My Advent of Code 2020 solutions in the Rust programming language. This repository holds a separate Rust project for each day and part.

This year I attempt to develop a standalone, short, compact and fast solution for each problem (day part).

I've written an article about my solutions here: https://timvisee.com/blog/solving-aoc-2020-in-under-a-second/

Here is how long each solution takes to run to completion. All solutions are measured (non scientifically) with hyperfine on a i5-4670k @ 3.8Ghz machine running Linux. Timings include binary loading, execution, input and output timings.

Benchmark

Each Rust project contains a input.txt file, holding the puzzle input. Simply run the project to see the solution appear.

# One solution requires large stack size, set to allow unlimited size
ulimit -s unlimited
# Switch to day 1a, and run it
cd day01a
cargo run --release
# Or run everything in parallel
cd ../runner
cargo run --release --bin runner-par
# Or benchmark every day
cd ../runner
cargo run --release --bin bench

Some solutions might require Rust Nightly.

• 2024
• 2023
• 2022
• 2021
• 2020 (current)
• 2019
• 2018
• 2017

This project is released under the GNU GPL-3.0 license. Check out the LICENSE file for more information.