devops-engineer video for in processing IoT data at scale through Pub/Sub, App Engine's standard environment, and a Go-written application, you've encountered
In processing IoT data at scale through Pub/Sub, App Engine's standard environment, and a Go-written application, you've encountered inconsistent performance degradation at peak loads in production, unreplicable locally. To continuously identify slow code paths with minimal performance impact and management overhead, what's the most suitable approach?