IntelliJ IDEA 2023.1 includes a host of improvements for the new UI, which has been overhauled based on the valuable feedback we’ve received from users. The range of changes includes the new Compact Mode, which provides a more consolidated look and feel of the IDE; an option to vertically split the tool window area just like in the old UI; a reworked Run widget; and more.

We’ve improved the IDE startup experience by performing the Scanning files to index process in smart mode. Doing so makes the IDE’s full functionality available much earlier in the startup process. When opening a project, IntelliJ IDEA 2023.1 uses existing caches from your previous session with the project and simultaneously looks for files to index. If no changes are found in the scan, the IDE will be ready, eliminating the delays that were previously caused by indexing on startup.

We’ve notably improved the IDE’s performance in importing Maven projects by optimizing dependency resolution as well as reworking the processes behind importing and configuring facets.

We’ve reworked the behavior of commit checks for Git and Mercurial to speed up the overall commit process. Checks are now performed in the background after you commit but before you push.

To simplify seeing applied security rules, IntelliJ IDEA Ultimate 2023.1 provides easy navigation to security matchers from Spring controllers. The navigation works both from security matchers to controllers and vice versa.