Hacker News: KAdot

New comment by KAdot in "GPT-6 Astra in code review: Gains, privacy, and cost"

KAdot — Sat, 05 Sep 2026 12:40:27 +0000

I heavily A/B tested Opus vs Sol for two weeks, giving Claude Code and Codex the same tasks and comparing the results. In my experience Sol is much closer to Opus than to Fable, with Opus often beating Sol. The only area where Sol is better is code reviews, which these benchmarks confirm. I wish they included Fable.

New comment by KAdot in "TurboKV: Insanely fast Rust key-value store"

KAdot — Sat, 29 Aug 2026 13:47:03 +0000

The benchmark is setup to test 80 MiB dataset on a machine with 32 GiB RAM, which doesn't represent a typical database workload. How does the key-value store perform on larger than RAM datasets? MMAP is fast when the dataset fits in memory, but it can slow to a crawl when it doesn't, especially if the workload is mostly random point lookups.

How MVCC and Transactions Work in RocksDB

KAdot — Thu, 23 Jul 2026 13:21:45 +0000

Article URL: https://artem.krylysov.com/blog/2026/07/23/how-mvcc-and-transactions-work-in-rocksdb/

Comments URL: https://news.ycombinator.com/item?id=49021163

Points: 4

# Comments: 0

New comment by KAdot in "Claude Opus 4.8"

KAdot — Thu, 28 May 2026 18:41:37 +0000

Going back to 4.7 with `claude --model claude-opus-4-7` fixed it for me.

New comment by KAdot in "Spanner Omni, a downloadable version of Google Spanner"

KAdot — Wed, 22 Apr 2026 22:11:11 +0000

Is it closed source?

New comment by KAdot in "How we replaced Elasticsearch and MongoDB with Rust and RocksDB"

KAdot — Sat, 09 Aug 2025 01:26:51 +0000

This is not my experience. I've been running RocksDB for 4 years on thousands of machines, each storing terabytes of data, and I haven't seen a single correctness issue caused by RocksDB.

New comment by KAdot in "OpenTelemetry protocol with Apache Arrow"

KAdot — Tue, 13 May 2025 20:51:55 +0000

> We are interested in making OTAP pipelines safely embeddable, through strict controls on memory and through support for thread-per-core runtimes.

I'm curious about the thread-per-core runtimes, are there even any mature thread-per-core runtimes in Rust around?

New comment by KAdot in "Show HN: voidDB – A transactional key-value DB written in Go for 64-bit Linux"

KAdot — Fri, 31 Jan 2025 16:30:37 +0000

The benchmark doesn't accurately represent the real-world database performance because the dataset is too small (roughly half a gigabyte based on [1]?), meaning it fits into the page cache bypassing disk I/O.

[1]: https://github.com/voidDB/voidDB/blob/master/test/bench_test...

Timeseries Indexing at Scale

KAdot — Tue, 09 Jul 2024 15:30:55 +0000

Article URL: https://artem.krylysov.com/blog/2024/06/28/timeseries-indexing-at-scale/

Comments URL: https://news.ycombinator.com/item?id=40917267

Points: 3

# Comments: 0

Timeseries Indexing at Scale

KAdot — Fri, 28 Jun 2024 19:57:25 +0000

Article URL: https://www.datadoghq.com/blog/engineering/timeseries-indexing-at-scale/

Comments URL: https://news.ycombinator.com/item?id=40824617

Points: 4

# Comments: 0

New comment by KAdot in "Fivefold Slower Compared to Go? Optimizing Rust's Protobuf Decoding Performance"

KAdot — Mon, 15 Apr 2024 14:39:27 +0000

The benchmark is not comparing apples to apples.

prost is the most widely used Protobuf implementation in Rust, maintained by the Tokio organization. prost generates structs and serialization/deserialization code for you.

easyproto according to GitHib Search is used only by two projects. easyproto provides primitives for serializing and deserializing Protobuf, and requires hand writing code to do both.

A fair comparison would be prost vs google.golang.org/protobuf, or easyproto vs parts of quick-protobuf.

In most cases you can make Go as fast as Rust, but from my experience writing performance-sensitive code in Go requires significantly larger time investment and overall requires deeper language expertise. Pebble (RocksDB replacement in Go by CockroachDB) is a good example of this, the codebase is littered with hand-inlined[1] functions, hand-unrolled loops and it's not[2] even using Go memory management for performance critical parts, it's using the C memory allocator and manual memory management.

[prost]: https://github.com/tokio-rs/prost [easyproto]: https://github.com/VictoriaMetrics/easyproto [google.golang.org/protobuf]: https://github.com/protocolbuffers/protobuf-go [quick-protobuf]: https://github.com/tafia/quick-protobuf [1]: https://github.com/cockroachdb/pebble/blob/c34894c46703fd823... [2]: https://github.com/cockroachdb/pebble/blob/master/docs/memor...

New comment by KAdot in "Redis has a new brand"

KAdot — Wed, 10 Apr 2024 12:13:00 +0000

The redis.io landing page says "from the ones who built it" just wow.

New comment by KAdot in "Yuzu emulator developers settle Nintendo lawsuit, pay $2.4M in damages"

KAdot — Mon, 04 Mar 2024 19:30:29 +0000

https://github.com/pineappleEA/pineapple-src

New comment by KAdot in "Yuzu emulator developers settle Nintendo lawsuit, pay $2.4M in damages"

KAdot — Mon, 04 Mar 2024 19:16:24 +0000

The project is gone from GitHub already https://github.com/yuzu-emu/yuzu

New comment by KAdot in "My MacBook Setup (the 2024 version)"

KAdot — Sat, 17 Feb 2024 15:06:47 +0000

> After discovering Chrome are eating my old Mac's battery, I turned to using Edge

What? Have they tried using Safari instead of a Chromium based browser? From my experience Safari is by far the best browser on Mac in terms of the energy efficiency.

New comment by KAdot in "Zed, a collaborative code editor, is now open source"

KAdot — Wed, 24 Jan 2024 18:02:58 +0000

Is there a way to disable all "collaborative" features, including removing the "Sign in" button?

New comment by KAdot in "Sparkey: A simple constant key/value storage library"

KAdot — Thu, 04 Jan 2024 19:25:43 +0000

A similar idea implemented in Go https://github.com/akrylysov/pogreb (disclaimer: I'm the author of this package).

New comment by KAdot in "Apple unveils M3, M3 Pro, and M3 Max"

KAdot — Tue, 31 Oct 2023 01:48:06 +0000

The performance is not that great, but you can already play Cyberpunk 2077 on a M2 Pro laptop using Game Porting Toolkit https://www.youtube.com/watch?v=sPJpkRmsceU Keep in mind, it has to do x64 -> ARM64 transition and translate Direct X into Metal. I would expect a native version to work better.

New comment by KAdot in "Ask HN: Could you share your personal blog here?"

KAdot — Tue, 04 Jul 2023 19:16:34 +0000

https://artem.krylysov.com/blog/ I'm writing mostly about databases and performance.

My last two posts:

- How RocksDB works https://artem.krylysov.com/blog/2023/04/19/how-rocksdb-works...

- Let's build a Full-Text Search engine https://artem.krylysov.com/blog/2020/07/28/lets-build-a-full...

New comment by KAdot in "A toy programming language in 137 lines of Python code"

KAdot — Mon, 03 Jul 2023 02:27:27 +0000

Great article. If someone is looking for a more advanced example, some time ago, as an exercise, I created an interpreter for a Python-like language in Python https://github.com/akrylysov/abrvalg