--- title: "The one with Go 1.20" publication: "Go Weekly" issue: 446 published_at: "2023-02-03" canonical_url: "https://golangweekly.com/issues/446" --- Plus entering the memory arena, a call for speakers, and improving the observability of Go services. | #​446 — February 3, 2023 [Unsub](https://golangweekly.com/leave/*|UID|*)|[Web Version](https://golangweekly.com/issues/446) Together with [![Tailscale logo\](https://res.cloudinary.com/cpress/image/upload/c_fill,g_auto,e_trim,w_280,h_100/e_make_transparent/co_white,e_outline:7/zyrdpx3vpbxxzkmbrkf7.png)](https://tailscale.com/?utm_source=golang&utm_medium=email&utm_campaign=2023-2-3&utm_content=brand) The _Go Weekly_ Newsletter [![\](https://res.cloudinary.com/cpress/image/upload/w_1280,e_sharpen:60,q_auto/zpyleomjrmcrnpcwn79u.jpg)](https://go.dev/blog/go1.20) [Go 1.20 Released](https://go.dev/blog/go1.20) — Hurrah – exactly six months after Go 1.19 comes the latest significant release of Go. Here’s some of what’s new: - [Profile-guided optimization (PGO)](https://go.dev/doc/pgo) is a new (in _preview_) feature using profile runs of your app to optimize its future compilation. - Direct slice to array conversion. - Perf improvements in the garbage collector. - Errors can now wrap multiple other errors. - A new `crypto/ecdh` package implementing Elliptic Curve Diffie-Hellman key exchanges. - 1.20 is the final release that will run on macOS 10.13/10.14 or Windows 7/8. - **And a lot more..** see [the Go 1.20 release notes](https://go.dev/doc/go1.20) for the full roundup. Robert Griesemer and the Go Team [![\](https://copm.s3.amazonaws.com/e1b27bd4.png)](https://tailscale.com/?utm_source=golang&utm_medium=email&utm_campaign=2023-2-3&utm_content=brand) [Securely Access Internal Resources With Tailscale](https://tailscale.com/?utm_source=golang&utm_medium=email&utm_campaign=2023-2-3&utm_content=brand) — Securely access resources in your tailnet without exposing them to the public internet, even if you’re on an untrusted network, mobile device, or just a web-browser. Tailscale sponsor [Memory Arenas vs Traditional Memory Management](https://pyroscope.io/blog/go-1-20-memory-arenas/) — “Memory arenas” are very much [an experimental concept](https://github.com/golang/go/issues/51317#issuecomment-1385623024) in Go right now and should not be relied upon, but being able to obtain a single preallocated slab of memory within which related objects can be stored has some advantages worth exploring. Dmitry Filimonov [What’s New in Go 1.20, Part III](https://blog.carlmjohnson.net/post/2023/golang-120-minor-features/) — The latest in a series of posts digging into the details of Go 1.20, this time focusing on **minor standard library changes**, briefly covering tweaks to `math/rand`, `path/filepath`, `httputil.ReverseProxy`, and the introduction of `strings.CutPrefix`. Carl M Johnson **IN BRIEF:** - A recent survey by JetBrains indicates developers are ['most likely to learn Go and Rust in 2023'](https://thenewstack.io/developers-most-likely-to-learn-go-and-rust-in-2023-survey-says/). - 📅 GopherCon UK 2023, which takes place this August, has [an open call for speakers](https://sessionize.com/gophercon-uk-2023). [Improving the Observability of Go-Powered Services](https://flow.com/engineering-blogs/golang-services-improving-observability) — Jumps straight into the practicalities of logging, metrics, tracing with TraceQL, and connecting profiling with tracing. Alexey Ivanov [Introducing The Linear Developer Experience](https://t.mp/3Dm8CdL) — Explore a new developer experience concept that turns complex and dreadful project work into a delightful and pleasant experience. Temporal Technologies sponsor ▶[How to Ace That CFP (Call For Papers)](https://changelog.com/gotime/265) — A “call for papers/proposals” is when an event invites folks to submit talk proposals. _Go Time_ brought on some conf organizers to talk about what they look for and how potential speakers can craft submissions. Go Time Podcast podcast [Profiling Go Code in the GoLand IDE](https://blog.jetbrains.com/go/2023/02/02/profiling-go-code-with-goland/) Hrittik Roy 🛠 Code & Tools [![\](https://res.cloudinary.com/cpress/image/upload/w_1280,e_sharpen:60,q_auto/xjdg6ijqj2eiggiuefoz.jpg)](https://github.com/mmcdole/gofeed) [gofeed 1.2: A Parser for RSS, Atom, and JSON Feeds](https://github.com/mmcdole/gofeed) — A mature, heavily relied upon on, and robust option for parsing RSS (in all common variants), Atom _and_ JSON feeds. v1.2 adds support for multiple link tags in RSS feeds. mmcdole [An Update on go-redis v9](https://uptrace.dev/blog/posts/go-redis-v9.html) — [go-redis](https://github.com/redis/go-redis) is a Redis client and now lives directly under the official Redis organization on GitHub. v9 adds support for the RESP3 protocol, OpenTelemetry-based performance monitoring, pipeline retries, and a new hooks API — it's a big update. Uptrace [Don’t Let Your Issue Tracker Be a Four-Letter Word. Use Shortcut](https://shortcut.com/?utm_source=cooperGO&utm_medium=spon_nl&utm_campaign=prospecting&utm_content=fourletter) — The best issue tracking software is one that software developers are actually happy to use. Shortcut (formerly Clubhouse.io) sponsor [Goldmark 1.5: Markdown Parser Library](https://github.com/yuin/goldmark) — Pure Go, easy to extend, and [CommonMark](https://commonmark.org/) compliant (handy for GitHub-Flavored Markdown). Yusuke Inuzuka [tbls: CI-Friendly Tool for Documenting Databases](https://github.com/k1LoW/tbls) — Auto document a database in Markdown format with schemas rendered via DOT, PlantUML, Mermaid, or images. By default you get docs covering columns, indexes, relations, and schema details ([sample](https://github.com/k1LoW/tbls/blob/main/sample/postgres/README.md)). Ken’ichiro Oyama Jobs [Site Reliability Engineer](https://jobs.ashbyhq.com/stickermule/2482befb-4aa7-4372-98d7-042aaf774315?utm_source=Cooperpress) — Join our "kick ass" team. Our software team operates from 17 countries and we're always looking for more exceptional engineers. Sticker Mule [Find a Job Through Hired](https://hired.com/join/?utm_source=newsletter&utm_medium=sponsor&utm_campaign=%28b2c%29%28l-all%29%28r-all%29%28cooper-golangweekly%29&utm_content=easy-job-hunting) — Hired makes job hunting easy-instead of chasing recruiters, companies approach you with salary details up front. Create a free profile now. Hired **QUICK RELEASES:** - [Ginkgo 2.8](https://github.com/onsi/ginkgo) ↳ Modern testing framework for Go. - [Grafana Tempo 2.0](https://grafana.com/oss/tempo/) ↳ Distributed tracing backend. - [FerretDB 0.9](https://github.com/FerretDB/FerretDB/releases/tag/v0.9.0) – MongoDB alternative. - [fq 0.3](https://github.com/wader/fq) – Like `jq` for binary formats. - [GoBGP 3.11](https://github.com/osrg/gobgp) – BGP implemented in Go. - [rpcx 1.8](https://github.com/smallnest/rpcx) – Microservices framework. 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