Posted on June 16, 2019 There's currently a nasty memory leak in haskell-ide-engine which leaks all the cached module information about from GHC. It seems to only occur on certain platforms, but on platforms unfortunate to be affected by it, a sizeable portion memory is leaked every time the user types or edits their document. For a small module of about 60 lines, this was 30-ishMB per edit. (Yike