Webstorm 2025 very slow with nx monorepo

Issue Summary: WebStorm has been experiencing significant performance issues for several months, specifically with autocomplete and "Go to Declaration" functionality. These features are consistently slow, often presenting a loading bar that requires manual cancellation. The rest of the IDE generally performs at an expected speed. A CPU snapshot has been captured to aid in diagnosis.

Environment:

• WebStorm Version: 2025.1.2
• Operating System: Windows 11
• System RAM: 32 GB
• WebStorm Allocated RAM: 4096 MiB

Project Details:

• Project Type: NX Monorepo
• Frameworks/Technologies: Angular (TypeScript, HTML, SCSS)
• Project Structure: Approximately 3 Angular applications and 33 libraries within the monorepo.
• Node.js Version: v23.11.0
• npm Version: 10.9.2
• Affected Files: All files are equally affected by the performance degradation.
• Relevant Tools/Configurations: Jest, ESLint, Prettier, Dockerfiles.
• Installed Plugins:
  • .env files
  • Angular component folding
  • GitHub Copilot
  • JetBrains AI Assistant
  • Nginx Configuration
  • Nx Console
  • Properties
  • Test Automation
  • XPathView + XSLT

Steps to Reproduce (Problem Description):

1. Open any file within the NX monorepo (e.g., a TypeScript component, service, or HTML template).
2. For Autocomplete: Start typing to trigger autocomplete suggestions (e.g., typing a variable name, or after a dot . on an object). Observe the significant delay before suggestions appear or the UI freezes/hangs.
3. For "Go to Declaration":
   • Hover over a variable, function call, or class instance and click to navigate to its declaration (Ctrl+Click or Cmd+Click).
   • Observe that a loading progress bar appears almost immediately. This bar typically loads indefinitely until manually cancelled by the user.

Expected Behavior:

• Autocomplete suggestions should appear almost instantly without noticeable delay or UI freezing.
• "Go to Declaration" should navigate to the declaration of the symbol immediately, without any loading progress bar.

Actual Behavior:

• Autocomplete is consistently slow; suggestions are delayed, making coding inefficient.
• "Go to Declaration" always triggers a loading bar that does not complete on its own and requires manual cancellation.

Troubleshooting Steps Already Taken:

• Frequent restarts of WebStorm.
• Installation of all available WebStorm updates.
• (CPU snapshot has been taken and will be attached.)
  • Upload id: 2025_06_13_PgsHZNgsc9xTpSfXt94kzn (file: WS-251.26094.131__13.06.2025_08.29.16.zip)