August 2025 Go Meetup

calendar Aug 20, 2025 · 2 min read · go discussion  ·
Share on: linkedin copy

Meetup #77 on August 20 in person at Edmonton Unlimited at 6:00 pm.

Please RSVP at Meetup

News

Agenda

Go 1.25 Release

Peter Preeper reviewed Go 1.25, released August 12, 2025, which delivered a broad set of improvements without breaking the Go 1 compatibility promise. On Linux, GOMAXPROCS now adapts to cgroup CPU limits (useful in Kubernetes), and the experimental "green tea" GC (GOEXPERIMENT=greenteagc) targets 10–40% lower GC overhead for small objects. Other runtime wins include a continuous trace flight recorder, a long-standing nil-check fix, DWARF5 debug info by default, and faster slice allocation. Testing gained testing/synctest for deterministic concurrency tests, structured logging via t.Attr, and safer parallel benchmarks, while sync.WaitGroup.Go eased goroutine launches. Rounding it out: experimental JSON v2, go doc -http, TLS 1.2 SHA-1 signatures disabled by default, faster RSA keygen and FIPS mode, net/http's new CrossOriginProtection, and Windows async I/O.

Key points:

  • GOMAXPROCS now respects cgroup CPU limits on Linux (great for Kubernetes).
  • Experimental greenteagc cuts GC overhead by roughly 10–40%.
  • A continuous trace flight recorder helps debug rare production issues.
  • testing/synctest makes concurrency tests deterministic; sync.WaitGroup.Go simplifies goroutines.
  • Experimental JSON v2 is available via GOEXPERIMENT=jsonv2.
  • DWARF5 debug info by default and faster slice allocation speed builds.
  • Crypto/TLS hardening, faster RSA keygen, and net/http CrossOriginProtection.

presentation

Benchmarking Basics

Some beginning benchmarking basics.

Future Topics Discussion

Open discussion on topic for future talks, workshops, activities.

Events

  • Edmonton Go Meetup September