[crabbone]

We run an airgapped version of JIRA (but we are a very big company, globally distributed). Performance is in the gutter.

The annoying part is the amount of garbage fixes in JIRA's UI. For example, because of the loading speed, and me losing patience with it, if I don't wait for the page to finally finish loading and click on the "create" button, then instead of the modal dialog for issue creation, I get a whole new page for issue creation. Both options are atrocious from UX perspective (because usually I need to copy text from the issue I was reading into the issue I'm creating), but at least when it's a modal window, I can pop open the developer tools and delete the modal part that prevents me from copying the text from the issue otherwise blocked from interaction.

Also, it looks like due to speed, some queries simply don't finish on time, and randomly, searches don't find all the issues they should. Especially searches that ask for "s.t. parent issue has such-and-such properties".

Ultimately, JIRA isn't built to scale (ironically, since it's written in Java, which was always defended as being slow for small problems but scaled well). The code has a lot of assumptions about some operations being fast enough to not require buffering / incremental implementation. And sometimes you hit the combos of such unoptimized operations and have to wait minutes for the program to respond.