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Bug: huge memory consumption #10516

@KostyaTretyak

Description

@KostyaTretyak

Before You File a Bug Report Please Confirm You Have Done The Following...

  • I have tried restarting my IDE and the issue persists.
  • I have updated to the latest version of the packages.
  • I have searched for related issues and found none that matched my issue.
  • I have read the FAQ and my problem is not listed.

Relevant Package

typescript-eslint

Playground Link

No response

Repro steps

I have an open-source monorepository containing approximately 650 files and 42,000 lines of code. This project uses TypeScript Project References and Lerna, with each package having its own tsconfig.json. The total external direct dependencies and devDependencies across all projects is around 30. Work on Ubuntu 22.04.

ESLint Config

// @ts-check

import eslint from '@eslint/js';
import tseslint from 'typescript-eslint';

export default tseslint.config(
  eslint.configs.recommended,
  ...tseslint.configs.recommended,
  {
    languageOptions: {
      parserOptions: {
        project: [
          './packages/*/tsconfig.json',
          './examples/*/tsconfig.json',
        ]
      },
    },
  },
  {
    rules: {
      semi: ['error', 'always'],
      quotes: ['error', 'single', { avoidEscape: true }],
      '@typescript-eslint/no-floating-promises': 'error',
      '@typescript-eslint/no-unused-expressions': 'warn',
      '@typescript-eslint/no-misused-promises': 0,
      '@typescript-eslint/no-empty-object-type': 0,
      '@typescript-eslint/no-non-null-assertion': 0,
      '@typescript-eslint/no-empty-function': 0,
      '@typescript-eslint/no-empty-interface': 0,
      '@typescript-eslint/explicit-function-return-type': 0,
      '@typescript-eslint/explicit-module-boundary-types': 0,
      '@typescript-eslint/no-explicit-any': 0,
      '@typescript-eslint/no-inferrable-types': 0,
      '@typescript-eslint/no-non-null-asserted-optional-chain': 0,
      '@typescript-eslint/no-unused-vars': 0,
      '@typescript-eslint/triple-slash-reference': 0,
      '@typescript-eslint/ban-types': 0,
      'no-async-promise-executor': 0,
      'no-prototype-builtins': 0,
    },
  },
  {
    ignores: [
      '**/dist*',
      '**/*.d.ts',
      'website/*',
      'node_modules/*',
      'eslint.config.mjs',
      '**/jest.config.ts',
    ],
  },
);

tsconfig

{
  "compilerOptions": {
    // ...
  }
}

Expected Result

The typescript-eslint plugin should not consume so much memory.

Actual Result

As soon as I activate the line ...tseslint.configs.recommended in my eslint.config.mjs, restart VS Code, and open a file, for example, examples/20-authjs/src/app/app.module.ts, memory usage growing to 3.2 GB in one of the processes.

I tried using EXPERIMENTAL_useProjectService: true in eslint.config.mjs, but it didn't help.

Additional Info

No response

Versions

package version
@typescript-eslint/eslint-plugin 8.18.1
@typescript-eslint/parser 8.18.1
@typescript-eslint/rule-tester -
@typescript-eslint/scope-manager 8.18.1
@typescript-eslint/typescript-estree 8.18.1
@typescript-eslint/type-utils 8.18.1
@typescript-eslint/utils 8.18.1
TypeScript 5.7.2
ESLint 9.17.0
node 22.12.0

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    fix: user errorissue was fixed by correcting the configuration / correcting the codelocked due to agePlease open a new issue if you'd like to say more. See https://typescript-eslint.io/contributing.performanceIssues regarding performance

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