Run results for: set num vs set fnCall vs typecheck then set

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36

Browser: Chrome 102

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
setNumber	13312209.0 Ops/sec
setCall	6746080.5 Ops/sec
setTypecheck(num)	13313842.0 Ops/sec
setTypecheck(call)	6710818.5 Ops/sec

Script Preparation code:

var obj = { a:1 }

function setNumber(key, value) {
  obj[key] = value;
}

function setCall(key, getValue) {
  obj[key] = getValue(obj);
}

function setTypecheck(key, value) {
  obj[key] = typeof value === "number" ? value : value(obj);
}

function getValue() {
  return 100;
}

Tests:

setNumber
setNumber("a", 100);
setCall
setCall("a", getValue);
setTypecheck(num)
setTypecheck("a", 100);
setTypecheck(call)
setTypecheck("a", getValue);

Run results for: set num vs set fnCall vs typecheck then set

setNumber

setCall

setTypecheck(num)

setTypecheck(call)