Repository: create-react-app
Issue: `react-scripts start` lags down system after some time
Labels: needs triage,issue: bug report

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### Describe the bug

Starting the dev server with a big project, with `react-scripts start` loads up everything fine, but as time passes, system horribly slows down. Turning off the server brings the system back to speed again, so cause of lag is isolated.

`DISABLE_ESLINT_PLUGIN=true` speeds things up initially, but does not help in the long run.

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1.22.10

### Which terms did you search for in User Guide?

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EsLint, lag

### Environment

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```
Environment Info:

  current version of create-react-app: 4.0.3
  running from /root/.npm/_npx/c67e74de0542c87c/node_modules/create-react-app

  System:
    OS: Linux 5.10 Kali GNU/Linux Rolling 2021.3
    CPU: (4) x64 Intel(R) Core(TM) i3-4005U CPU @ 1.70GHz
  Binaries:
    Node: 12.22.5 - /usr/bin/node
    Yarn: 1.22.10 - /usr/local/bin/yarn
    npm: 7.5.2 - /usr/bin/npm
  Browsers:
    Chrome: 91.0.4472.114
    Firefox: Not Found
  npmPackages:
    react: ^16.13.1 => 16.14.0 
    react-dom: ^16.13.1 => 16.14.0 
    react-scripts: ^4.0.3 => 4.0.3 
  npmGlobalPackages:
    create-react-app: Not Found
```

### Steps to reproduce

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(Write your steps here:)

1. Create a project with `create-react-app`
2. Start dev server with `yarn start`
3. Wait for some time
4. System starts lagging

### Expected behavior

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Performance over time should be consistent, and not slow down as time passes.

### Actual behavior

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System lags a lot, almost freezes, after 10 minutes of running the dev server, even with `DISABLE_ESLINT_PLUGIN=true`

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