A Rails engine that provides a view helper that will speed your page loads. See the bottom of the README for the example use, that will probably make more sense than me explaining it here.

This is Alpha, naive, itch scratching bozo code.

Don't reinvent the wheel. Always reinvent the wheel.

Ponder this, good luck.

Add it to your gemfile:

gem "rails-async", :require => "async"

Add the following to your app/controllers/application\_controller.rb:

class ApplicationController < ActionController::Base
  helper :async
  after_filter do
    Thread.new { AsyncCache.instance.build }
  end

  # ...
end

That's it. If you don't want it available on every request, add it to the specific controllers where you intend to use it.

Slow page:

<h1>Accounts</h1>
<ul>
  <% sleep 3.8 %>
  <% @accounts.each do |account| %>
    <li>
      <%= render 'account', :account => account %>
    </li>
  <% end %>
</ul>

Fast page:

<h1>Accounts</h1>
<ul>
  <% asynchronously do %>
    <% sleep 3.8 %>
    <% @accounts.each do |account| %>
      <li>
        <%= render 'account', :account => account %>
      </li>
    <% end %>
  <% end %>
</ul>

Async worries about responding, you worry about why your code is so slow.

Speed: at what point is an approach like this worse than just rendering the whole page at once? Gotta measure to know if you're improved anything.

Practicality of testing: what's the mimimum viable test rig?

Praticality in general: who's gonna use it? When would this be more useful than manual ajax / async page splitting?