top speed to generate a unique ID that's never repeat

Generate A Unique ID Like: UsH0mUQ-AKABBvCI-NEF-A

Every request will increase last fragment, others are fixed.

• first is a microtime of start
• second is the ip each 2 digit indicate a ip fragment
• third is the pid
• last is the self-increase id

Usage

requireID = require('requestid')
requireID() // UsH0mUQ-AKABBvCI-NEF-A