[20:50:29] <wikibugs>	 10serviceops, 10MediaWiki-Cache, 10MediaWiki-General, 10Performance-Team: Use monotonic clock instead of microtime() for perf measures in MW PHP - https://phabricator.wikimedia.org/T245464 (10awight) This is a slightly different question than the task addresses, but `microtime` can be surprisingly expensiv...