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_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser: Chrome 137

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

native for in loop for 3 keys

13.7M/s

native for in loop for 2 keys

13.1M/s

native for in loop for 1 keys

12.3M/s

lodash omit for 1 keys

2.3M/s

lodash omit for 2 keys

2.0M/s

lodash omit for 3 keys

1.9M/s

View exact numbers

Test name	Executions per second
✓ native for in loop for 3 keys	13,743,895 Ops/sec
native for in loop for 2 keys	13,080,292 Ops/sec
native for in loop for 1 keys	12,341,044 Ops/sec
lodash omit for 1 keys	2,250,251 Ops/sec
lodash omit for 2 keys	2,021,672 Ops/sec
lodash omit for 3 keys	1,881,255 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']);