DevTools

Find Slow CSS Selectors with Edge DevTools

Discover how Microsoft Edge DevTools reveals expensive CSS selectors slowing down your pages.

aggregate functions

SQL FILTER vs CASE: Postgres Benchmark Surprises

Postgres benchmark shows SQL FILTER is faster than CASE for filtered aggregates, plus a workaround for older databases that lack…

iOS

Copy-on-Write in Swift: What Android Users Should Know

A betterprogramming.pub article explains copy-on-write in Swift. Here's what the performance trick means for Android users and app builders.

benchmarking

PyPy vs CPython: A Hands-On Speed Comparison

PyPy can outrun CPython on pure-Python code, but the toolchain is fiddly. Here is what benchmarking a real RPython program…

Article

The Web Performance Tools Getting Major Upgrades—and Why That Matters

Web performance tooling is advancing rapidly. Here's what developers and users need to know about the latest upgrades.