Change Details

This seems likely caused by the ATS migration given that this has to do with how requests are made internally between Varnish frontends and Apache. From `reversed` flame graphs at <https://performance.wikimedia.org/arclamp/svgs/daily/>, ctrl-F searching for `handleGz`: * 2019-12-13 / load.php: 0.39% spent in `MediaWiki\OutputHandler::handleGzip` * 2019-12-15 / load.php: 0.55% spent in `MediaWiki\OutputHandler::handleGzip` * 2019-12-17 / load.php: 0.90% spent in `MediaWiki\OutputHandler::handleGzip` * 2019-12-18 / load.php: 1.73% spent in `MediaWiki\OutputHandler::handleGzip` * 2019-12-19 / load.php: **8.90%** spent in `MediaWiki\OutputHandler::handleGzip` * … * 2020-01-09 / load.php: **9.10%** spent in `MediaWiki\OutputHandler::handleGzip` {F31507951 height=200}