Run results for: Increment array with for( ... Object.Entries(...) ) vs Object.Entries(...).reduce

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36

Browser: Chrome 76

Operating system: Mac OS X 10.14.6

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
for	1572057.9 Ops/sec
reduce	1494075.6 Ops/sec

Script Preparation code:

var hashmap = {
      id1: {
        id: 'id1',
        content: ''
      },
      id2: {
        id: 'id2',
        content: ''
      },
      id3: {
        id: 'id3',
        content: ''
      }
 };

Tests:

for
const newhashmap = {} for (const [key, value] of Object.entries(hashmap)) { newhashmap[key] = value; }
reduce
const newhashmap = Object.entries(hashmap).reduce((acc, [key, value]) => { const _acc = {...acc}; _acc[key] = value; return _acc }, {});