Run results for: Recursion vs Iteration

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_0_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/19A404 [FBAN/FBIOS;FBDV/iPhone13,4;FBMD/iPhone;FBSN/iOS;FBSV/15.0.2;FBSS/3;FBID/phone;FBLC/ru_RU;FBOP/5]

Browser: Mobile Safari 15

Operating system: iOS 15.0.2

Device Platform: Mobile

Date tested: 2 years ago

Test name	Executions per second
recursion	1829980.0 Ops/sec
while loop	12101760.0 Ops/sec
for loop	11840230.0 Ops/sec

Script Preparation code:

  var nums = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
  
  function sum_recurse(arr, i) {
   i = i || 0;
   if (i > arr.length)
     return 0;
   else
     return arr[i] + sum_recurse(arr, i + 1);
  }
  
  function sum_while(arr) {
   var total = 0,
       i = 0,
       len = arr.length;
  
   while (i < len) {
    total += arr[i++];
   }
  
   return total;
  }
  
  function sum_for(arr) {
   var total = 0,
       len = arr.length;
  
   for (var i = 0; i < len; i++) {
    total += arr[i];
   }
  
   return total;
  }

Tests:

recursion
sum_recurse(nums)
while loop
sum_while(nums)
for loop
sum_for(nums)

Run results for: Recursion vs Iteration

recursion

while loop

for loop