Synchronous API with Shared HttpClient vs AsyncClient with Executor Service: Which mitigates latency under concurrent 3DS requests?
The goal is to determine whether employing a single shared HttpClient instance with the synchronous threedsmax API or leveraging the documented AsyncClient interface with an executor service results in lower latency spikes when issuing concurrent 3DS authentication requests. Constraints include the lack of an explicit thread‑safety guarantee for the shared H