Array.prototype.concat vs spread operator - Immutable version (version: 0)
Compare the new ES6 spread operator with the traditional concat() method. All methods create a fresh array to simulate an environment where immutable data is a requirement.
Comparing performance of: Array.prototype.concat vs spread operator vs Lodash merge
Memory measurements supported only in Chrome.
For precise memory measurements Chrome must be launched with --enable-precise-memory-info flag.
More information: Monitoring JavaScript Memory