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Debug memory leaks systematically. Learn heap snapshots, heapdump module, Chrome DevTools analysis, WeakRef patterns, and V8 GC tuning for production stability.
Master Node.js profiling with Clinic.js and V8 flame graphs. Identify CPU-bound code, async bottlenecks, and memory leaks before they impact production.
Node 22 makes the permission model stable. Restrict file system, network, and child process access with --allow-fs-read, --allow-net, and more. Essential for multi-tenant systems.
Harden Node.js with Helmet.js headers, rate limiting with Redis, SQL injection prevention, prototype pollution fixes, audit automation, privilege dropping, and --frozen-intrinsics.
Node 22.5+ includes native SQLite via node:sqlite. Run queries without external libraries, dependencies, or server setup. Perfect for CLIs, edge functions, and local-first apps.