Benchmark: Array Spread vs Array concat (with object dataset)

Tests:

Array Concat (w/ objects)
const arr1 = [{ "name": "Field1", "width": 20, "boolProp": false, "visible": true, "id": 1 }, { "name": "Field2", "width": 10, "boolProp": false, "visible": true, "id": 2 }, { "name": "Field3", "width": 20, "boolProp": false, "visible": true, "id": 3 }, { "name": "Field4", "width": 10, "boolProp": false, "visible": true, "id": 4 }]; const arr2 = [{ "name": "Field5", "width": 20, "boolProp": false, "visible": true, "id": 1 }, { "name": "Field6", "width": 10, "boolProp": false, "visible": true, "id": 2 }, { "name": "Field7", "width": 20, "boolProp": false, "visible": true, "id": 3 }, { "name": "Field8", "width": 10, "boolProp": false, "visible": true, "id": 4 }]; const arr3 = arr1.concat(arr2);
Spread (w/ objects)
const arr1 = [{ "name": "Field1", "width": 20, "boolProp": false, "visible": true, "id": 1 }, { "name": "Field2", "width": 10, "boolProp": false, "visible": true, "id": 2 }, { "name": "Field3", "width": 20, "boolProp": false, "visible": true, "id": 3 }, { "name": "Field4", "width": 10, "boolProp": false, "visible": true, "id": 4 }]; const arr2 = [{ "name": "Field5", "width": 20, "boolProp": false, "visible": true, "id": 1 }, { "name": "Field6", "width": 10, "boolProp": false, "visible": true, "id": 2 }, { "name": "Field7", "width": 20, "boolProp": false, "visible": true, "id": 3 }, { "name": "Field8", "width": 10, "boolProp": false, "visible": true, "id": 4 }]; const arr3 = [...arr1, ...arr2];

Rendered benchmark preparation results:

Previous results

Test case name	Result
Array Concat (w/ objects)
Spread (w/ objects)

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Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36

Browser/OS: Chrome 67 on Mac OS X 10.13.6

Test name	Executions per second
Array Concat (w/ objects)	5688744.0 Ops/sec
Spread (w/ objects)	8658480.0 Ops/sec

Array Spread vs Array concat (with object dataset) (version: 0)