Eslint is slow when used with webpack

I am wondering if it is possible to boost up performance when using eslint-plugin-import with webpack.

In my project:

• I have 4500 modules (find node_modules/ -type f -name "package.json" | wc -l)
• I have 500 files that I am eslinting
• I use 8 aliases in webpack config resolve.alias
• I use 8 loader rules in webpack config module.rules.

Eslinting lasts ~30s, and I can see that import/no-unresolved takes most of the time:

Rule                              | Time (ms) | Relative
:---------------------------------|----------:|--------:
import/no-unresolved              |  4983.197 |    28.2%
react/prop-types                  |  1694.653 |     9.6%
react/sort-comp                   |  1321.233 |     7.5%
react/no-multi-comp               |  1264.966 |     7.2%
react/require-render-return       |  1221.941 |     6.9%
import/no-named-as-default        |   665.776 |     3.8%
react/no-deprecated               |   524.655 |     3.0%
indent                            |   261.081 |     1.5%
import/no-named-as-default-member |   248.505 |     1.4%
react/jsx-curly-spacing           |   198.665 |     1.1%

Any suggestions on improvement?

Use the reported profile as the starting point: import/no-unresolved is the main cost while resolving 4,500 packages across 500 files with webpack aliases and loader rules. Inspect the plugin's webpack resolution path and establish a reproducible benchmark; done means a measured improvement without changing resolution behavior.