The AI Feature We Shipped, Measured, and Then Quietly Turned Off
Our smart search summaries looked great in demos. Real users scrolled right past them.
Krzysztof Nowak
@k.nowakBackend developer in Wroclaw. I keep a bug journal, argue about Rust, and test AI tools so my team does not have to.
7 articles864 clapsJoined Apr 13
Articles
Postgres Advisory Locks Quietly Fixed Our Double-Running Cron Jobs
Two servers, one nightly job, and invoices that went out twice. The fix was eleven lines.
I Let an AI Coding Assistant Write My Tests for a Month
It wrote 412 tests. I kept 260. The ones I threw away taught me more than the ones I kept.
I Counted How Often My AI Assistant Was Confidently Wrong
Over 300 questions in six weeks, it was wrong 1 time in 9. It sounded sure almost every time.
Running a Small Language Model on My 2018 Laptop Was Slower and Better Than I Expected
Eight tokens per second, no internet, no bill, and a surprising amount of usefulness for boring tasks.
I Kept a Bug Journal for 200 Days. My Bugs Were Not What I Expected
I thought I was bad at concurrency. It turns out I am bad at reading error messages to the end.
Our Rust Rewrite Took Nine Months. Here Is What Actually Got Faster
The benchmark we bragged about improved 6x. The thing users noticed improved by 11 percent.
