Run results for: Delete vs destructure for objects without mutating-many

Run details:

User agent: Mozilla/5.0 (Linux; Android 10; YAL-L21; HMSCore 6.6.0.352; GMSCore 22.26.15) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.105 HuaweiBrowser/12.1.1.324 Mobile Safari/537.36

Browser: Chrome 92

Operating system: Android

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
delete	613378.6 Ops/sec
Rest object	274958.5 Ops/sec

Script Preparation code:

function foo() {
    return {
        a: "asjldfhsajklhdfdakjfklsahjc",
        b: "asjldfhsajklhdfdakjfklsahjc",
        c: "asjldfhsajklhdfdakjfklsahjc",
        d: "asjldfhsajklhdfdakjfklsahjc",
        e: "asjldfhsajklhdfdakjfklsahjc",
        f: "asjldfhsajklhdfdakjfklsahjc",
        g: "asjldfhsajklhdfdakjfklsahjc",
        h: "asjldfhsajklhdfdakjfklsahjc",
        i: "asjldfhsajklhdfdakjfklsahjc",
        j: "asjldfhsajklhdfdakjfklsahjc",
        k: "asjldfhsajklhdfdakjfklsahjc",
        l: "asjldfhsajklhdfdakjfklsahjc",
        m: "asjldfhsajklhdfdakjfklsahjc",
        n: {
            a: "asjldfhsajklhdfdakjfklsahjc",
            b: "asjldfhsajklhdfdakjfklsahjc",
            c: "asjldfhsajklhdfdakjfklsahjc",
            d: "asjldfhsajklhdfdakjfklsahjc",
            e: "asjldfhsajklhdfdakjfklsahjc"
        }
    };
}

Tests:

delete
const obj = foo(); delete obj.d; delete obj.n.c
Rest object
const { d, ...rest } = foo(); delete rest.n.c

Run results for: Delete vs destructure for objects without mutating-many

Measure the performance of delete versus removing a prop from an object without mutating

delete

Rest object