span class='va'>ids</span><span class='op'>[</span>, <span class='fu'><a href='https://rdrr.io/r/base/list.html'>list</a></span><span class='op'>(</span>runtime <span class='op'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/sum.html'>sum</a></span><span class='op'>(</span><span class='va'>runtime</span><span class='op'>)</span><span class='op'>)</span>, by <span class='op'>=</span> <span class='va'>chunk</span><span class='op'>]</span><span class='op'>)</span>
</div><div class='output co'>#&gt; 