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 objects better than other allocators and generally gives better performance and memory usage to Ruby programs.
Installing jemalloc separately from Ruby is pain in some cases (e.g. Heroku, EngineYard, etc). gemalloc gem contains jemalloc itself within a gem, and enables instant jemalloc injection in a really easy way: install gemalloc gem, and launch your app with gemalloc command.
Install gemalloc gem in your application. For bundler based application, please add the following line into your Gemfile, and and install gemalloc by bundle install.
gem 'gemalloc'
Execute your application with gemalloc command, which is contained in je gem. Example command for Rails + bundler application is like follows.
$ bundle exec gemalloc rails server
-v option will let you confirm jemalloc is actually injected.
$ bundle exec gemalloc -v rails server
=> Injecting jemalloc...
=> Booting Puma
...