var omit1 = (originalObj = {}, keysToOmit = []) =>

    Object.fromEntries(

        Object.entries(originalObj)

        .filter(([key]) => !keysToOmit.includes(key))

    )

​

var omit2 = new Function('obj', 'if (!obj) return {}; const { a, d, i, ...res } = obj; return res;');

​

var omit3 = (originalObject = {}, keysToOmit = []) => {  

    const clonedObject = { ...originalObject };              

    for (const path of keysToOmit) {                

      delete clonedObject[path]       

    }           

    return clonedObject;

}

​

function omit4(obj, keys) {

  var target = {};

  for (var i in obj) {

    if (keys.indexOf(i) >= 0) continue;

    if (!Object.prototype.hasOwnProperty.call(obj, i)) continue;

    target[i] = obj[i];

  }

  return target;

}

​

function omitProd(src) {

    if (!src || typeof src !== 'object') return {};

​

    const clonedObject = { ...src };

    let idx = 0;

    let propsList = arguments;

​

    if (Array.isArray(propsList[1])) {

        propsList = propsList[1];

        idx = -1;

    }

​

    const len = propsList.length;

​

    while (++idx < len) {

        const key = propsList[idx];

​

        delete clonedObject[key];

    }

​

    return clonedObject;

}

​

function getRandomInt(min, max) {

  min = Math.ceil(min);

  max = Math.floor(max);

  return Math.floor(Math.random() * (max - min) + min); //The maximum is exclusive and the minimum is inclusive

}

​

​

var data = [];

​

for (let i = 0; i < 10000; i++) {

    const obj = {};

    const propsCount = getRandomInt(0, 10);

    for (let j = 0; j < propsCount; j++) {

        const propCode = getRandomInt(97, 122);

        obj[String.fromCharCode(propCode)] = propCode;

    }

    data.push(obj);

}