filterEmptyArrays.js

console.time('file')

console.log('Do the things')
const listToFilter = [3, 5, '', null, 'yes', 'keep']
const limit = 10000000
let filteredList

console.log('Array size:', listToFilter.length, listToFilter)
console.log('Iterations:', limit)

let n = 0
console.time('Filter empty items from list using n => n')
while(n < limit) {
  filteredList = listToFilter.filter(n => n)
  n++
}
console.timeEnd('Filter empty items from list using n => n')

n = 0
console.time('Filter empty items from list using n=>n')
while(n < limit) {
  filteredList = listToFilter.filter(n=>n)
  n++
}
console.timeEnd('Filter empty items from list using n=>n')

function filterEmpty(n) {
  return n
}

n = 0
console.time('Filter with predefined filterEmpty function')
while(n < limit) {
  filteredList = listToFilter.filter(filterEmpty)
  n++
}
console.timeEnd('Filter with predefined filterEmpty function')

n = 0
console.time('Filter empty items from list using Boolean')
while(n < limit) {
  filteredList = listToFilter.filter(Boolean)
  n++
}
console.timeEnd('Filter empty items from list using Boolean')

console.timeEnd('file')