eval-debug

A wrapper around debug if you are worried about the performance penalty of creating logging data in production mode.

usage

const createDebug = require('harrysarson/eval-debug');

const debug = createDebug('namespace');

debug('%e', expensiveFunction);

// will log the return value of expensiveFunction(). 
// expensiveFunction() will not be called unless debug is enabled

warning

Conditionally running code dependant on whether or not debugging is enabled is an anti-pattern. This could lead to errors in production code that disapear when you try to debug them causing everyone involved a lot of grief.

See https://github.com/visionmedia/debug/pull/497.