https://github.com/rezigned/hello-world-sizes

📦 Comparing static binary sizes of "Hello, World!" programs across languages using ❄️ Nix + Flakes.
https://github.com/rezigned/hello-world-sizes

flakes hello-world nix static-binaries

Last synced: 12 months ago
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📦 Comparing static binary sizes of "Hello, World!" programs across languages using ❄️ Nix + Flakes.

• Host: GitHub
• URL: https://github.com/rezigned/hello-world-sizes
• Owner: rezigned
• License: mit
• Created: 2025-05-04T16:10:54.000Z (12 months ago)
• Default Branch: main
• Last Pushed: 2025-05-05T16:17:44.000Z (12 months ago)
• Last Synced: 2025-05-07T06:49:40.614Z (12 months ago)
• Topics: flakes, hello-world, nix, static-binaries
• Language: Nix
• Homepage:
• Size: 347 KB
• Stars: 1
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Hello World Sizes

📦 Compare the static binary size of a **"Hello, World!"** program across programming languages.

> [!NOTE]

> This project automatically builds and records binary sizes of "Hello, World!" implementations for various languages like C, C++, Rust, Go, Zig, Nim, V, and more — all **statically linked**!

![Latest size comparison](.github/reports/binary_size_latest.png)

![Latest size comparison](.github/reports/memory_usage_latest.png)

---

## 📝 Rules

To ensure fair and meaningful comparisons:

* ✅ Each "Hello, World!" program must be idiomatic in its language (e.g. no inline assembly, etc.).

* ✅ Output must be a simple "Hello, World!" to stdout.

* ✅ Only statically linked binaries are allowed.

* ✅ Standard toolchains only (no exotic or size-optimized forks).

* ✅ Compiler optimizations (e.g. -Os, -s) are allowed and noted.

---

## 🧩 How to add a new language

1. Copy the [src/_template](src/_template) directory and and rename it to match the language name (e.g. `src/go`, `src/rust`).

2. Update `src/{lang}/flake.nix` to build a statically linked `hello` binary in that language.

3. Add the new language to the `inputs` and `langs` list in the top-level [flake.nix](flake.nix).

4. Run `nix run` to build the new language and generate a report.

---

## 🎯 Goals

The goal of this project is to help me learn ❄️ [Nix](https://nixos.org/) + [Flakes](https://nixos.wiki/wiki/Flakes) by creating reproducible builds and comparing static binary sizes across languages.

---

## 📊 Reports

View historical reports under [`./.github/reports/`](./.github/reports/)