PostgreSQL's Multirange Type Implementation in C: One Format, Six Types
All six multirange types share one implementation: a 12-byte header, 32-bit items that store lengths by default and absolute offsets every fourth entry, plus a flags array.
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tmux Works Around Terminal Bugs: Believe Nothing, Probe Everything
tmux treats terminal capabilities as unverified claims. It layers terminfo, user overrides, named features, runtime probing and a hard-coded table of per-terminal quirks — and…
PostgreSQL Does Async I/O with io_uring: A Closed-Loop Read-Ahead Controller
PostgreSQL 20’s AIO subsystem has an io_uring backend plus a read-ahead controller that doubles its look-ahead distance only when the backend actually had to wait for I/O.
tmux Redraws Only What Changed: Five Layers of Less Work
tmux never redraws ’the screen’ — it redraws the difference.
PostgreSQL's macaddr and macaddr8 Implementation in C: Six Bytes, Eight Bytes, One Marker
macaddr8 accepts six-byte EUI-48 input and rewrites it by inserting FF FE in the middle — the marker that makes conversion back to macaddr reversible.