Node on FIRE! Optimizing Callback Handler Performance in Aerospike Node.js

The Aerospike Node.js client's performance was significantly improved in version 2 with a switch to asynchronous, non-blocking I/O and adoption of error-first callback semantics. However, late in the development cycle, significant performance degradation was noticed due to the use of variable-length argument lists in the new callback handler function. After several iterations, a 34x gain in callback handling performance was achieved by using static function arguments instead of the special arguments object. This optimization was included in the first patch release v2.0.1.