Show HN: Kival – A self-hosted knowledge system for organizations https://ift.tt/4S9CaLp

Show HN: Kival – A self-hosted knowledge system for organizations Hi HN, I’ve been building Kival, an open-source, self-hosted knowledge system for organizations. The idea is a collaborative knowledge space for teams and agents, where each contribution to the shared knowledge can meaningfully improve the output of their next tasks. It’s written in Rust, backed by PostgreSQL, and ships with a web app, CLI, and SDKs. Still early, so I’d really appreciate any feedback :) https://ift.tt/cLI36XS September 15, 2026 at 11:48PM

Show HN: TurboBench, the Compression Lie Detector, 100 Codecs, Daily Update https://ift.tt/SitgNPO

Show HN: TurboBench, the Compression Lie Detector, 100 Codecs, Daily Update TurboBench: The Ultimate Data Compression Benchmark 100+ Codecs. The Powerhouse in a Single Executable — The Compression Lie Detector Tired of misleading benchmarks with I/O overhead, cache effects, and CPU throttling? TurboBench delivers high-precision, zero-overhead results you can actually trust. Why TurboBench Stands Out The only benchmark that includes LzTurbo alongside 100+ popular, latest, and fastest compressors (LZ77, Rolz, BWT, Context Mixing, Entropy Coders, and more). - 100% in-memory testing — no disk I/O to skew your results. Supports multiple files, recursive directories, and smart concatenation of small files into multiblock tests. Built to avoid common pitfalls like cache scenarios and throttling found in other tools. - Unlock peak performance — TurboBench reduces throttling by intelligently controlling the CPU frequency - Automatic sorting, updating, and merging of result files. A nightly github release is created automatically whenever submodules change. - Creates a separate result file (file@SET.tbb) for each compressor set - TurboBench rank aggregation crowns the top compression libraries with — see who's king! https://ift.tt/kpKHWdT September 16, 2026 at 01:56AM

Show HN: Modern RSS reader with social capabilities based on AT Proto https://ift.tt/ZUTIntd

Show HN: Modern RSS reader with social capabilities based on AT Proto Hey HN! The web is a bit broken and looking at social medias like X makes me a bit depressed. I feel like the original content that we had before on a multitude of website has been replaced by ton of click-bait content that just want impressions and reactions. I would like us to go back to simpler times, where everyone had their publishing space (their website, or an hosted solution) and everyone could subscribe to it in their own software and do what they want with their feed. I still think that social is important, like sharing, because afterall it's what made social networks interesting in the first place, but it should happen outside of where the content is. That's why I wanted to build an RSS reader that is respectful of this principle of federation: no in-app reader, just RSS subscriptions. And I've added social capabilities based on the AT Protocol, like sharing / liking and following people. The project was coded with AI, but it's my convictions that I've put it in. It's self-hostable and I hope that more and more people will be convinced to publish on their own website instead of X / Bluesky. https://sunred.app/ September 16, 2026 at 12:42AM

Show HN: An e-ink frame that hears birds and draws them as 1800s illustrations https://ift.tt/6wBJxEV

Show HN: An e-ink frame that hears birds and draws them as 1800s illustrations https://ift.tt/FnoBrsZ September 15, 2026 at 02:31AM

Show HN: A Zoomable Equal-Area Map Projection that interpolates to Mercator https://ift.tt/caX26d1

Show HN: A Zoomable Equal-Area Map Projection that interpolates to Mercator https://ift.tt/njmZqW1 September 14, 2026 at 11:58PM

Show HN: Candle https://ift.tt/w8sd7J2

Show HN: Candle https://peterburk.github.io/candle.html September 14, 2026 at 01:04AM

Show HN: ChaosTree – A zero-dependency Java tree library (AVL,RBT,B-Tree,B+Tree) https://ift.tt/wxmfMI3

Show HN: ChaosTree – A zero-dependency Java tree library (AVL,RBT,B-Tree,B+Tree) What is ChaosTree? ChaosTree is a zero-dependency Java Sorted Set/Map library built around multiple tree implementations. It provides implementations of: - AVL Tree - Red-Black Tree - B-Tree - B+Tree I have not made my custom API as it implements NavigableSet, NavigableMap, SequencedSet and SequencedMap. My Custome API are: - buildFromSorted(Iterator> it, float factor) - importFlatMatrix(Object[][] blast, float factor) - Object[][] exportFlatMatrix() I started ChaosTree because I wanted to explore how far I could learn DS structure, It started as frst release of 7 tree of Set type with Custome API, As i got engrossed into it I moved to Map, During phase of switching from Set to Map there was drastic change and knowledge upgrade where I pushed my Tree limit from jdk11+ support to jdk21+ where paid close attention to dependency-free and memory layout, allocation,JVM behavior, and real-world performance. Some of the things I experimented with: - Different node layouts and metadata footprints - CRTP/F-bounded polymorphism for tree implementations - Parent-pointer vs parentless nodes - Array-based N-ary tree nodes - B-Tree/B+Tree degree selection - JMH benchmarking and JFR profiling - Differential/randomized testing against java.util.TreeMap/TreeSet After this rough and tough It also passes these test: -Guava Testlib compatibility testing -jqwik property-based testing -Randomized differential testing against reference collections -White-box structural validation of tree nodes -Direct validation of B-Tree/B+Tree structural invariants -Exception and iterator-contract testing -Serialization and cloning tests -Nary Tree uses custom jqwick test of API validation as well. Tail latency behavior is not shown here because it get's truncated into a simple text which made the dat read wrong: https://chaos-vy.github.io/ChaosTree/utils/JMH-Report.html I have also ran benchmark with official JDK TreeMapUpdate to my N-ary tree. GitHub: https://ift.tt/0HvUsGY https://chaos-vy.github.io/ChaosTree/ I'd especially like feedback on the API design, implementation choices, benchmark methodology. I am currently trying to truncate useless and complex branches for performnace tuning. https://ift.tt/0HvUsGY September 14, 2026 at 12:03AM