[Matthias247]

1) and 2) certainly apply. 3) and 4) don't. Testing in the largest region is one of the biggest anti-patterns.

[jedberg]

4 is still generally true. Most new features drop in us-east-1 on launch day.

[shepherdjerred]

Usually us-east-1 is deployed to after several smaller regions. Usually it'll fall in the middle of the week depending on the pipeline.

Just because a feature is there on launch day doesn't mean it was deployed to first. Features are often hidden behind flags that are switched for launch.

[jedberg]

I'm well aware of that, but the point is that when the feature is ungated to the public, it's in us-east-1 and gets all that load, and more load than the rest because of the fact that a lot of big customers are based in us-east-1, including much of Amazon itself.

[grumple]

AWS doesn't test there last I checked, they roll out to smaller regions first.