isaacs/node-lru-cache — pull request #23 by ashleybrener (2013-08-05 15:17:40+00:00)
Title: replaced 'Object.create(null)' with '{}'

Our application requires setting up multiple LRU's on the fly, hence I am optimizing wherever performance gains are tangible.

According to http://jsperf.com/object-creation-battle, object creation using

x = {};

is more than 20 times faster than

x = Object.create(null);

//A