[Question] How does this compare to `npm i -g pnpm`? about action-setup

[zkochan]

There is currently no difference but I think we will update this action to install the pnpm binaries instead. So it will be different #18

Also, from pnpm v7, pnpm will not install global packages to the same directory to which npm installs them (pnpm/pnpm#4280). So if you will do just npm i -g pnpm@7, then pnpm i -g eslint will not work.

[kidonng]

Using this action adds ~3s to "Set up job" and itself needs ~2s to run, while npm i -g pnpm finishes in <1s. So, you may want to choose the latter if you want to save some seconds¹.

I doubt there's any need to do pnpm i -g in the CI.

Footnotes

1. this measurement may not be accurate ↩