Benchmark: spread vs manual vs assign

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

function mapObjectSpread(obj) {
    return {
        ...obj,
        id: obj.objId
    };
}

function mapObjectLiterally(obj) {
    return {
        objId: obj.objId,
        a: obj.a,
        b: obj.b,
        c: obj.c,
        id: obj.objId
    };
}

function mapObjectAssign(obj) {
    return Object.assign({}, obj, {
        id: obj.objId
    });
}

const objs = [];
for (let i = 0; i < 10000; i++) {
    objs.push({
        a: "a",
        b: "b",
        c: "c",
        objId: i
    });
}

Tests:

spread
objs.forEach(mapObjectSpread);
literal
objs.forEach(mapObjectLiterally);
assign
objs.forEach(mapObjectAssign);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread
literal
assign

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 11 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36

Browser/OS: Chrome 140 on Mac OS X 10.15.7

View result in a separate tab

literal

94K/s

spread

10K/s

assign

4K/s

View exact numbers

Test name	Executions per second
✓ literal	94,119 Ops/sec
spread	9,509 Ops/sec
assign	4,240 Ops/sec

spread vs manual vs assign (version: 1)

Comparing performance of: `spread vs literal vs assign`

Created: 11 months ago by: Guest

Go to the latest result

spread

literal

assign

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

spread vs manual vs assign (version: 1)

Comparing performance of: spread vs literal vs assign

Created: 11 months ago by: Guest

Go to the latest result

spread

literal

assign

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Related benchmarks

Comparing performance of: `spread vs literal vs assign`