[itssimon]

Valid concern that I tried to specifically address in how the SDKs are implemented! The middleware part is actually super lightweight. It only captures relevant metrics from the request and response and stores them in memory. Further processing and sending to Apitally happens asynchronously in the background, in regular intervals. That way the performance impact on request handling is very minimal.

Anecdotally, I noticed zero increase in CPU usage when I added the Apitally SDK to a FastAPI app that handles ~100 req/s. In comparison, adding OpenTelemetry was very noticeable, at least doubling the CPU usage.