That code appears to be using reflection to build up runtime tables? https://github.com/qlova/tech/blob/c6379c9c32e5b7b2973bc02ba935765a4aefa514/sum/sum.go#L88

That code appears to be using reflection to build up runtime tables? https://github.com/qlova/tech/blob/c6379c9c32e5b7b2973bc02ba935765a4aefa514/sum/sum.go#L88 https://github.com/qlova/tech/blob/c6379c9c32e5b7b2973bc02ba... https://github.com/qlova/tech/blob/c6379c9c32e5b7b2973bc02ba935765a4aefa514/sum/sum.go#L177 https://github.com/qlova/tech/blob/c6379c9c32e5b7b2973bc02ba... That's a big difference from other languages where this is all handled at compile time.