Instant jemalloc injection into Ruby apps, for better performance and less memory.
Ruby relies on malloc(3) for its internal memory allocation. Using better malloc() implementation will boost your application performance, and supress the memory usage.
jemalloc is a malloc(3) implementation, originally developed by Jason Evans. jemalloc handles small object better than other allocators so usually gives better performance and memory usage to Ruby programs.
Installing jemalloc separately from Ruby is pain in some cases (e.g. Heroku, EngineYard, etc). je
gem contains jemalloc itself within a gem, and enables instant jemalloc ingection 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 and Mac OS X.