Run results for: For loop

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36

Browser: Chrome 88

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
NB	266756.4 Ops/sec
RK	280906.8 Ops/sec

Script Preparation code:

var initialMembers = new Map([
	[0, 'xxx'],
	[1, 'xxx'],
	[2, 'xxx'],
	[3, 'xxx'],
	[4, 'xxx'],
	[5, 'xxx'],
	[6, 'xxx'],
	[7, 'xxx'],
	[8, 'xxx'],
	[9, 'xxx'],
	[10, 'xxx'],
	[11, 'xxx'],
	[12, 'xxx'],
	[13, 'xxx'],
	[14, 'xxx'],
	[15, 'xxx'],
	[16, 'xxx'],
	[17, 'xxx'],
	[18, 'xxx'],
	[19, 'xxx'],
	[10, 'xxx'],
	[21, 'xxx'],
	[22, 'xxx'],
	[23, 'xxx'],
	[24, 'xxx'],
	[25, 'xxx'],
	[26, 'xxx'],
	[27, 'xxx'],
	[28, 'xxx'],
	[29, 'xxx'],
	[30, 'xxx'],
	[31, 'xxx'],
	[32, 'xxx'],
	[33, 'xxx'],
	[34, 'xxx'],
	[35, 'xxx'],
	[36, 'xxx'],
	[37, 'xxx'],
	[38, 'xxx'],
	[39, 'xxx'],
	[40, 'xxx'],
	[41, 'xxx'],
	[42, 'xxx'],
	[43, 'xxx'],
	[44, 'xxx'],
	[45, 'xxx'],
	[46, 'xxx'],
	[47, 'xxx'],
	[48, 'xxx'],
	[49, 'xxx']
]);

function getInitialMembers(from, total)
{
  var hasMember = true;
  var members = [];

  for (var i = from, to = from + total; (i < to) && hasMember; i++)
  {
    if (initialMembers.has(i))
    {
      members.push(initialMembers.get(i));
    }
    else
    {
      hasMember = false;
    }
  }

  return members;
};

function getInitialMembersRK(from, total)
{
  var hasMember = true;
  var members = [];

    for (var i = from, to = from + total; i < to; i++)
    {
        if (!initialMembers.has(i))
        {
            break;
        }
        
        members.push(initialMembers.get(i));
    }


  return members;
};

Tests:

NB
var memb = getInitialMembers(13, 24);
RK
var memb = getInitialMembersRK(13, 24);

RK

NB

RK