Run results for: Generate Date In A Month

Test name	Executions per second
✓ new Array	14,870 Ops/sec
Array	14,688 Ops/sec
While	14,436 Ops/sec
Array From	14,243 Ops/sec
for index	12,941 Ops/sec
for push	12,896 Ops/sec

Array From

function createDateArrayInAMonth(year, month) {
    return Array.from(
        { length: new Date(year, month, 0).getDate() },
        (_, i) => new Date(year, month - 1, i + 1).toLocaleString()
    )
}

createDateArrayInAMonth(2023, 10)

new Array

function createDateArrayInAMonth(year, month) {
    return new Array(new Date(year, month, 0).getDate()).fill().map((_, i) => new Date(year, month - 1, i + 1).toLocaleString())
}

createDateArrayInAMonth(2023, 10)

Array

function createDateArrayInAMonth(year, month) {
    return Array(new Date(year, month, 0).getDate()).fill().map((_, i) => new Date(year, month - 1, i + 1).toLocaleString())
}

createDateArrayInAMonth(2023, 10)

for push

function createDateArrayInAMonth(year, month) {
    const arr = []
    
    for (let i = 0; i < new Date(year, month, 0).getDate(); i++) {
      arr.push(new Date(year, month - 1, i + 1).toLocaleString())
    }
    
  return arr
}

createDateArrayInAMonth(2023, 10)

for index

function createDateArrayInAMonth(year, month) {
    const arr = []
    
    for (let i = 0; i < new Date(year, month, 0).getDate(); i++) {
      arr[i] = new Date(year, month - 1, i + 1).toLocaleString()
    }
    
  return arr
}

createDateArrayInAMonth(2023, 10)

While

function createDateArrayInAMonth(year, month) {
    const date = new Date(year, month - 1, 1)
    const arr = []
    
    while (date.getMonth() === month - 1) {
      arr.push(new Date(date).toLocaleString())
      
      date.setDate(date.getDate() + 1)
    }
  
  return arr
}

createDateArrayInAMonth(2023, 10)