The following TypeScript snippet will import the whole lodash library:

import * as _ from 'lodash';

So far so good, but TIL that this is not tree-shakeable by webpack. This means you always get everything included in your bundle. This is not nice.

The solution is to always import your functions explicitly, e.g.:

import map from 'lodash/map';

My recommendation is to ban the 'lodash' altogether, if you’re using tslint.

You can find some benchmarks here.