Run results for: structuredCloneEmulation2

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36

Browser: Chrome 97

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
fori	1197.8 Ops/sec
cur	217.1 Ops/sec

Script Preparation code:

var cur = (obj) => {
    let clone;
    if (Array.isArray(obj)) {
        clone = [];
        for (const x of obj) {
            clone.push(cur(x));
        }
    } else if (obj !== null && typeof obj === 'object') {
        clone = {};
        for (const [k, v] of Object.entries(obj)) {
            clone[k] = cur(v);
        }
    } else if (ArrayBuffer.isView(obj)) {
        throw new TypeError("TypedArray not implemented");
    } else if (obj instanceof ArrayBuffer) {
        throw new TypeError("ArrayBuffer not implemented");
    } else if (obj != null && !['string', 'number', 'boolean'].includes(typeof obj)) {
        throw new TypeError("Unexpected primative type");
    } else {
        clone = obj;
    }
    return clone;
};

var fori = (obj) => {
    if (obj) {
        const objType = typeof obj;
        if (obj.length !== undefined && obj instanceof Array) {
            const clone = Array.from(obj);
            for (let i = 0, len = obj.length; i < len; i++) {
                const v = obj[i];
                const vType = typeof v;
                if (v && vType !== 'string' && vType !== 'number' && vType !== 'boolean') {
                    clone[i] = fori(v);
                }
            }
            return clone;
        } else if (obj !== null && objType === 'object') {
            const clone = {
                ...obj
            };
            const keys = Object.keys(obj);
            for (let i = 0, len = keys.length; i < len; i++) {
                const v = obj[keys[i]];
                const vType = typeof v;
                if (v && vType !== 'string' && vType !== 'number' && vType !== 'boolean') {
                    clone[keys[i]] = fori(v);
                }
            }
            return clone;
        } else if (objType === 'string' || objType === 'number' || objType === 'boolean') {
            return obj;
        } else {
            throw new TypeError("Unexpected type");
        }
    } else {
        return obj;
    }
    return clone;
};



var data = Array.from(Array(1000)).map((x, i) => ({
    i,
    b: [1, 2, 3, 5, 6, 7],
    c: 111,
    d: 222,
    e: {
        aa: 1,
        bb: 1
    },
    b: false,
    s: 'asdfaasdfaasdfasdfasdf',
    n: null,
}));

Tests:

fori
fori(data);
cur
cur(data);