How to Build High‑Performance Native Node.js Modules with NAN
This article explains why and when to write native Node.js modules in C/C++, outlines performance‑critical scenarios, OS‑level hooking, and library bridging, and provides a step‑by‑step guide to using the NAN library to simplify development despite V8 API changes.
Node.js native modules are frequently used (e.g., built‑in modules such as fs, net, dns), but they are rarely written by developers because they are implemented in C/C++ and exposed to JavaScript through V8.
In real‑world development, certain situations require writing native modules, such as:
Applications with extremely high performance demands, where Node.js excels at asynchronous I/O but lags in heavy numeric computation.
Hooking low‑level operating‑system APIs.
Creating bridges between C/C++ libraries and Node.js.
Because V8’s API changes frequently, the official nan module was created to help developers write native Node.js addons more easily. The following guide walks through building a native module with nan step by step.
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