Run results for: String Union Predicates

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36

Browser: Chrome 94

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Array.includes	597597.2 Ops/sec
Set.has	506829.9 Ops/sec
switch	1168141.9 Ops/sec

Script Preparation code:

var roles = ['owner', 'writer', 'reader', 'freeBusyReader'];
var roleSet = new Set(roles);


function isRoleA(str) {
   return roles.includes(str);
}

function isRoleS(str) {
   return roleSet.has(str);
}

function isRoleSw(str) {
   switch (str) {
      case 'owner':
      case 'writer':
      case 'reader':
      case 'freeBusyReader':
         return true;
      default:
         return false;
   };
}


var testees = ['owner', 'writer', 'reader', 'freeBusyReader', 'ower', 'wrer', 'reer', 'freeBueader',]

Tests:

Array.includes
const rA = testees.map(s => isRoleA(s));
Set.has
const rS = testees.map(s => isRoleS(s));
switch
const rSw = testees.map(s => isRoleSw(s));

Run results for: String Union Predicates

Array.includes

Set.has

switch