Run results for: Current vs suggestions

Run details:

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:106.0) Gecko/20100101 Firefox/106.0

Browser: Firefox 106

Operating system: Ubuntu

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
Current	361.1 Ops/sec
Optimize option 1	2922.6 Ops/sec
Optimize option 2	25092.5 Ops/sec

Script Preparation code:

var teams = [];
var filterTeams = [];


for (var i = 0; i < 1000; i++) {
  var teamUsers = [];
  for (var j = 0; j < 1000; j++) {
    Math.random() > 0.5 && teamUsers.push({userId: j});
  }
  teams.push({
    teamUsers: teamUsers
  });
  
  Math.random() > 0.5 && filterTeams.push(i);
}

var userId = 999;

Tests:

Current
var tempResult = teams .filter((team) => filterTeams.some((teamId) => teamId === team.id)) .some((team) => team.teamUsers.some((teamUser) => teamUser.userId === userId));
Optimize option 1
var tempResult = teams .filter((team) => filterTeams.includes(team.id)) .some((team) => team.teamUsers.some((teamUser) => teamUser.userId === userId));
Optimize option 2
var tempResult = teams .filter((team) => ~filterTeams.indexOf(team.id)) .some((team) => team.teamUsers.some((teamUser) => teamUser.userId === userId));

Run results for: Current vs suggestions

Current

Optimize option 1

Optimize option 2