the resolver is very slow

[faassen]

When I use the included resolver, my (few) tests take more than 7 seconds, taking a while to start running. When I use the default resolver, the tests take little over 1 second. That's a massive difference and has a real impact on how easy it is to develop with tests.

The comment says:

uses a webpack style resolver, the default one has many issues.

It's using https://www.npmjs.com/package/enhanced-resolve-jest which in turn uses https://github.com/webpack/enhanced-resolve

I'd be interested in seeing what I'm paying for in some more detail. And maybe there's a way to configure this resolver to be faster? (I tried upgrading enhanced-resolver to 5.9.3, the latest release, but it made no difference)

[faassen]

It's also interesting to speculate why enhanced-resolver is so much slower. Is this because it does more work per module, or because it actually finds many more modules and needs to disregard them?