nateberkopec / heroku-buildpack-jemalloc

Heroku buildpack with jemalloc

heroku-buildpack-jemalloc

I am a Heroku buildpack that installs jemalloc into a dyno slug.

When used with heroku-buildpack-multi, I enable subsequent buildpacks / steps to link to this library. (You'll need to use the build-env branch of @mojodna's fork for the build environment (CPATH, LIBRARY_PATH, etc.) to be set correctly.)

Using

To use jemalloc with your app, either prefix commands with jemalloc.sh <cmd> or set LD_PRELOAD=/app/vendor/jemalloc/lib/libjemalloc.so.1 in your environment (it will then apply to all commands run).

Composed

You'll almost certainly want to use this in conjunction with one or more additional buildpack.

When creating a new Heroku app:

heroku apps:create -b https://github.com/ddollar/heroku-buildpack-multi.git

cat << EOF > .buildpacks
https://github.com/mojodna/heroku-buildpack-jemalloc.git
https://github.com/heroku/heroku-buildpack-nodejs.git
EOF

git push heroku master

When modifying an existing Heroku app:

heroku config:set BUILDPACK_URL=https://github.com/ddollar/heroku-buildpack-multi.git

cat << EOF > .buildpacks
https://github.com/mojodna/heroku-buildpack-jemalloc.git
https://github.com/heroku/heroku-buildpack-nodejs.git
EOF

git push heroku master

Building

This uses Docker to build against Heroku stack-image-like images.

make

Artifacts will be dropped in dist/. See Dockerfiles for build options.