Klaus Post
@klauspost.com
Making Go stuff go brrrrrrrrrrrrrrrrrrr
Proposal for stdlib #golang compress/zstd implementation: github.com/klauspost/st...
GitHub - klauspost/stdgozstd: Zstandard for Golang Stdlib (do not use) - https://github.com/golang/go/issues/62513
Zstandard for Golang Stdlib (do not use) - https://github.com/golang/go/issues/62513 - klauspost/stdgozstd
github.com
February 9, 2026 at 5:58 PM
Proposal for stdlib #golang compress/zstd implementation: github.com/klauspost/st...
New v1.18.4 release of #golang compression library adds zstd compression to gzhttp middleware. Also zstd can now have some options modified on reset. See more at: github.com/klauspost/co...
February 9, 2026 at 8:38 AM
New v1.18.4 release of #golang compression library adds zstd compression to gzhttp middleware. Also zstd can now have some options modified on reset. See more at: github.com/klauspost/co...
Recommended neat, fast #golang xxh3 implementation: New release, now with arm64 NEON: github.com/zeebo/xxh3
GitHub - zeebo/xxh3: XXH3 algorithm in Go
XXH3 algorithm in Go. Contribute to zeebo/xxh3 development by creating an account on GitHub.
github.com
January 24, 2026 at 4:48 PM
Recommended neat, fast #golang xxh3 implementation: New release, now with arm64 NEON: github.com/zeebo/xxh3
Released #golang compression v1.18.3 containing upstream CVE-2025-61728 fix:
github.com/klauspost/co...
github.com/klauspost/co...
Release v1.18.3 · klauspost/compress
Downstream CVE-2025-61728
See golang/go#77102
Full Changelog: v1.18.2...v1.18.3
github.com
January 16, 2026 at 9:18 AM
Released #golang compression v1.18.3 containing upstream CVE-2025-61728 fix:
github.com/klauspost/co...
github.com/klauspost/co...
New #golang Reed-Solomon release. Contains new progressive field decoding and some significant speedups. Check it out: github.com/klauspost/re...
January 12, 2026 at 2:32 PM
New #golang Reed-Solomon release. Contains new progressive field decoding and some significant speedups. Check it out: github.com/klauspost/re...
Vibe Coders will understand.
December 19, 2025 at 3:04 PM
Vibe Coders will understand.
func ifElse[V any](cond bool, trueVal, falseVal V) V {
if cond {
return trueVal
}
return falseVal
}
At least it is more readable than ? :
if cond {
return trueVal
}
return falseVal
}
At least it is more readable than ? :
November 12, 2025 at 2:54 PM
func ifElse[V any](cond bool, trueVal, falseVal V) V {
if cond {
return trueVal
}
return falseVal
}
At least it is more readable than ? :
if cond {
return trueVal
}
return falseVal
}
At least it is more readable than ? :
Now even more #golang msgp codegen in v1.5.0. Now with generics. Generates code 1000x faster than your LLM! :D
Give it a spin: github.com/tinylib/msgp...
Give it a spin: github.com/tinylib/msgp...
October 27, 2025 at 3:14 PM
Now even more #golang msgp codegen in v1.5.0. Now with generics. Generates code 1000x faster than your LLM! :D
Give it a spin: github.com/tinylib/msgp...
Give it a spin: github.com/tinylib/msgp...
Released v1.18.1 of the #golang compression library. You know what to do! Link as always github.com/klauspost/co...
October 23, 2025 at 4:32 PM
Released v1.18.1 of the #golang compression library. You know what to do! Link as always github.com/klauspost/co...
Vibe coding is no joke. With good guidance and review it is extremely powerful.
September 12, 2025 at 1:55 PM
Vibe coding is no joke. With good guidance and review it is extremely powerful.
Reposted by Klaus Post
TIL that you can compress .zip files with Zstandard (pkware.cachefly.net/webdocs/case... compression method 93), and that libzip and 7-Zip support that.
libzip.org/news/release...
github.com/ip7z/7zip/re...
libzip.org/news/release...
github.com/ip7z/7zip/re...
