Run results for: Lodash omit vs es6 rest spread vs for-in-loop

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36

Browser: Chrome 85

Operating system: Mac OS X 10.15.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
lodash omit for 3 keys	463232.1 Ops/sec
native for in loop for 3 keys	3403710.2 Ops/sec
lodash omit for 2 keys	493967.1 Ops/sec
native for in loop for 2 keys	3154813.5 Ops/sec
lodash omit for 1 keys	544124.1 Ops/sec
native for in loop for 1 keys	2936519.8 Ops/sec

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js'></script>

Script Preparation code:

var allHeaders = {
  'Accept-Encoding': 'gzip,deflate',
  'Accept-Language': 'en-US',
  'Content-Type': 'application/json',
  'User-Agent': `(compatible; Mozilla/5.0; MSIE 9.0; Trident/5.0;})`,
  'Proxy-Connection': 'Keep-Alive',
  Connection: 'Keep-Alive',
  Accept: 'application/hal+json, application/json',
};

function omit(obj, keys) {
  var result = {};
  for (let i in obj) {
    if (keys.indexOf(i) >= 0) continue;
    result[i] = obj[i];
  }
  return result;
}

Tests:

lodash omit for 3 keys
_.omit(allHeaders, ['Accept-Encoding', 'User-Agent', 'Connection']);
native for in loop for 3 keys
omit(allHeaders, ['Accept-Encoding', 'User-Agent', 'Connection']);
lodash omit for 2 keys
_.omit(allHeaders, ['Accept-Encoding', 'Connection']);
native for in loop for 2 keys
omit(allHeaders, ['Accept-Encoding', 'Connection']);
lodash omit for 1 keys
_.omit(allHeaders, ['Connection']);
native for in loop for 1 keys
omit(allHeaders, ['Connection']);

Run results for: Lodash omit vs es6 rest spread vs for-in-loop

lodash omit for 3 keys

native for in loop for 3 keys

lodash omit for 2 keys

native for in loop for 2 keys

lodash omit for 1 keys

native for in loop for 1 keys