Install JRuby

It is recommended to benchmark Traject on JRuby for processing MARC input for performance. https://github.com/traject/traject.

1. To run JRuby you will need a JRE (the JVM runtime environment) version 7 or higher.

   $ java --version
      openjdk version "21.0.8" 2025-07-15
      OpenJDK Runtime Environment Homebrew (build 21.0.8)
      OpenJDK 64-Bit Server VM Homebrew (build 21.0.8, mixed mode, sharing)
   

2. Install Jruby

   $ rbenv install jruby-10.0.2.0
   $ rbenv local jruby-10.0.2.0
   

   Note: If the version you are looking for is not listed with rbenv install -l, try upgrading the ruby-build:

   $ brew update && brew upgrade ruby-build
   

   or

   $ cd ~/.rbenv/plugins/ruby-build && git pull && cd -
   

3. Install Bundler

   $ gem install bundler