Description:
------------
for() terribly poor performance

Test script:
---------------
// --- php

<?php
 $t=microtime(true);

 $s=0;
 for($i=0;$i<20000000;$i++){
  $s+=$i;
 }

 $t=microtime(true)-$t;

 print(($t*1000).'ms');
?>



// --- javascript

<script>
 t=new Date();

 s=0;
 for(i=0;i<20000000;i++){
  s+=i
 }

 t=new Date()-t;

 document.write(t+'ms');
</script>



// --- C#

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {

            int t = Environment.TickCount;

            long s = 0;

            for (int i = 0; i < 20000000; i++)
            {
                s += i;
            }

            t = Environment.TickCount - t;

            Console.WriteLine(t+"ms");
            Console.ReadKey();
        }
    }
}

Expected result:
----------------
Performance at the level of other languages.

Actual result:
--------------
PHP 8.0alpha2: 343ms 
PHP 7.4: 461ms
javascript (Firefox 78.0.2): 58ms
C#: 16ms