Configured the thread-loader to keeping workers alive in development mode

[sadkovoy]

#4346

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[gaearon]

Thanks! This does feel better.

The rebuild performance is still somewhat slower on next branch than on master. Would you like to look into why?

[sadkovoy]

Ok, I'll try to compare and debug. Could you close the related issue?

[viankakrisna]

cmiiw, but isn't this make more sense in app thread-loader instead of dependencies thread-loader?

create-react-app/packages/react-scripts/config/webpack.config.dev.js

Line 225 in 6a663b8

require.resolve('thread-loader'),

do we retranspile dependencies on every rebuild?

[iansu]

@viankakrisna That is an excellent point. Nice catch. I think this should either be used in both places or just for the app code. What do other people think?

[gaearon]

Should be used in both places I imagine.

[sadkovoy]

Oh, thank you! PR: #4582