Hello World Sizes

📦 Compare the static binary size and memory usage of "Hello, World!" programs across various languages.

Note

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

Binary sizes

Memory usage

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📝 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.

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🧩 How to add a new language

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

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🎯 Goals

The goal of this project is to help me learn ❄️ Nix + Flakes by creating reproducible builds and comparing static binary sizes across languages.

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📊 Reports

View historical reports under ./.github/reports/