Run results for: tewgwggweg

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:58.0) Gecko/20100101 Firefox/58.0

Browser: Firefox 58

Operating system: Windows

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
Array.indexOf()	3341791.2 Ops/sec
For loop	16924544.0 Ops/sec
For loop without break	14566753.0 Ops/sec
Array.indexOf() reversed	11471107.0 Ops/sec
Array.includes()	3083388.5 Ops/sec

Script Preparation code:

var array1 = 
[
  "value1",
  "value2",
  "value3",
  "value4",
  "value5",
  "value6",
  "value7",
  "value8",
  "value9",
  "value10",
  "value11",
  "value12",
  "value13",
  "value14",
  "value15",
  "value16",
  "value17",
  "value18",
  "value19",
  "value20"
];
var array2 =
[
  "value1",
  "value10",
  "value20"
];

Tests:

Array.indexOf()
for(var i = 0, len = array1.length; i < len; i++) { var value = array1[i]; var result = (array2.indexOf(value) !== -1); }
For loop
for(var i = 0, len = array1.length; i < len; i++) { var value = array1[i]; var result = false; for(var j = 0, len = array2.length; j < len; j++) { if(value === array2[j]) { result = true; break; } } }
For loop without break
for(var i = 0, len = array1.length; i < len; i++) { var value = array1[i]; var result = false; for(var j = 0, len = array2.length; j < len; j++) { if(value === array2[j]) { result = true; } } }
Array.indexOf() reversed
for(var i = 0, len = array2.length; i < len; i++) { var value = array2[i]; var result = (array1.indexOf(value) !== -1); }
Array.includes()
for(var i = 0, len = array1.length; i < len; i++) { var result = array2.includes(array1[i]); }

Run results for: tewgwggweg

gwegwgw

Array.indexOf()

For loop

For loop without break

Array.indexOf() reversed

Array.includes()