Elgg: Graph memory usage loading a large number of entities

elgg_mem.php

<?php
 
require __DIR__ . '/engine/start.php';
 
global $ENTITY_CACHE;
_elgg_services()->db->disableQueryCache();
$md_cache = _elgg_services()->metadataCache;
 
$mem_initial = 0;
$show_mem_delta = function () use (&$mem_initial) {
	static $last;
	
	$mem = memory_get_usage();
	$total = ($mem - $mem_initial);
	$delta = (null === $last) ? 0 : ($total - $last);
	if ($delta > 0) {
	        $delta = "+$delta";
	}
	
	$width = round($total / 3000);
	
	echo "<div class='r' title='$delta (total: $total)' style='width:{$width}px'></div>";
	$last = $total;
	flush();
	ob_flush();
};
 
// get a bunch of GUIDs to load later
$guids = elgg_get_entities(array(
	//'type' => 'user',
	'order_by' => 'guid DESC',
	'limit' => 3000,
	'callback' => function ($row) { return $row->guid; },
));
 
// baseline mem usage
$ENTITY_CACHE = array();
$md_cache->flush();
$mem_initial = memory_get_usage();
 
?>
<style>.r{background:#080;height:2px}</style>
<?php
 
foreach ($guids as $i => $guid) {
	if ($i % 10 == 0) {
	        $show_mem_delta($i);
	}
	$entity = get_entity($guid);
}