Go 1.25 includes a new experimental garbage collector called Green Tea, available by setting GOEXPERIMENT=greenteagc at build time. Many workloads spend around 10% less time in the garbage collector, but some workloads see a reduction of up to 40%!

It’s production-ready and already in use at Google, so we encourage you to try it out. We know some workloads don’t benefit as much, or even at all, so your feedback is crucial to helping us move forward. Based on the data we have now, we plan to make it the default in Go 1.26.

Go is released every six months. Each release cycle is broken down into a development phase lasting about 4 months, followed by a 3-month period of testing and polishing called the release freeze. If everything goes well, work on the next release begins before the previous release has shipped, resulting in an overlap of about a month.

TL;DR Meridian uses Go generics to encode timezones directly into the type system (et.Time, pt.Time, etc.), catching timezone bugs at compile time instead of production.