New us-west region added, and did each zone for all regions. It’ll be interesting to add Japan later this year. (#’s in ms)
Methodology is to spin up micro instances in each zone and ping the single instance in each zone from all other zones. A fairly short go binary makes this much easier, but it could be better. The ips of the spun up instances are hardcoded, have to ssh into each instance to run the binary, collate the responses, etc. This could all be automated through the apis.