TypeScript Version: 3.6.1-rc

Search Terms:
tslib

Expected behavior:
#32742, which changes all tslib imports from namespace imports to named imports, would have decreased bundle size in webpack builds from typescript code

Actual behavior:
Due to a quirky workaround in webpack, all function invocations of named harmony imports are wrapped in an Object() constructor; as a result, #32742 actually increases bundle size (to the tune of ~9kB in Outlook Web boot bundles)

Since the PR was an attempt specifically to help webpack, and @sokra claims that tree-shaking works even with namespace imports, I think the change should be reverted.

Related Issues:
webpack/webpack#9615