Run results for: Multiply vs subtract

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:109.0) Gecko/20100101 Firefox/113.0

Browser: Firefox 113

Operating system: Windows 7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Multiply	4885.9 Ops/sec
Subtract	6025.8 Ops/sec

Script Preparation code:

const length = 100000;
const tmp_nums=[];
for (let i = 0; i < length; i++) {
  tmp_nums.push(Date.now() + Math.random());
}
nums = [...tmp_nums];
nums_len = length;

Tests:

Multiply
const length = nums_len; for (let i = 0; i < length; i++) { nums[i] = nums[i] * -1; }
Subtract
const length = nums_len; for (let i = 0; i < length; i++) { nums[i] = 0 - nums[i]; }

Run results for: Multiply vs subtract

Is it faster to make a number negative by multiplying by negative one, og subtract the number from zero.

Multiply

Subtract