Closest regions to different AWS/GoogleCloud regions

I use some AWS and Google Cloud services alongside applications that I’m looking at migrating to Fly. Is there any documentation with recommendations for choosing Fly regions that have good peering relationships or lower latency to different AWS / GCP regions?

I use GitHub - sudhirj/aws-regions.go: Find the AWS region closest to your server, especially when deploying on systems like in my apps, could also build something similar in whichever language you’re using.

This info tends to be dynamic, so might be good to check it often.

That said, I have been thinking of building a latency matrix page somewhere. What kind of services do you currently use on the cloud providers? The usual DB / queues?

GCP Firestore, GCP DataStore, GCP PubSub, AWS S3. Everything is region specific.

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