jemalloc-rb

by kzk

gem install jemalloc && bundle exec je ./script/rails s

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jemalloc

Instant jemalloc injection into Ruby apps, for better performance and less memory.

Why jemalloc?

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.

Why jemalloc?

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 injection in a really easy way: install
je
gem, and launch your app with
je
command.

Install

Install

jemalloc
gem in your application. For bundler based application, please add the following line into your Gemfile, and and install
jemalloc
by
bundle install
.
gem 'jemalloc'

Usage

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

-v
option will let you confirm jemalloc is actually injected.
$ bundle exec je -v ./script/rails s
=> Injecting jemalloc...
=> Booting WEBrick
...

Limitation

Currently, this gem works only on Linux and Mac OS X.

License

BSD-derived License.

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