 df2 <span class="op">=</span> <span class="cn">NULL</span><span class="op">)</span></span></code></pre></div>
    </div>

    <div id="arguments">
    <h2>Arguments</h2>
    <dl><dt>df1</dt>
<dd><p>A data frame.</p></dd>


<dt>df2</dt>
<dd><p>An optional second data frame with which to comparing memory usage.
Defaults to <code>NULL</code>.</p></dd>

</dl></div>
    <div id="value">
    <h2>Value</h2>
    

<p>A tibble summarising and comparing the columnwise memory usage 
for one or a pair of data frames.<