frum ☆
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Description:
Fast and modern Ruby version manager written in Rust
Type: Formula  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  formulae.brew.sh
Category: Developer tools
Tags: ruby version-manager rust development cli
Install: brew install frum
About:
Frum is a fast and lightweight Ruby version manager written in Rust. It provides a minimalistic command-line interface for installing, managing, and switching between multiple Ruby versions. Unlike older managers, Frum leverages Rust's performance for near-instantaneous version switching and relies on simple files for configuration.
Key Features:
  • Written in Rust for high performance and reliability
  • Zero-config and minimalistic design
  • Fast installation and switching of Ruby versions
  • Uses simple files for version management (no shell hooks)
Use Cases:
  • Managing multiple Ruby versions for different projects
  • CI/CD pipelines requiring fast Ruby setup
  • Developers seeking a lightweight alternative to RVM or rbenv
Alternatives:
  • rbenv – Frum is significantly faster and written in Rust, whereas rbenv uses shell shims
  • RVM – Frum is much lighter and avoids the complexity of gemsets and shell integration
Version History
Detected Version Rev Change Commit
Sep 13, 2025 5:57pm 0 VERSION_BUMP 656d1161
Sep 13, 2024 7:46am 0 VERSION_BUMP a54827b8
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