Do you want to request a feature or report a bug?

I think it's a bug (not sure).

What is the current behavior?

Webpack includes in the resulting bundle nodejs shims for buffer, process and path modules when they are actually not necessary. It adds about 30kb in the minified bundle.
I faced this issue after updating version of webpack from 1.x to 2.x.

If the current behavior is a bug, please provide the steps to reproduce.

I made a small example, which illustrates the problem: https://github.com/sullenor/webpack-shims and attached the stats files:

• normal: https://rawgit.com/sullenor/webpack-shims/master/stats.html
• minified: https://rawgit.com/sullenor/webpack-shims/master/stats.min.html

What is the expected behavior?

Expected the resulting bundle to have a smaller size: ~3-5kb, not 33kb (minimized).

If this is a feature request, what is motivation or use case for changing the behavior?

No

Please mention other relevant information such as the browser version, Node.js version, webpack version and Operating System.

macOs Sierra 10.12.3, nodejs v7.7.2, webpack v2.2.1,
https://github.com/sullenor/webpack-shims/blob/master/package.json#L3-L6

From webpack/webpack#4473