Typechecker weights 2.1MB of data when importing it

According to one of my VSCode plugin, importing TypeChecker imports 2.1MB of data which seems pretty big for a package like this one considering that `expressjs` is 1.1MB


Any particular reason for that ?

Start by reproducing the TypeChecker import size with the VSCode plugin or an equivalent bundle inspection, then trace the TypeChecker import graph and package build output. The issue mentions no source files or tests, so first identify where the 2.1MB is introduced; done means explaining the size and recording whether a reduction or other change is needed.

Written by the indexing model from the issue text.