refineImports plugin causes excessive memory use

[mpickering]

The refineImports plugin calls TypeCheck on all transitively imported modules which violates the important memory invariant that we only store TypeCheck results for files of interest. I recommend disabling this plugin by default until it is fixed.

My experience on GHC is that disabling this plugin causes start-up memory usage to decrease from 3GB to 1GB.

[michaelpj]

Wow, yes, that's quite bad!

[pepeiborra]

I noticed this a while ago but failed to raise an issue, my bad. Ping @rayshih would you mind contributing a fix?