Benchmark: Omit performance

Script Preparation code:

var arr = [];

for (let i = 0; i < 100000; i++) {
    arr.push({
        value: i,
        textValue: 'text-' + i + '' + Math.random(),
        createdAt: Math.random(),
        createdBy: Math.ceil(Math.random() + 10),
        updatedAt: i,
        updatedBy: Math.ceil(Math.random() + 10),
    })
}

var omitInline = (obj, keys) => {
    const newObj = {
        ...obj
    };

    if (keys.length > 4) {
        return keys.reduce((acc, key) => {
            delete acc[key];

            return acc;
        }, newObj);
    }

    delete newObj[keys[0]];

    if (keys.length === 1) return newObj;

    delete newObj[keys[1]];

    if (keys.length === 2) return newObj;

    delete newObj[keys[2]];

    if (keys.length === 3) return newObj;

    delete newObj[keys[3]];

    return newObj;
}

var omitReduce = (obj, keys) => {
    const newObj = {
        ...obj
    };

    if (keys.length > 3) {
        return keys.reduce((acc, key) => {
            delete acc[key];

            return acc;
        }, newObj);
    }

    delete newObj[keys[0]];

    if (keys.length === 1) return newObj;

    delete newObj[keys[1]];

    if (keys.length === 2) return newObj;

    delete newObj[keys[2]];

    return newObj;
}


var omitFor = (obj, keys) => {
    const newObj = {
        ...obj
    };

    if (keys.length > 3) {
        for (let i = 0; i <= keys.length; i++) {
            delete newObj[keys[i]];
        }

        return newObj
    }

    delete newObj[keys[0]];

    if (keys.length === 1) return newObj;

    delete newObj[keys[1]];

    if (keys.length === 2) return newObj;

    delete newObj[keys[2]];

    return newObj;
}

var omitForOf = (obj, keys) => {
    const newObj = {
        ...obj
    };

    if (keys.length > 3) {
        for (const key of keys) {
            delete newObj[key];
        }

        return newObj
    }

    delete newObj[keys[0]];

    if (keys.length === 1) return newObj;

    delete newObj[keys[1]];

    if (keys.length === 2) return newObj;

    delete newObj[keys[2]];

    return newObj;
}

var omitEntries = (obj, keys) => {
    const newObj = {
        ...obj
    };

    if (keys.length > 3) {
        return Object.fromEntries(Object.entries(obj).filter(entry => !keys.includes(entry[0])))
    }

    delete newObj[keys[0]];

    if (keys.length === 1) return newObj;

    delete newObj[keys[1]];

    if (keys.length === 2) return newObj;

    delete newObj[keys[2]];

    return newObj;
}

Tests:

Omit Inline
return arr.map(item => omitInline(item, ['createdAt', 'createdBy', 'updatedAt', 'updatedBy']))
Omit For
return arr.map(item => omitFor(item, ['createdAt', 'createdBy', 'updatedAt', 'updatedBy']))
Omit ForOf
return arr.map(item => omitForOf(item, ['createdAt', 'createdBy', 'updatedAt', 'updatedBy']))
Omit Entries
return arr.map(item => omitEntries(item, ['createdAt', 'createdBy', 'updatedAt', 'updatedBy']))
Omit Reduce
return arr.map(item => omitReduce(item, ['createdAt', 'createdBy', 'updatedAt', 'updatedBy']))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Omit Inline
Omit For
Omit ForOf
Omit Entries
Omit Reduce

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser/OS: Chrome 120 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Omit Inline	38.4 Ops/sec
Omit For	37.4 Ops/sec
Omit ForOf	38.1 Ops/sec
Omit Entries	17.7 Ops/sec
Omit Reduce	36.2 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark is designed to measure the performance of different approaches for omitting specific properties from objects in JavaScript. The input data is an array of objects, `arr`, which contains 100,000 items with various properties (e.g., `value`, `textValue`, `createdAt`, `createdBy`, etc.).

**Individual Test Cases**

There are four test cases:

1. **Omit Inline**: Uses the `omitInline` function to remove the specified properties from each object in the array.
2. **Omit For**: Uses the `omitFor` function to achieve the same result as `omitInline`.
3. **Omit ForOf**: Uses the `omitForOf` function, which is similar to `omitInline`, but with a different implementation.
4. **Omit Reduce**: Uses the `omitReduce` function, which applies a reduce operation to the array of objects.

**Latest Benchmark Result**

The benchmark results show the performance metrics for each test case, including:

* `RawUAString`: The user agent string (e.g., "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36")
* `Browser`: The browser name and version (Chrome 120)
* `DevicePlatform`: The device platform (Desktop)
* `OperatingSystem`: The operating system (Mac OS X 10.15.7)
* `ExecutionsPerSecond`: The number of executions per second for each test case

**Interpretation**

The benchmark results show that:

* **Omit Inline** and **Omit ForOf** have similar performance profiles, with Chrome 120 executing approximately 38-40 times per second.
* **Omit For** has slightly worse performance compared to the other two approaches (around 36-37 times per second).
* **Omit Reduce** has the worst performance among all test cases (around 17 times per second).

In summary, the benchmark results suggest that `omitInline` and `omitForOf` are the most efficient approaches for omitting properties from objects in JavaScript, while `omitReduce` may not be suitable for large datasets due to its performance characteristics.

Related benchmarks:

Omit performance (version: 0)

Comparing performance of: Omit Inline vs Omit For vs Omit ForOf vs Omit Entries vs Omit Reduce

Created: 2 years ago by: Guest

Jump to the latest result

Omit Inline

Omit For

Omit ForOf

Omit Entries

Omit Reduce

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):