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Run results for: Array.prototype.concat vs spread operator - Immutable version

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.

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36
Chrome 65
Mac OS X 10.13.3
Other
6 years ago
Test name Executions per second
Array.prototype.concat 50892.4 Ops/sec
spread operator 388.6 Ops/sec
Lodash merge 2122.1 Ops/sec
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Script Preparation code:
Tests:

  • Array.prototype.concat

  • spread operator

  • Lodash merge