The 200ms latency: A developer’s guide to real-time personalization
For engineers building high-concurrency applications in e-commerce, fintech or media, the “200ms limit” is a hard ceiling. It is the psychological threshold where interaction feels instantaneous. If a personalized homepage, search result or “Up Next” queue takes longer than 200 milliseconds to load, user abandonment spikes. There is a famous study from Amazon showing that…