Tips for performance when opening big projects like Keycloak?

[tsaarni]

I'm working with Keycloak, which is a big code base.

Opening the project is quite frustrating: it takes 5+ minutes for the things to settle down. It seems that just closing and reopening vscode with the project open will take very long as well, at least if there are any changed files (like after small git pull).

I wonder if too much of the code base is compiled since the compilation also shows errors for modules that are not shown when compiling with maven on command line (which takes 2 minutes btw). Maybe the active maven profile is not obeyed? Keycloak code base might have some maven modules that are not maintained anymore and it would be desirable to include only the relevant ones.

I would appreciate any pointers on how to troubleshoot and optimize the performance of opening a big project such as Keycloak.

Thank you!

Environment

• Operating System: Ubuntu 20.04.4 LTS
• JDK version: OpenJDK Temurin-11.0.15+10
• Visual Studio Code version: 1.68.1 (x86)
• Java extension version: redhat.java@1.8.0

Steps To Reproduce

1. git clone https://github.com/keycloak/keycloak
2. open the project

Current Result

Expected Result

Additional Informations

[snjeza]

@tsaarni the keycloak project includes 240 maven projects. You can try to include only required projects.
For instance, you can add the following property:

 "java.import.exclusions": [
        "**/node_modules/**",
        "**/.metadata/**",
        "**/archetype-resources/**",
        "**/META-INF/maven/**",
        "**/keycloak/**",
        "**/keycloak",
        "!**/keycloak/core",
        "!**/keycloak/common",
        "!**/keycloak/boms",
        "!**/keycloak/boms/**",
    ],

and Clean the workspace directory
It will include only the projects from the core, common and boms directories.

A related issue - #1084