an-contextuals" class="section level2">
<h2 class="hasAnchor">
<a href="#why-are-my-custom-classes-slower-than-contextuals" class="anchor"></a>Why are my custom classes slower than contextual’s?</h2>
<p>Contextual makes ample use of the <code>data.table</code> package, which, if used the “data.table way”, can speed up in-memory data related operations substantially. For more infomation on <code>data.table</code>, see the <a href="https://cran.r-project.org/web/packages/data.table/vignettes/datatable-i