AWS API Gateway Stage URL is faster than Custom Domain URL. How to improve Custom Domain URL response time?

Question

My API gateway is in us-west-2. There is a custom domain as well. I want to use the custom domain URLs. When I load tested /health endpoint from us-west-2, API gateway stage URL performed better than the custom domain URL. custom domain /health URL is around 2 times slower than the API gateway /health URL. What can I do to improve this? The custom domain name is "Edge Optimized".

Answer 1

APIG url's are Edge Optimized meaning they're spread out across AWS infrastructure.

You need to create an edge optimized custom domain as explained here - let me know if you need any additional guidance!