> Thus, they don't tend to mature more than the specific use case they get written for, provided they are still being maintained. This is all a bit abstract. T

> Thus, they don't tend to mature more than the specific use case they get written for, provided they are still being maintained. This is all a bit abstract. There are plenty of go libraries which are suitably mature for production use. For example Google's cloud libraries or Amazon's AWS libraries. There's a platform for communication of issues and releases: Github. I guess I haven't really had an issue with it... The only problem I've had is the messiness of versioning, but there's been solutions to that for a long time (godep, govendor, glock, etc...) > To the second point about per-thread caching, Go does not expose threads to end-users. So, there's no concept of thread-local. What you're describing results in lock striping, which has contention issues as described in the post. Sorry for the confusion. I did not mean thread-local variables. I meant breaking up your workload across mutiple goroutines so that you don't have to use shared state. For example suppose you receive a message with an org ID. You start 8 workers, all data for (id % 8 == 0) goes to worker 0, (id % 8 == 1) goes to worker 1, and so on. Each worker maintains a local map of data and no mutex is needed to coordinate access, because only one goroutine can use the data at a time. So there's no lock-striping and no contention issues. This is the recommended approach for Go concurrency: > Do not communicate by sharing memory; instead, share memory by communicating. I understand that this sort of approach doesn't work for every problem, there's not always an easy way to split up the data like this (you might end up with hotspots for example). But I feel like that conclusion needs to come after a bit of reflection, instead of reflexively reaching for a global object + mutex. (Not saying that's what you guys are doing... just a common issue I've seen working on distributed systems with developers new to Go)