Blog / concurrency

Posts tagged concurrency

2 posts filed under this topic.

• MVCC Is a Time Machine With a Cleanup Problem — How PostgreSQL gives every transaction a consistent snapshot, why Repeatable Read still allows write skew, what Serializable actually adds, and why a long transaction is a vacuum emergency. 2026-11-03 · 18 min read
• The Event Loop Is a Scheduler, Not a Queue — A deep guide to how JavaScript runs timers, promises, rendering, and I/O on one thread — in browsers and in Node.js — and why "setTimeout(fn, 0)" is not a promise to run immediately. 2026-10-30 · 18 min read