V — Fast Compiled Language for Maintainable Software

Introduction

V is a statically typed compiled language that aims to combine the best aspects of Go and Rust while keeping syntax simple. It compiles to human-readable C and supports hot code reloading, making it suitable for systems programming and rapid prototyping alike.

What V Does

• Compiles to native binaries via C backend with sub-second build times
• Provides memory safety without a garbage collector through ownership semantics
• Offers built-in concurrency with coroutines and channels
• Includes a cross-platform UI library and a built-in ORM
• Supports C and JavaScript interop for gradual adoption

Architecture Overview

V's compiler is written in V itself (self-hosted). Source code is parsed into an AST, type-checked, then lowered to C code which is compiled by a system C compiler (gcc, clang, or tcc for fast debug builds). The language runtime is minimal — no GC by default, with optional autofree and manual memory modes. A separate JavaScript backend enables browser targets.

Self-Hosting & Configuration

• Build from source with git clone and make; no external dependencies required
• Use v.mod for project metadata and dependency declarations
• Install third-party modules via v install author.module from VPM
• Configure memory management mode: autofree, GC, or manual per project
• Cross-compile to Windows, Linux, macOS, and FreeBSD from any platform

Key Features

• Sub-second compilation for projects of any size
• No null, no undefined behavior, no global state by default
• Built-in testing framework with v test
• Hot code reloading for live development without restarts
• Minimal runtime with no libc dependency option for embedded use

Comparison with Similar Tools

• Go — Go has a GC and larger runtime; V aims for simpler syntax and zero-dependency binaries
• Rust — Rust provides stricter memory guarantees but with steeper learning curve and longer compile times
• Zig — Zig focuses on replacing C with low-level control; V targets higher-level ergonomics
• Nim — Nim compiles via C too but uses GC by default; V emphasizes no-GC as the primary mode
• D — D offers more features but carries a heavier runtime and ecosystem complexity

FAQ

Q: Does V really compile as fast as claimed? A: V uses a lightweight parser and emits C code, then compiles with tcc in debug mode, achieving sub-second builds for most projects.

Q: Is V production-ready? A: V is under active development. Some features are stable, but the language spec and standard library continue to evolve.

Q: Can I use C libraries from V? A: Yes. V supports direct C interop with #include and C.function_name() syntax for calling C code without wrappers.

Q: How does V handle memory without a GC? A: V uses an autofree system that inserts deallocation calls at compile time, supplemented by optional manual and GC modes.

Sources

• https://github.com/vlang/v
• https://vlang.io/docs