#49, tweaks

Author: miku

content/posts/meetup-49-wrapup.md

@@ -12,9 +12,10 @@ tags:
 Hybrid Meetup #49 took place
 [2025-03-25](https://www.meetup.com/leipzig-golang/events/305626247) 19:00 at
 [CHECK24](https://www.check24.de/) Leipzig Office and we had a great
-introduction to memory management with Go.
+introduction to memory management with Go by [Fabian](https://www.linkedin.com/in/fabian-g%C3%A4rtner-913584141/).
 
-Slides and quiz can be found at [mentimeter.com](https://www.mentimeter.com/app/presentation/alog8a9xsqj6hwbyi6t32m5qzh295rue/view?question=9bym8yfwp7c4).
+Slides and quiz can be found at
+[mentimeter.com](https://www.mentimeter.com/app/presentation/alog8a9xsqj6hwbyi6t32m5qzh295rue/view?question=9bym8yfwp7c4).
 
 [![](/images/meetup-49-menti-screenie-2025-03-25-231344.png)](https://www.mentimeter.com/app/presentation/alog8a9xsqj6hwbyi6t32m5qzh295rue/view?question=9bym8yfwp7c4)
 
@@ -31,7 +32,7 @@ There is a great GC guide at: [doc/gc-guide](https://go.dev/doc/gc-guide), and
 a few SO questions [tagged with Go and
 GC](https://stackoverflow.com/questions/tagged/go%2bgarbage-collection?tab=Votes)
 
-A tool for visualizing is structlayout.
+A tool for visualizing is [structlayout](https://pkg.go.dev/honnef.co/go/tools/cmd/structlayout).
 
 ```
 $ go install honnef.co/go/tools/cmd/structlayout@latest
@@ -49,6 +50,28 @@ $ structlayout -json net/http Response | structlayout-svg -t "net/http.Response"
 
 ![](/images/meetup-49-structlayout-combined.png)
 
+Some more memory related areas are:
+
+* [sync.Pool](https://pkg.go.dev/sync#Pool)
+* [memory arenas](https://github.com/golang/go/issues/51317) (experimental, but likely be declined)
+
+
+## VPN and *any of those problems*
+
+Run your own VPN mesh with [headscale](https://headscale.net) or
+[ionscale](https://github.com/jsiebens/ionscale) as the tailscale control
+server.
+
+Slides: [LGO49-RYOVPN.pdf](https://golangleipzig.space/downloads/LGO49-RYOVPN.pdf).
+
+[![](/images/meetup-49-RYOVPN.png)](https://golangleipzig.space/downloads/LGO49-RYOVPN.pdf)
+
+
+Where does the name tailscale come from? From the 2013 Google paper [The tail
+at scale](https://dl.acm.org/doi/pdf/10.1145/2408776.2408794).
+
+> The long tail of products are never going to be that big [ie. as a
+> hyperscaler] — almost everybody building almost everything doesn't have
+> any of those problems. -- [Avery Pennarun](https://apenwarr.ca/log/) at [45:56...](https://www.buzzsprout.com/1822302/episodes/9890092-tailscale-with-avery-pennarun-brad-fitzpatrick)
 
-### Misc