WDS significant increase in recompile time after migrating from eslint-loader

[tpettrov]

After migrating from eslint-loader and updating eslint to v7 WDS recompile time increased abnormal.

• Operating System: Windows 10
• Node Version: v12.13.1
• NPM Version: 6.12.1
• webpack Version: 4.42.0
• eslint-webpack-plugin Version: 2.1.0
• webpack-dev-server: 3.1.14
• eslint : v.7.0.0

Expected Behavior

Recompile time stays normal.

Actual Behavior

Recompile time increased significantly from 1-3 seconds to around 10.

[alexander-akait]

Feel free to send a fix, I think we need clean something

[ricardogobbosouza]

Hi @tpettrov
Did you try to enable option lintDirtyModulesOnly?

[tpettrov]

Hi @ricardogobbosouza
Just checked it and yes recompile time is probably even faster. Many thanks.

[elisherer]

I also tried turning lintDirtyModulesOnly on but it failed detecting a change I made like creating an unused variable.

[CarlosAzocar]

Same, turning lintDirtyModulesOnly on but it failed detecting changes

[vegerot]

@ricardogobbosouza lintDirtyModulesOnly is a nice idea, but I would rather just have the linting be done asynchronously, as is done with the TypeScript checker (and as I describe in #33 (comment))

[ricardogobbosouza]

Hi @vegerot, @CarlosAzocar, @elisherer
Try v2.2.0

[vegerot]

@ricardogobbosouza thanks! Looks like the overhead should be must smaller now. As someone that's a little bit anal about compile times, I do still wish this could be done async (like TypeScript). But this should make it much more bearable