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Why Mux?

The Origin Story​

My goals of this language were primarily to learn. I wanted to understand how programming languages work under the hood, and to explore what a modern language could look like if I designed it from scratch.


From the beginning, I wanted to create a language that combined the best aspects of languages I use a lot, such as Python, Go, and Rust. Another motivation was to create a language that is easy to learn and read, while still providing strong safety guarantees and good performance for new programmers.


Mux (short for "MuxLang") was created to explore what a modern programming language could look like when combining the best aspects of existing languages while maintaining simplicity and clarity. In electrical engineering, a "mux" (multiplexer) is a device that selects one of many inputs and forwards it to a single output. Similarly, Mux the language aims to select the best features from various languages and combine them into a cohesive whole.

What Problems Does Mux Solve?​

1. The Python Ease-of-Use Problem​

Python is beloved for its readability and ease of use, but it lacks strong static typing and compile-time error checking.

Mux's Approach: Combine Python's clean syntax and ease of use with mandatory static typing and LLVM-powered native compilation.

2. The Rust-Inspired Safety Path​

Rust sets the bar for memory safety, using an innovative ownership model, while also providing an awesome type system.

Mux's Approach: Achieve memory safety through reference counting instead of compile-time borrow checking. This provides excellent safety with a gentler learning curve, letting you focus on your problem instead of fighting the type system.

3. The Go Design Space​

Go excels at simplicity, fast compilation, and building reliable network services.

Mux's Approach: Inspired by Go's minimalism but pushes further with modern language features like generics with monomorphization, pattern matching with guards, and result/optional types for expressive error handling.

Design Goals​

What Mux Aims For​

Readability First Code should be easy to read and understand. No semicolons, clear syntax, explicit types.

Everything Is Explicit No implicit type conversions. No hidden behavior. What you see is what you get.

Safety Without Complexity Memory safety through reference counting. No manual memory management, no borrow checker.

Beginner Friendly If you know Python or JavaScript, you should be able to read Mux code immediately.

Current Priorities​

Mux is focused on getting the fundamentals right first:

Core Language Features Solid foundations matter more than adding every possible feature. I'm building a complete, well-designed language, not rushing to add every bell and whistle.

Runtime Performance Reference counting provides excellent performance for most use cases while keeping the memory model simple and predictable.

Learning-Friendly Mux prioritizes being easy to learn and read over providing maximum control or performance at the expense of complexity.

Concurrency Thread-safe reference counting is in place. Higher-level concurrency features will be added after the core language stabilizes.

Honest Tradeoffs​

Every language makes tradeoffs. Here is what to expect:


Mux Gives You:

  • Worry-free memory management with reference counting
  • Simple, readable syntax
  • Strong compile-time guarantees
  • Native performance

Tradeoffs to Know:

  • Reference counting has overhead
  • Explicit type conversions
  • Early-stage ecosystem and Active development

Who Is Mux For?​

Mux is a great choice if:

  • You want Python's ease of use with compile-time type safety
  • You appreciate memory safety without a borrow checker
  • You want a modern language that is easy to teach and learn
  • You value readability and maintainability
  • You're building applications where developer productivity matters

Mux is growing toward:

  • Maximum performance
  • A rich ecosystem of libraries
  • Production-ready concurrency features
  • Long-term stability

Philosophy​

Mux follows these core principles:

  • Clarity over completeness : Better to have fewer, well-understood features than many half-baked ones.
  • Intentional design over feature accumulation - Every feature must justify its complexity by improving understanding or safety.
  • Documentation as a tool for thinking - Writing good docs reveals design flaws. If you can't explain it simply, it's probably not simple enough.

Coming from Other Languages?​

From Python​

You will love: The familiar syntax, ease of use, and clean code style
You will appreciate: Compile-time type checking catching bugs before they happen

From Go​

You will love: The simplicity and minimalism
You will enjoy: Pattern matching and generics (familiar if you used Go 1.18+)

From Rust​

You will love: No borrow checker, simpler lifetime management
You will appreciate: Reference counting with predictable performance

From JavaScript/TypeScript​

You will love: No more undefined surprises, result/optional instead of null
You will appreciate: A stricter type system that catches bugs at compile time

What's Next?​

Ready to try Mux? Head to the Quick Start guide to install and write your first program.

Want to understand the design decisions? Check out the Design Notes.

Current Status​

Mux is in active development. The language is growing and improving. This is an exciting time to get involved and help shape Mux's future.

If you're interested in following along or contributing, check out the GitHub repository.