Cache compiled npm packages.
Instead of caching the package tars as npm does, npm-stash caches the folder that npm installs for each dependency. This means it can be used to cache compiled versions of dependencies and greatly speed up installs.
npm install -g npm-stash
stash install mongodb // fetch and compile as usual from npm (the result is stored in ~/.npm-stash) stash install mongodb // grab and install compiled result from ~/.npm-stash