How can I speed up Ruby/Rake task

Question

rake --tasks takes about 18s to run. This is just the time it takes to load all the tasks, as a result any task I define will take at least this amount of time to run :

$time rake --tasks
rake db:clean           # Cleaning up database
rake passenger:restart  # Restart Application
rake spec               # Run specs

real    0m18.816s
user    0m7.306s
sys 0m5.665s

My Rakefile :

$: << "."
require "rubygems"
require "rspec/core/rake_task"

desc "Run those specs"
task :spec do
  RSpec::Core::RakeTask.new(:spec) do |t|
    t.rspec_opts = %w{--colour --format progress}
    t.pattern = 'spec/*_spec.rb'
  end
end

task :default  => :spec

Any idea why rake takes to much times ? Thanks

Answer 1

Try spring

Command line will look like:

spring rake -T

It will take more time running the first time, but subsequent runs will be very fast.

Answer 2

This solution worked for me: Faster rake tasks in Rails.

I had to do a little variation where I created a lib/tasks/no_rails directory and put all the Rake files which do not need Rails in there and loaded only those using the above method.