Run results for: If vs or equality check and re-assignment

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser: Chrome 116

Operating system: Linux

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
if re-assignment	5007923.5 Ops/sec
Or re-assignment	4826373.0 Ops/sec

Script Preparation code:

var jsonObject = {};

for (let i = 0; i < 500; i++) {
  const key = `key_${i}`;
  const value = Math.random() + 1; // You can replace this with any desired value.
  jsonObject[key] = value;
}

Tests:

if re-assignment
if (!jsonObject['key-250']) { jsonObject['key-250'] = 0 }
Or re-assignment
jsonObject['key-250'] = jsonObject['key-250'] || 0

Run results for: If vs or equality check and re-assignment

if re-assignment

Or re-assignment