Install Gem
bundle add shakapackerQuick Start
Install Files
bin/rails shakapacker:installDeploy
bin/rails assets:precompile
Shakapacker + Rspack
2-4x Faster Builds, Same Rails Workflow
Shakapacker ships with first-class Rspack support — a Rust-powered bundler that’s wire-compatible with Webpack 5 but dramatically faster. Switch bundlers with a one-line config change; no migration rewrite needed.
Drop-in Webpack replacement
Rspack is wire-compatible with Webpack 5. Existing loaders, plugins, and config files work without rewriting your build pipeline.
2-4x faster builds
Written in Rust, Rspack delivers dramatically faster cold starts, warm-cache rebuilds, and incremental production builds compared to Webpack.
Rails-native integration
Unlike Vite, Rspack works with Shakapacker out of the box — no ejecting from the Rails asset pipeline, no custom server configuration.
Academia.eduCase Study
2-4x build speed increase. Warm-cache startup went from ~1m to ~20s, and incremental prod builds now take ~10s.
2-4xfaster builds
~20swarm-cache startup
~10sincremental deploys
Jon Rajavuori — ShakaCode helped Academia.edu migrate from Webpack to Rspack
Why Teams Use It
Installation, configuration, and deployment guidance is sourced directly from the shakapacker/docs tree.
Keep webpack-style configuration and Rails conventions while switching the build engine to Rspack for major speed gains.
Docs Architecture
Canonical markdown stays in shakapacker/docs. This site syncs that content at build time, so docs stay co-located with the code while deployment remains independent.
Expert Help
Get direct guidance from the team behind Shakapacker
Planning a Webpack-to-Rspack migration or troubleshooting production builds? Book a complimentary 30-minute assessment with ShakaCode.