Concurrently like all repos at once with goroutines

[JacobGo]

I found that I can improve performance on potentially huge projects by liking all repos at the same time instead of sequentially. Used a separate goroutine for each repo, synced by a WaitGroup.

Some additional thoughts:

• Consider replacing each call to client.Activity.IsStarred() with a single initial call to client.Activity.ListStarred().
• Not sure how GitHub API might behave with hundreds of simultaneous requests.

I am quite new to Go and this is my first open source contribution in the language so please let me know if I missed something. Thanks!

[psampaz]

Hi @JacobGo, sorry for my late reply and thank you for this PR.

I do not know if I like the idea of sending requests concurrently, since according to Github recommendations:

Make requests for a single user or client ID serially. Do not make requests for a single user or client ID concurrently.

Source https://docs.github.com/en/rest/guides/best-practices-for-integrators#dealing-with-abuse-rate-limits

If you can reference an official Github source with concurrency limits, I might consider moving with this forward.

But, since you recently started with Go, my feedback for the PR is that is it fine. The only thing that I would add is some limit in concurrency using the idea described here http://jmoiron.net/blog/limiting-concurrency-in-go/.

thank you