Klaus Post @klauspost.com · 2hBack in the day Ultra Compressor II (DOS) trickled my interest in compression and data recovery as I was learning about computers. With the knowledge I have now, it was fascinating to look through it with an LLM and also quite nostalgic re-creating the UI I only vaguely remember. 100
Klaus Post @klauspost.com · 28/09/2026Working on a #golang compression benchmark comparison site. Deflate speed improvements from latest compression library release... (JSON stream) 270
Klaus Post @klauspost.com · 18/09/2026Why is #golang now a non-deterministic language with the 1.27 FMA changes? Pure Go code producing different output on different platforms. Avoiding that is why I *moved* to Go. 320
Klaus Post @klauspost.com · 09/09/2026My Ad Blocker.. is now showing ads. What a timeline to live in! 010
Klaus Post @klauspost.com · 28/08/2026I will be going to www.tasteremote.com/nomadvillage before going to @golab.io - looks fun - maybe someone wants to join?tasteremote.comCivita Remote: Digital Nomad Village In Italy, October 2026Civita Remote is Taste Remote's flagship digital nomad village in Civita Castellana, Italy. October, 2026. Coworking, community, and real Italian countryside living. 010
Reposted by Klaus PostGoLab Conference @golab.io · 22/07/2026🗜️ Compression is all about trade-offs. Smaller payloads, lower bandwidth, faster transfers... but at what cost in CPU, memory, and compatibility? At #GoLab2026, Klaus Post will guide you through the compression landscape in Go and help you choose the right tool for the job golab.io/talks/go-dat... 022
Klaus Post @klauspost.com · 17/07/2026Search Compressed Data for byte sequences with selective decompression using MinLZ v1.2.0 - available as cli and #golang API. Overhead is a fractional bit per byte, fully customizable and with fixed specification. 101
Klaus Post @klauspost.com · 09/07/2026Ported "Radsort — a stable LSD radix sort with O(√n) space overhead" by Robert Clausecker and Florian Schintke to #golang. Good, specialized sorting for big arrays of dense keys (uint64, etc). github.com/klauspost/ra...github.comGitHub - klauspost/radsortContribute to klauspost/radsort development by creating an account on GitHub. 140
Klaus Post @klauspost.com · 01/07/2026New #golang compression release. Big features include #zstd concurrent stream encoding, arm64 decompression assembly and various minor changes. 1200
Klaus Post @klauspost.com · 19/05/2026I must say the ability to test out ideas in less than an hour is so addictive. Also I feel much less "attached" to idea and it is much easier to abandon if it doesn't pan out. 140
Klaus Post @klauspost.com · 14/05/2026Very excited to be back at @golab.io - super chill and well organised event! I will give a talk on the state of #golang data compression. See you there! 061
Klaus Post @klauspost.com · 20/04/2026Still amazed me that sometimes you can just stumble across a change that gives 200% speed. 0120
Klaus Post @klauspost.com · 09/02/2026Proposal for stdlib #golang compress/zstd implementation: github.com/klauspost/st...github.comGitHub - klauspost/stdgozstd: Zstandard for Golang Stdlib (do not use) - https://github.com/golang/go/issues/62513Zstandard for Golang Stdlib (do not use) - https://github.com/golang/go/issues/62513 - klauspost/stdgozstd 040
Klaus Post @klauspost.com · 09/02/2026New 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... 1100
Klaus Post @klauspost.com · 24/01/2026Recommended neat, fast #golang xxh3 implementation: New release, now with arm64 NEON: github.com/zeebo/xxh3github.comGitHub - zeebo/xxh3: XXH3 algorithm in GoXXH3 algorithm in Go. Contribute to zeebo/xxh3 development by creating an account on GitHub. 1113
Klaus Post @klauspost.com · 16/01/2026Released #golang compression v1.18.3 containing upstream CVE-2025-61728 fix: github.com/klauspost/co...github.comRelease v1.18.3 · klauspost/compressDownstream CVE-2025-61728 See golang/go#77102 Full Changelog: v1.18.2...v1.18.3 030
Klaus Post @klauspost.com · 12/01/2026New #golang Reed-Solomon release. Contains new progressive field decoding and some significant speedups. Check it out: github.com/klauspost/re... 151
Klaus Post @klauspost.com · 01/12/2025Compression library for #golang v1.18.2 released. If you are running v1.18.1 (specifically) please upgrade. 021
Klaus Post @klauspost.com · 12/11/2025func ifElse[V any](cond bool, trueVal, falseVal V) V { if cond { return trueVal } return falseVal } At least it is more readable than ? : 010
Klaus Post @klauspost.com · 27/10/2025Now 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... 000
Klaus Post @klauspost.com · 23/10/2025Released v1.18.1 of the #golang compression library. You know what to do! Link as always github.com/klauspost/co... 191
