2019.3.1 / Build #IU-193.5662.31: heap usage/waste

[mmoayyed]

Originally posted here: https://youtrack.jetbrains.com/issue/IDEA-229216

Background

• Running:

IntelliJ IDEA 2019.3.1 (Ultimate Edition)
Build #IU-193.5662.31, built on December 10, 2019
Runtime version: 11.0.5+10-b520.17 x86_64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
macOS 10.14.6
GC: ParNew, ConcurrentMarkSweep
Memory: 7987M
Cores: 8
Registry: bigger.font.in.project.view=true, debugger.watches.in.variables=false, ide.balloon.shadow.size=0
Non-Bundled Plugins: BashSupport, Builder Generator, CheckStyle-IDEA, FindBugs-IDEA, Git Scope, GradleDependenciesHelper, Hungry BackSpace, IDEA Restart, Lombook Plugin, MavenRunHelper, Statistic, WicketForge, com.alayouni.ansiHighlight, com.dubreuia, com.github.setial, com.mycila.intellij.plugin.gmavenplus, com.shankh.intellij.plugin.apache.eht, com.steve.plugins.autoscroll, in.1ton.idea.spring.assistant.plugin, izhangzhihao.rainbow.brackets

• Attempting to load this project: https://github.com/apereo/cas
• Using Gradle 6.0.1
• JDK 11.0.5
• MacOS Mojave, 16GB memory

What steps will reproduce the issue?

Once I attempt to Gradle-import the above project, the IDE basically gets stuck on the "Loading Project..." screen for 4-5 minutes. Once it's done, it's very sluggish, and the status bar shows it's using about 5GB of memory.

• I have removed, re-installed a brand new instances of the IDE to test the import again.
• I have removed all IDEA directories and tried to test the import again.
• I have disabled all extensions to run the import again.
• I have invalidated cached and restarted to test the import again.
• I have "turned it off and on" with multiple restarts to test the import again.

Nothing has made a difference. Attaching logs and snapshots for slow startup.

Based on profiling the IDE, it seems like a lot of activity from this plugin: Try disabling 3rd patty plugins. E.g. I see a lot of activity from the https://github.com/1tontech/intellij-spring-assistant plugin.