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Ask HN: Teach Me Something New

Hacker News - Sat, 07/25/2026 - 4:22am

Comments URL: https://news.ycombinator.com/item?id=49045643

Points: 1

# Comments: 1

Categories: Hacker News

Show HN: Elizabeth Line Guide (London) – Live departures, timetables, fares

Hacker News - Sat, 07/25/2026 - 3:48am

Hi,

Sorry, this is a bit London (UK) centric!

I built this as a little side project as I had the following issues when travelling on the Elizabeth Line:

- Hard to get live departures for my destination/line - Hard to get timetable times (which I need when I get off a flight at Heathrow and need to find if I can catch the next train) - Hard to get fare information between two stops

I took a look at the keyword stats and there are not too many competitors. The site is hovering in the second page of google at the moment, but that is with zero promotion.

Hopefully helps anyone the next time they're travelling on the Liz Line.

Comments URL: https://news.ycombinator.com/item?id=49045428

Points: 1

# Comments: 0

Categories: Hacker News

PostgreSQL Extension Catalog

Hacker News - Sat, 07/25/2026 - 3:38am

Article URL: https://pgext.cloud

Comments URL: https://news.ycombinator.com/item?id=49045376

Points: 1

# Comments: 0

Categories: Hacker News

The Cretan Method

Hacker News - Sat, 07/25/2026 - 3:38am

Article URL: http://hintjens.com/blog:81

Comments URL: https://news.ycombinator.com/item?id=49045372

Points: 1

# Comments: 0

Categories: Hacker News

Show HN: BlazeRules – YAML rule engine for streaming data, 5M records/SEC

Hacker News - Sat, 07/25/2026 - 3:37am

https://blazerules.dev

I initially wanted to make a sub-millisecond log parser in C++ but that blew into a embeddable decision engine, that can run YAML defined rules on incoming data. The rules are executed in a vectorized format on incoming data by reprojecting into a columnar format first, if it's not already. Depending on the payload size and rules complexity, the performance goes from 200K records/s to more than million records/sec, in terms of througput this would be around 200 MiB/s to 3 GiB/s on average.

Rules can be sql expressions too, or onnx models (numeric), window ops and quite a few more operations are supported.

It's comparable to DuckDB but for streaming data and on the fly decisions

Comments URL: https://news.ycombinator.com/item?id=49045369

Points: 1

# Comments: 0

Categories: Hacker News

Prompt Caching

Hacker News - Sat, 07/25/2026 - 3:21am
Categories: Hacker News

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