ES6: Add performance background from V8 team (#1038)
ES6: Add performance background from V8 team (#1038)

The V8 team is working on ES2015 and beyond feature performance that
will be very relevant to Node.js developers, as they don't need to pay
attention to outdated browsers.
nodejs/new.nodejs.org,phillipj/new.nodejs.org,nodejs/new.nodejs.org,yous/new.nodejs.org,yous/new.nodejs.org,phillipj/new.nodejs.org