Run results for: "In" vs "Undefined" property access

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Safari/537.36

Browser: Chrome 84

Operating system: Mac OS X 10.15.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
In	910585216.0 Ops/sec
property access	890177536.0 Ops/sec

Tests:

In
const foo = {} const a = 'status' in foo ? 1 : 0; const b = 'dog' in foo ? 0 : 1; const c = 'shaggy' in foo ? 2 : 1; const d = 'the' in foo ? 100000 : 10323;
property access
const foo = {} const a = foo.status ? 1 : 0; const b = foo.dog ? 0 : 1; const c = foo.shaggy ? 2 : 1; const d = foo.the ? 100000 : 10323;