Performance testing becomes more informative when you know whether a slow response is caused by the application itself or by the distance between the user and the infrastructure. I decided to buy ipv6 proxy https://spaceproxy.net/en/proxy-ipv6/ and run comparable requests from several locations while monitoring response times. This helped me identify patterns that were not visible when I tested everything from the same network. I could then compare those results with server logs, CDN information, and application metrics to understand where the delays were coming from. The additional regional perspective gave me much better data for deciding what actually needed optimization.