September 9, 2025 at 2:20 PM
TIL that you can compress .zip files with Zstandard (pkware.cachefly.net/webdocs/case... compression method 93), and that libzip and 7-Zip support that.
libzip.org/news/release...
github.com/ip7z/7zip/re...
libzip.org/news/release...
github.com/ip7z/7zip/re...
Why does my custom domain handle switch to "⚠ Invalid Handle" every month or so? @support.bsky.team
August 28, 2025 at 12:30 PM
Why does my custom domain handle switch to "⚠ Invalid Handle" every month or so? @support.bsky.team
modernize package - golang.org/x/tools/gopls/internal/analysis/modernize - Go Packages
pkg.go.dev
August 26, 2025 at 9:10 AM
Excellent blog post about hooking up Go into Java for erasure coding:
kohlschuetter.github.io/blog/posts/2...
kohlschuetter.github.io/blog/posts/2...
Faster Reed-Solomon Erasure Coding in Java with Go & FFM
Backblaze’s Java-based Reed-Solomon Erasure Coding library is great tech, but comparatively slow. Let’s add some optimized Go, and get a whopping speedup.
kohlschuetter.github.io
August 11, 2025 at 4:10 PM
Excellent blog post about hooking up Go into Java for erasure coding:
kohlschuetter.github.io/blog/posts/2...
kohlschuetter.github.io/blog/posts/2...
Un-archived github.com/klauspost/cr... repo after getting a bit more than 2x on IEEE CRC32 using AVX512. Will submit upstream to #golang, but if you want to test it out early check out the repo.
July 22, 2025 at 9:53 AM
Un-archived github.com/klauspost/cr... repo after getting a bit more than 2x on IEEE CRC32 using AVX512. Will submit upstream to #golang, but if you want to test it out early check out the repo.
New #golang cpuid release. As always github.com/klauspost/cp...
July 14, 2025 at 8:49 AM
New #golang cpuid release. As always github.com/klauspost/cp...
IMO #golang is missing a clean way to send exact typed (and wrapped) errors across the wire between 2 similar binaries.
GOB would be ok, but registration isn't really feasible in big applications.
GOB would be ok, but registration isn't really feasible in big applications.
July 1, 2025 at 10:03 AM
IMO #golang is missing a clean way to send exact typed (and wrapped) errors across the wire between 2 similar binaries.
GOB would be ok, but registration isn't really feasible in big applications.
GOB would be ok, but registration isn't really feasible in big applications.
Finally a #golang SIMD proposal I can get behind in overall terms! <3 github.com/golang/go/is...
proposal: simd: architecture-specific SIMD intrinsics under a GOEXPERIMENT · Issue #73787 · golang/go
Proposal Details SIMD is crucial for achieving high performance in many modern workloads. While Go currently allows access to SIMD via hand-written assembly, this approach has significant drawbacks...
github.com
May 21, 2025 at 2:53 PM
Finally a #golang SIMD proposal I can get behind in overall terms! <3 github.com/golang/go/is...
Realizing I needed to add a mutex to protect an RNG call, I almost ended up with this.... Need more coffee 🫘
May 15, 2025 at 2:37 PM
Realizing I needed to add a mutex to protect an RNG call, I almost ended up with this.... Need more coffee 🫘
Sent in in. Now I can only 🤞
May 2, 2025 at 1:32 PM
Sent in in. Now I can only 🤞
Now @klauspost.com - wish that my old profile link would redirect to my new one, though. @bsky.app
April 22, 2025 at 2:40 PM
Now @klauspost.com - wish that my old profile link would redirect to my new one, though. @bsky.app
![// serialize serializes p as json.
func (p *someThing) serialize() ([]byte, error) {
var dst bytes.Buffer
comp := minlz.NewWriter(&dst)
err := cmp.Or(json.NewEncoder(comp).Encode(p), comp.Close())
return dst.Bytes(), err
}](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:ufsgk5krmtsfuypumkrekofw/bafkreifwfno56lmosgetoz3yjwpydjokej45zu2lkgexddzpjix7s7q2ji@jpeg)