Run results for: Passing objects with raw values vs passing just raw values vs array of values (add obj & array init cost)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser: Chrome 114

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Pass object	6611711.0 Ops/sec
Pass object with new obj	4755817.0 Ops/sec
Pass raw values	4750840.0 Ops/sec
Pass array	6462040.5 Ops/sec
Pass array with new array	3981202.0 Ops/sec

Script Preparation code:

var a = "Here's a string value";
var b = 5; // and a number
var c = false;

var object = {
  a, b, c
}

var array = [
  a, b, c
];

var passObject = (obj) => {
  return obj.a.length + obj.b * obj.c ? 2 : 1;
}

var passRawValues = (val_a, val_b, val_c) => {
  return val_a.length + val_b * val_c ? 2 : 1;
}

var passArray = (arr) => {
  return arr[0].length + arr[1] * arr[2] ? 2 : 1;
}


var x = 0;

Tests:

Pass object
x << 1; x ^= passObject(object);
Pass object with new obj
x << 1; x ^= passObject({ a: a, b: b, c: c });
Pass raw values
x << 1; x ^= passRawValues(a, b, c);
Pass array
x << 1; x ^= passArray(array);
Pass array with new array
x << 1; x ^= passArray(array = [a, b, c]);

Run results for: Passing objects with raw values vs passing just raw values vs array of values (add obj & array init cost)

Updated because it looks like Firefox optimizes away the entire test

Pass object

Pass object with new obj

Pass raw values

Pass array

Pass array with new array