April 11, 2023

Integrating Rust into Elixir for Performance Optimization

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Integrating Rust into Elixir for Performance Optimization

Source: fly.io

Phoenix Framework Phoenix LiveView

The blog post by Jason Stiebs presents a guide on using Rust to enhance the performance of Elixir applications, specifically Phoenix LiveView apps. To handle CPU intensive tasks where native solutions are not available in Elixir's package manager hex.pm, the post suggests using high-quality Rust libraries. With rustler, a library designed to facilitate Rust integration, Elixir developers can easily call Rust code. Stiebs demonstrates how to set up rustler in a mix project, how to use Rust NIFs (Native Implemented Functions) with Elixir, and the process to deploy this configuration on Fly.io. He also discusses the importance of being a 'good BEAM citizen' by not blocking the Erlang VM while running intensive tasks and suggests using 'Dirty NIFs' to handle resource-heavy operations asynchronously. Overall, Stiebs illustrates the smooth workflow Rust can provide to an existing Elixir application, leveraging Rust's safe concurrency model and performance.

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