Klaus Post @klauspost.com · 12/09/2025Vibe coding is no joke. With good guidance and review it is extremely powerful. 010
Reposted by Klaus PostFilippo Valsorda @filippo.abyssdomain.expert · 09/09/2025TIL 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... 2368
Klaus Post @klauspost.com · 28/08/2025Why does my custom domain handle switch to "⚠ Invalid Handle" every month or so? @support.bsky.team 000
Klaus Post @klauspost.com · 26/08/2025Whoever did #golang "modernize" - thank you! pkg.go.dev/golang.org/x...pkg.go.devmodernize package - golang.org/x/tools/gopls/internal/analysis/modernize - Go Packages 014
Klaus Post @klauspost.com · 11/08/2025Excellent blog post about hooking up Go into Java for erasure coding: kohlschuetter.github.io/blog/posts/2...kohlschuetter.github.ioFaster Reed-Solomon Erasure Coding in Java with Go & FFMBackblaze’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. 073
Klaus Post @klauspost.com · 22/07/2025Un-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. 060
Klaus Post @klauspost.com · 14/07/2025New #golang cpuid release. As always github.com/klauspost/cp... 010
Klaus Post @klauspost.com · 01/07/2025IMO #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. 041
Klaus Post @klauspost.com · 21/05/2025Finally a #golang SIMD proposal I can get behind in overall terms! <3 github.com/golang/go/is...github.comproposal: simd: architecture-specific SIMD intrinsics under a GOEXPERIMENT · Issue #73787 · golang/goProposal 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... 041
Klaus Post @klauspost.com · 17/05/2025Would a #golang MinLZ compressor level with a better "worst case" speed be useful? Overly dramatic example... 110
Klaus Post @klauspost.com · 15/05/2025Realizing I needed to add a mutex to protect an RNG call, I almost ended up with this.... Need more coffee 🫘 000
Klaus Post @klauspost.com · 22/04/2025Now @klauspost.com - wish that my old profile link would redirect to my new one, though. @bsky.app 000
Klaus Post @klauspost.com · 16/04/2025cmp.Or is so neat for error handling in #golang - just remember that *all* params are evaluated in order, and first error is returned. 180
Klaus Post @klauspost.com · 17/03/2025I with just released about 2 years of work on improving compression with a fixed encoding LZ77 style compressor for #golang Our goal was to improve compression by combining and tweaking the best aspects of LZ4 and Snappy. Check it out: github.com/minio/minlzgithub.comGitHub - minio/minlz: MinLZ is a LZ77 compressor, focused on realtime data compressionMinLZ is a LZ77 compressor, focused on realtime data compression - minio/minlz 33411
Klaus Post @klauspost.com · 19/02/2025New #golang compression package release. Mainly focused on non-assembly performance. Now uses "unsafe" - use "nounsafe" tag to disable. As always here: github.com/klauspost/co... 031
Klaus Post @klauspost.com · 12/02/2025Wait? The #golang github.com/golang/snappy has been archived? Any background on this? 000
Klaus Post @klauspost.com · 09/02/2025Helped a friend a bit to make a #golang concurrent version of the excellent age stream format by @filippo.abyssdomain.expert Check it out if it sounds interesting: github.com/bifrosta/age...github.comGitHub - bifrosta/age-concurrentContribute to bifrosta/age-concurrent development by creating an account on GitHub. 1133
Reposted by Klaus PostPeter Hellberg @c7.se · 05/02/2025The @fireflyzero.bsky.social ROM file format is a Zip archive compressed with Zstandard. For fun I wrote a small CLI in Go to extract these using the lovely compress module by @klauspost.bsky.social (Note that you could just as well use `firefly_cli import <file>`) gist.github.com/peterhellber...gist.github.comA quick and dirty decompressor for Firefly Zero carts (Which are Zip files compressed using ZSTD)A quick and dirty decompressor for Firefly Zero carts (Which are Zip files compressed using ZSTD) - unzipzstd.go 331
Klaus Post @klauspost.com · 09/01/2025Pretty fast, pretty random, endless, seekable #golang Reader: pkg.go.dev/github.com/m... (16KB internal block of random data, xor with 32B value based on offset ⊕ per instance value) Made for benchmarks, not crypto, it is trivially predictable. ~20GB/s with Go single core. ~60GB/s with amd64 asm.pkg.go.devrng package - github.com/minio/pkg/v3/rng - Go Packages 020
Klaus Post @klauspost.com · 02/01/2025doom-captcha.vercel.appdoom-captcha.vercel.appDOOM® CAPTCHAProve you're human by playing DOOM 000
Klaus Post @klauspost.com · 31/12/2024My album of 2024: Vows by MATTE BLVCK Simply an all-killer album, that just keeps developing. Styles vary between tracks, but solid all the way the way through, with a modern touch and even some instrumentals. Check it out if you are a bit into dark synth: matteblackus.bandcamp.com/album/vowsmatteblackus.bandcamp.comVows, by MATTE BLVCK9 track album 110