Run results for: Arrays into Object, reduce vs for #4

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.67 Safari/537.36

Browser: Chrome 87

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
reduce	0.1 Ops/sec
for	35.6 Ops/sec

Script Preparation code:

var ppl = []
for(var i=0; i<100000; i++) {
	ppl.push({ id: i, name: i+"" }) 
}

AخA
 
var ppl = []for(var i=0; i<100000; i++) {    ppl.push({ id: i, name: i+"" }) }

Tests:

var byId = ppl.reduce((stored, current) => ({ ...stored, [current.id]: current }), {});

 
var byId = ppl.reduce((stored, current) => ({ ...stored, [current.id]: current }), {});

var byId = {}
for(var i=0;i<ppl.length;i++) {
  byId[ppl[i].id] = ppl[i]
}

 
var byId = {}for(var i=0;i<ppl.length;i++) {  byId[ppl[i].id] = ppl[i]}