Run results for: Math.floor(N) vs (N | 0) vs parseInt(N)

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:127.0) Gecko/20100101 Firefox/127.0

Browser: Firefox 127

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 2 years ago

(N | 0)

156/s

parseInt(N)

113/s

Math.floor(N)

107/s

View exact numbers

Script Preparation code:

var len = 10000000
var nums = Array(len)
    .fill()
    .map(() => Math.random() * 10000)

Tests:

Math.floor(N)
for (let i = 0; i < len; i++) { const result = Math.floor(nums[i]) }
(N | 0)
for (let i = 0; i < len; i++) { const result = nums[i] | 0 }
parseInt(N)
for (let i = 0; i < len; i++) { const result = parseInt(nums[i]) }