Master The Node.js Internals

NodeBook explains what happens inside the runtime when your application handles I/O, schedules work, allocates memory, and serves traffic.

Libuv & Event Loop Internals
Understand poll/check/idle phases, threadpool queueing, and platform differences across epoll, kqueue, and IOCP.

02
V8 Compilation Pipeline
Debug deoptimizations, hidden class transitions, and polymorphic inline cache misses with practical examples.

03
Zero-Copy Stream Architecture
Implement binary protocols with backpressure-aware transforms, scatter/gather I/O, and external memory management.

04
Native Addon Development
Build thread-safe N-API modules, move work through uv_queue_work, and handle memory across JavaScript and C++ boundaries.

05
Production Observability
Propagate trace context with AsyncLocalStorage, control metrics cardinality, and analyze latency with flamegraphs.

06
Production Memory Management
Tune generational GC flags, track retainers in heap snapshots, handle external memory pressure and OOM mitigation.

Who this
is for

Application developer
Common gaps

Uses frameworks well, but has limited runtime visibility

Finds memory leaks late, often after production symptoms

Handles large payloads without always measuring allocation cost

Needs clearer tools for profiling, backpressure, and shutdown behavior

Runtime-focused engineer
Profiles V8 heap snapshots and allocation paths

Implements backpressure with streams

Moves CPU-bound work to Worker Threads when needed

Operates Node.js services with clear deployment and scaling tradeoffs