Run results for: in vs hasOwnProperty vs bool vs typeof vs hasOwn

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36

Browser: Chrome 117

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
in	33662568.0 Ops/sec
hasOwnProperty	24662660.0 Ops/sec
hasOwn	10334555.0 Ops/sec
bool	33432852.0 Ops/sec
typeof	33481634.0 Ops/sec

Script Preparation code:

var pages = {
    "0-0": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-1": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-2": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-3": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-4": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-5": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-6": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-7": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-8": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-9": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-10": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-11": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-12": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-13": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-14": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-15": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-16": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-17": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-18": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-19": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-20": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-21": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-22": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] },
    "0-23": { "programs": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] }
}

Tests:

in
"0-12" in pages
hasOwnProperty
pages.hasOwnProperty("0-12")
hasOwn
Object.hasOwn(pages, "0-12")
bool
!!pages["0-12"]
typeof
typeof pages["0-12"] !== "undefined"