de> presents are simple, but <a href="https://en.wikipedia.org/wiki/Leaky_abstraction">leaky</a>. You
can’t make effective use of <code>future</code> without understanding
its various strategies for running R tasks asynchronously. Please read
this entire section carefully before proceeding.</p>
<div id="globals-providing-input-to-future-code-chunks" class="section level3">
<h3>Globals: Providing input to future code chunks</h3>
<p>Most future code chunks will need to reference data from the original
proce