VARNISH IS BUILT FOR SPEED, VARNISH BRINGS THE BEST IN WEB & MOBILE PERFORMANCE
Varnish is an HTTP accelerator designed for content-heavy dynamic web sites as well as heavily consumed APIs. Varnish already powers 2.5 million websites worldwide, and never stop scoping out ways to increase its speed and performance. Varnish is used by high-profile, high-traffic websites including Wikipedia, online newspaper sites such as The New York Times, The Guardian, The Hindu, Corriere della Sera, social media and content sites such as Facebook, Twitter, Vimeo, and Tumblr. In 2012, 5% of the top 10,000 sites in the web used the software.
Installing Varnish cache:
apt-get install apt-transport-https
curl http://repo.varnish-cache.org/debian/GPG-key.txt | sudo apt-key add –
deb http://repo.varnish-cache.org/ubuntu/ trusty varnish-4.0.3
apt-get install varnish