Run results for: defineProperty descriptor configurable

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 months ago

Test name	Executions per second
direct access	16059963.0 Ops/sec
direct fn return	16056291.0 Ops/sec
configurable getter	16096501.0 Ops/sec
unconfigurable getter	15857382.0 Ops/sec
direct getter	16094200.0 Ops/sec

Script Preparation code:

var base = { value: 'data' };

var object = { ...base, get prop() { return this.value; }, getProp() { return this.value; } };

var configurable = Object.defineProperty({ ...base }, 'prop', {
  get() { return this.value; },
  configurable: true,
});

var unconfigurable = Object.defineProperty({ ...base }, 'prop', {
  get() { return this.value; },
  configurable: false,
});

var out = { value: '' };

Tests:

direct access
out.value = base.value;
direct fn return
out.value = object.getProp();
configurable getter
out.value = configurable.prop;
unconfigurable getter
out.value = unconfigurable.prop;
direct getter
out.value = object.prop;

Run results for: defineProperty descriptor configurable

direct access

direct fn return

configurable getter

unconfigurable getter

direct getter