constructor">ProgramStart</span></span></code><div class="def-doc"><span class="comment-delim">(*</span><p>get GC stats from the beginning of the program</p><span class="comment-delim">*)</span></div></li><li id="type-since.PreviousStats" class="def variant constructor anchored"><a href="#type-since.PreviousStats" class="anchor"></a><code><span>| </span><span><span class="constructor">PreviousStats</span> <span class="keyword">of</span> <a href="#type-t">t</a></span></code><div class="def-doc"><span class="