It's using a custom npm client we've built called Turbo. You can read more about the v1 version of Turbo here: https://medium.com/stackblitz-blog/introducing-tu

It's using a custom npm client we've built called Turbo. You can read more about the v1 version of Turbo here: https://medium.com/stackblitz-blog/introducing-turbo-5x-faster-than-yarn-npm-and-runs-natively-in-browser-cc2c39715403 https://medium.com/stackblitz-blog/introducing-turbo-5x-fast... We haven't released any more info on Turbo v2 yet but will soon.