▲ 6 ▼ Go experience report for generics: google metrics api

This report describes my experience designing, implementing, and deploying a Go API for instrumenting programs with metrics for production monitoring. The C++ and Java APIs used templates and generics; since Go lacks those features, we developed an API that requires some runtime checks. Those runtime checks eventually caused failures in production, requiring us to replace them with logging and monitoring instead. Those failures could have been avoided altogether with support for generics in Go.