pspec
This gem depends on parallel_tests. Check it's page for installation instructions.
Gem pspec determines optimal processors count ( OPC ) as
processors count - 1
Install
Add to your Gemfile inside development group.
gem 'pspec'
Usage
rake pspec
Runs pspec:prepare and pspec:run consequentially.
rake pspec:full_prepare
Migrates your database, prepares your test database, clones your test database OPC times.
rake pspec:prepare
Clones your test database OPC times.
rake pspec:run
Runs your specs in parallel using OPC processors.