#performance

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Programming 17 Sep 2026 5 min read

Profile Before You Optimise: A Five-Minute Habit

Most “slow” code is not slow where you think it is. Measure first, fix second — here is the five-minute loop, from flame graphs to the number you paste into a pull request.

khallaf Tip

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Web Development 15 Sep 2026 5 min read

Core Web Vitals in practice

What LCP, INP and CLS actually measure, what breaks each score, and the highest-leverage fixes in the order that pays off fastest for real users.

khallaf Tip

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Programming 7 Sep 2026 5 min read

Find the Slow Query Before Your Users Do

Nobody complains about a 40 ms query. Everybody complains about four hundred of them per page. Read EXPLAIN column by column, and find the N+1 before your users do.

khallaf Tip