HOWTO : Optimize Ubuntu 16.04 LTS and Kali Linux 2016.2 with jemalloc

jemalloc is a general purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support. It is the best allocators for a broad range of demanding applications, and eliminating/mitigating weaknesses that have practical repercussions for real world applications.

Step 1 :

Option 1 : Compile from source (latest version)

*** This option is not recommended for Ubuntu 16.04 LTS Desktop and Kali Linux 2016.2. When using in Ubuntu 16.04 LTS Desktop, Firefox will be crashed when 2 or more instances are opened. Meanwhile, Kali Linux 2016.2 requires redis-server which is using stock version of libjemalloc1 by default. redis-server for Ubuntu 16.04 also requires stock version of libjemalloc1.

git clone https://github.com/jemalloc/jemalloc.git
cd jemalloc
./autogen.sh
make dist
make
sudo make install

The final files "libjemalloc.*" are located at "/usr/local/lib/".

touch /etc/ld.so.preload

echo "/usr/local/lib/libjemalloc.so" | sudo tee --append /etc/ld.so.preload

Option 2 : Install package (usually older version)

This option is recommended for Ubuntu 16.04 LTS and Kali Linux 2016.2.

sudo apt-get install libjemalloc1 libjemalloc-dev

The final files "libjemalloc.*" are located at "/usr/lib/x86_64-linux-gnu/".

touch /etc/ld.so.preload

echo "/usr/lib/x86_64-linux-gnu/libjemalloc.so" | sudo tee --append /etc/ld.so.preload

sudo ln -s /usr/lib/x86_64-linux-gnu/libjemalloc.so.1 /usr/lib/x86_64-linux-gnu/libjemalloc.so

Step 2 :

Reboot your box.

Step 3 :

To confirm it is running properly (for example, firefox is running with it) :

sudo lsof -E | grep libjemalloc | grep firefox

That's all! See you.