New php-excimer profiler

Originally posted on mastodon.technology.

Tim is working on a new profiler for PHP, since there are issues with xhprof/tideways that really aren't worth dealing with...and that we can do better in profiling. He's written up some details on https://phabricator.wikimedia.org/T205059, and there's some initial code in our Gerrit.

I've done the initial Debian packaging at https://salsa.debian.org/mediawiki-team/php-excimer - my goal will be to have it in NEW by the end of the month.

#MediaWiki #profiling #PHP