Install Ruby on Rails with Jemalloc on Linux Ubuntu

Install Ruby on Rails with Jemalloc on Linux Ubuntu

First of all we need to update & upgrade ubuntu packages :

sudo apt update && sudo apt upgrade

Then install its dependencies :

sudo apt install autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm5 libgdbm-dev libjemalloc-dev git -y

Next, clone rbenv repository from github :

git clone ~/.rbenv
git clone ~/.rbenv/plugins/ruby-build

And then add rbenvĀ  path to bashrc :

echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc
source ~/.bashrc

Now install ruby :

RUBY_CONFIGURE_OPTS=--with-jemalloc rbenv install 2.6.4

rbenv global 2.6.4

Verify if ruby was properly installed with :

ruby -v

Next verify if jemalloc was also properly installed :

ruby -r rbconfig -e "puts RbConfig::CONFIG['LIBS']"

-lpthread -ljemalloc -lgmp -ldl -lcrypt -lm # -ljemalloc should appear on the output

Configure gem default install without rdoc :

echo "gem: --no-document" > ~/.gemrc

Install bundler gem :

gem install bundler

Install rails gem :

gem install rails

rbenv rehash

Finally let’s generate new rails app :

rails new myapp

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