User blog comment:MisterWoodhouse/Social Activity, the 2010 Editor, and Unpausing Migrations/@comment-2.121.208.53-20201011171334/@comment-26939652-20201014170616


 * is not built for performance 

One of the more pressing reasons to fork MediaWiki several years ago, was in fact performance. The legacy platform therefore is built for performance and UCP is not, however hardware improvements and extra resources may have made this a moot point.

Since the code is not open source, we cannot judge this fact.