asdf vs mise

The original version manager vs the faster rewrite. Both manage Node, Python, Ruby, Go versions. One is written in Rust.

The Rewrite That Worked

asdf is written in bash. It works, but it's slow. Every shell startup, every cd into a project directory, asdf adds latency. Plugin management is clunky.

mise (formerly rtx) is a Rust rewrite that's compatible with asdf plugins but 10-100x faster. Same .tool-versions file, same plugin ecosystem, dramatically better performance.

Beyond Version Management

mise added features asdf never will: environment variables, task running, project-level settings. It's becoming a complete development environment manager, not just a version switcher.

You can define tasks in mise.toml, set per-project env vars, and have everything activate automatically when you enter a directory.

Migration

Migration from asdf to mise is trivial. mise reads .tool-versions natively. Install mise, uninstall asdf, everything works. Your team doesn't even need to know you switched.

Quick Comparison

Factor	asdf	mise
Speed	Slow (bash)	Fast (Rust)
Plugin Compatibility	Native	asdf-compatible
Shell Startup Impact	Noticeable	Negligible
Env Variables	No (use direnv)	Built-in
Task Runner	No	Built-in
Config Format	.tool-versions	.tool-versions + mise.toml
Community	Established	Growing fast

The Verdict

Use asdf if: You're already using asdf and don't want to change anything. It works fine.

Use mise if: You want faster shell startup, env var management, task running, or you're setting up a new machine.

Consider: If you only need Node versions, fnm is even simpler. Single-purpose tools can be better.

The Bottom Line

mise wins

mise is asdf but faster, with better UX, and it reads your existing .tool-versions file. It's a drop-in replacement that's better in every measurable way. No reason to stay on asdf.

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