Benchmark: Array find middle

Script Preparation code:

function test1(array) {
	for (let i = 0; i < array.length; i++) {
		let lsum = array.slice(0, i).reduce((carry, value) => carry + value, 0);
		let rsum = array.slice(i).reduce((carry, value) => carry + value, 0);
		if (lsum === rsum) return i;
	}
	return -1;
}

function test2(array) {
	let sum = array.reduce((carry, value) => carry + value, 0);
	for (let i = 0, lsum = 0, rsum = sum; i < array.length; i++, lsum += array[i - 1], rsum -= array[i - 1]) {
		if (lsum === rsum) {
			return i;
		}
	}
	return -1;
}

Tests:

function 1
test1([1, 5, -8, 0, -2]); test1([-2, 2, 5]); test1([1, 1, 1, 1, -4]);
function 2
test2([1, 5, -8, 0, -2]); test2([-2, 2, 5]); test2([1, 1, 1, 1, -4]);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
function 1
function 2

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:103.0) Gecko/20100101 Firefox/103.0

Browser/OS: Firefox 103 on Windows 8.1

View result in a separate tab

Test name	Executions per second
function 1	428923.5 Ops/sec
function 2	2408855.0 Ops/sec

Array find middle (version: 0)

Comparing performance of: function 1 vs function 2

Created: one year ago by: Guest

Jump to the latest result

function 1

function 2

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A