fix: remove generating .eslintcache

[falinsky]

fixes #10161

No need to generate eslint cache due to performance boost
gained in eslint-webpack-plugin 2.4.1

Pull-request where eslint cache generation was enabled: #9911
Following discussion about performance boost: #9886
Version of eslint-webpack-plugin with recompiling performance improvements: https://github.com/webpack-contrib/eslint-webpack-plugin/releases/tag/v2.4.1

[ianschmitz]

I'm probably missing some context here, but what does disable the cache improve?

[falinsky]

I'm probably missing some context here, but what does disable the cache improve?

The cache was enabled in #9911 in order to improve recompilation time slowness.

It turned out that after enabling it - file .eslintcache started to be generated constantly in the root of the project. That fact annoys different people and provides some issues with errors persisting (see more in #10161).

However, eslint-webpack-plugin got updated to 2.4.1 where issues with slowness were fixed - so now enabling cache is not necessary at all (so it brings only issues without benefits, I guess).

[ianschmitz]

We are moving the file into node_modules in #9977, so #10161 should be taken care of. I'm sure the webpack guys would love to hear if caching is slowing the build down. I'm hesitant to disable without any data to back it up.

[edksam]

This fix doesn't work please. And this is slowing down development for us rookies and it's giving me and my team no joy. A lot of data in terms of frustrations going on web now. I really don't see the need for caching in development and as a noob..

[falinsky]

@ianschmitz reopening this pull-request due to an increasing amount of complaints regarding having eslint caching enabled (#10161)

[petesmc]

Cache enabled causes serving old data: #10301

[mcchong]

Cache enabled causes serving old data: #10301

Hey hope this makes the next release. I keep running into the above issue where .eslintcache gets stale and the dev server needs to be restarted. It's a bit of a killer.

[iansu]

This has been addressed in #10177. The cache directory has been moved into node_modules.