint agrees ramp agrees rug agrees rust-gmp agrees

Calculate the 500-th Fibonacci number and compare answers: $ bigint-benchmark --task fib --lib ibig --lib num-bigint --lib ramp --lib rug --lib rust-gmp -n 500 print answer = 139423224561697880139724382870407283950070256587697307264108962948325571622863290691557658876222521294125 ibig agrees num-bigint agrees ramp agrees rug agrees rust-gmp agrees

Benchmark calculating a million digits of e: $ bigint-benchmark --task e --lib ibig --lib num-bigint --lib ramp --lib rug --lib rust-gmp -n 1000000 benchmark

Tasks

| Task | Description | Difficulty | Algorithm | Operations | | ---- | --------- | ---------- | --------- | ---------- | | e | n digits of e | Hard | Binary splitting | addition, multiplication, division, exponentiation, base conversion | | fib | n-th Fibonnaci number | Medium | Matrix exponentiation | addition, multiplication, base conversion | | fib_hex | n-th Fibonnaci number in hex | Easy | Matrix exponentiation | addition, multiplication |