What’s fixed in IntelliJ IDEA 2026.3
The JetBrains Blog · 软件开发
Welcome to an overview of the most important fixes and usability improvements in IntelliJ IDEA 2026.3. IntelliJ IDEA 2026.3 ships over 1,000 bug fixes and over 300 performance fixes . We focused on performance, Java and Kotlin code intelligence, and the core workflows that matter for both classic and agentic development. User reports and data shared through automatic submission drive most of this work. Below is a recap of the most impactful updates. Performance Freezes, CPU usage, and memory were the focus of this release. Many of these fixes came from freeze reports and profiling of real projects, and others came from your tickets. Fewer UI freezes We removed UI freezes in the places where they were reported most often. Among others, Spring Boot inlay hints , property highlighting , and JPA entity analysis no longer stall the editor. Tomcat, WildFly, and JBoss no longer read configuration files on the UI thread . The same goes for the debugger’s variable building , the Git Commit and Changes trees , Optimize Imports , and Java SDK setup. Indexing, memory, and CPU Indexing is lighter on large projects. We removed excessive index updates when a second project closes during indexing and made the workspace model copy files lazily . Launching the IDE no longer starts WSL when you do not need it. The IDE also uses less memory. A code lens preview no longer keeps HiDPI images alive on the heap , and the JPA model no longer creates a new cache key on every lookup . Several leaks that kept closed projects in memory are fixed. Project import Importing large Maven and Gradle projects got optimization fixes. A deadlock during import on a remote development host is gone. A five-minute import of the Kotlin repository with Gradle 9.7 no longer spends most of its time processing errors after Gradle has finished. Automatic error and freeze reporting To find the problems that interrupt your work and fix them in order of impact, IntelliJ IDEA 2026.3 sends error and UI freeze reports