[smallestCommonMultiple]my code works but the infinite loop detector is detecting it

[antonl05]

the infinite loop detector is finding my code to be bad.
when it takes large numbers it iterates a lot thus tests fail
i checked this and it works for [1,13] in online nodejs compiler

function flip(arr){
  let result = []
  for(let i=arr.length-1;i>=0;i--){
    result.push(arr[i])
  } return result }
function expand(arr){
  let result =[]
  for(let i=arr[0];i<=arr[1];i++){
    result.push(i)
  } return result }
function symGetLCM(num1, num2){
  if(num1==num2){return num1}
  let arr1 = []
  let arr2 = []
  let stopWhen = 2
  for(let i=1;i<stopWhen;i++){
    arr1.push(num1*i)
    arr2.push(num2*i)
    if(num1>num2){
      if(arr1.includes(arr2[arr2.length-1])){
        return arr2[arr2.length-1]}
      else{stopWhen++}}
    else{
        if(arr2.includes(arr1[arr1.length-1])){
        return arr1[arr1.length-1]}
        else{stopWhen++}}
  }
}
function smallestCommons(arr) {
  if(arr[0]>arr[1]){arr = flip(arr)}
  arr = expand(arr)
  let result = symGetLCM(arr[0],arr[1])
  for(let i=2;i<arr.length;i++){
    result = symGetLCM(result,arr[i])
  } return result
}

this is the section

i think this was meant to be a feature but now its a bug

[JeremyLT]

It is an indication that your solution is too slow. You need to look for ways to make your solution less inefficient.