Cloudflare's Quicksilver service pushes configuration changes globally within 30 seconds.
About Cloudflare Quicksilver
When a customer makes configuration changes in Cloudflare, Quicksilver ensures that those changes reflect within 30 seconds across all data centers that comprise Cloudflare's vast global network. This applies to configuration changes to all of Cloudflare's products and features.
Changes committed via the Cloudflare API and dashboard, as well as via Terraform, all utilize the same API and underlying technology.