Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. Because of Memcached is not well maintained (not compatible with PHP 7) and could be considered as end-of-life, Redis should be a good alternative for Memcached.
Redis is a single-threaded server. It is not designed to benefit from multiple CPU cores. People are supposed to launch several Redis instances to scale out on several cores if needed. It is not really fair to compare one single Redis instance to a multi-threaded data store. Redis can also be configured as a cluster.
There are several ways to install Git on a Mac. In fact, if you’ve installed XCode (or it’s Command Line Tools), Git may already be installed. To find out, open a terminal and enter git –version.
$ git --version
git version 2.7.0 (Apple Git-66)
Apple actually maintain and ship their own fork of Git, but it tends to lag behind mainstream Git by several major versions. You may want to install a newer version of Git using one of the methods below: