je - Instant jemalloc injection into Ruby apps
jemalloc sometimes dramatically supresses the memory fragmentation on server programs. je gem contains jemalloc itself within a gem, and enables you to inject jemalloc into your application in a really easy way: install je gem, and launch your app with je command.
Install je gem in your application. For bundler based application, please add the following line into your Gemfile, and and install je by bundle install.
gem 'je'
Execute your application with je command, which is contained in je gem. Example command for Rails + bundler application is like follows.
$ bundle exec je ./script/rails s
Currently, this gem works only on Linux. Not working on Windows and Mac OS X.