Topic

performance-debugging

Everything filed under performance-debugging, across every section.

2 articles

software-engineering
How to Investigate Node.js Latency With Event-Loop Metrics, Not CPU Alone
Learn to distinguish a blocked Node.js event loop from slow downstream I/O using event-loop delay, event-loop utilization, request timing, and CPU measurements. Includes instrumentation code, a diagnosis matrix, and concrete remediation decisions.
Aug 21, 202612 min read
software-engineering
Debug Slow Node.js Requests with Event-Loop Delay, Utilization, and Controlled Load
A Node.js process can remain running, pass a health check, and still make every request slow. This practical guide shows how to reproduce that failure, collect event-loop metrics beside latency, and decide whether the event loop is actually the bottleneck.
Aug 19, 202612 min read