Get time passed since you've started node.js process.
// 1. Set global.appStartTime before you load any node.js modules.
global[Symbol.for('start-time')] = Date.now()
// 2. The following line would return a prepared for output string.
require('since-app-start').addEntry('Loaded modules')
MIT (c) 2016 Paul Miller (http://paulmillr.com)