Node is capable of significantly better performance than the average Jira instance.

The bar is low.

My bad. We focused on the performance on the front end currently, as said before we loaded all the data locally and kept the data synced in the background to make the interactions fast. We chose nodejs as that was easy for us to get started with. But definitely, if things get hampered we will start looking into it.

Good call. Front-end performance is often the bottleneck. Preloading most of the required data in advance is really helpful. Trello does just that and it is one of the snappiest web apps.

That is entirely orthagonal to the issue. NodeJS can be Fast.