Intellij IDEA is popular IDE for programming language.
When you open existing maven or gradle or npm project in IntelliJ IDEA, It starts updating index at startup for couple of minutes and IDEA will not respond and unstable. Usually, If it is a new project, index takes longer time, nexttime onwards opening the project only updates index for the files that was added/deleted.
IntelliJ IDEA index issue forever
Sometimes, Indexing takes longer time and user unable to do any operation in IDEA.
The below steps are required to improve index update.
Go to File menu and choose Invalidate Cache or Restart option
IF the above steps does not solve the issue, follow next steps
imlfiles in project folder
Increase memory in IDEA
disable third party plugins
You can also exclude the folder in current project
Goto File -> Project Settings -> Modules -> Sources