Run results for: spread vs non spread

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser: Chrome 122

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
spread	53.6 Ops/sec
non spread	2014.9 Ops/sec

Script Preparation code:

	var rows = []
	for (let i = 0; i < 10000; i++) {
		rows.push(i)
	}

​x
 
​    var rows = []    for (let i = 0; i < 10000; i++) {        rows.push(i)    }

Tests:

	var res = rows.reduce(
		(acc, curr) => ({
			...acc,
			[curr]: curr,
		}),
		{}
	)

 
    var res = rows.reduce(        (acc, curr) => ({            ...acc,            [curr]: curr,        }),        {}    )

	var res = {}
	for (let i = 0; i < rows.length; i++) {
		res[i] = i
	}

 
    var res = {}    for (let i = 0; i < rows.length; i++) {        res[i] = i    }