perfm

index.js

function index1(value) {
   return (new Array(1,2,3)).indexOf(value);
}

function index2(value) {
   return [1,2,3].indexOf(value);
}

function index3(value) {
   function index(value) {
      return (new Array(1,2,3)).indexOf(value);
   }

   return index(value);
}


function index4(value) {
   function index(value) {
      return [1,2,3].indexOf(value);
   }

   return index(value);
}

function index5(value) {
   var arr = new Array(1,2,3);
   
   function index(value) {
      return arr.indexOf(value);
   }

   return index(value);
}


function index6(value) {
   var arr = [1, 2, 3];
   function index(value) {
      return arr.indexOf(value);
   }

   return index(value);
}

function index7(value) {
   var arr = new Array(1,2,3);
   
   function index(arr, value) {
      return arr.indexOf(value);
   }

   return index(arr, value);
}

function index8(value) {
   var arr = [1,2,3];
   
   function index(arr, value) {
      return arr.indexOf(value);
   }

   return index(arr, value);
}

function test(fns) {
   var i = 0,
       fn,
       name;

   while (fn = fns[i]) {
       name = fn.name + '_' + i;
       console.time(name);

       for (var j = 0; j < 5000000; j++) {
           fn(2);
       }

       console.timeEnd(name);

      i += 1;
   }
}

test([index1, index2, index3, index4, index5, index6, index7, index8]);

result.md

$ node -v v4.3.1

• index1_0: 110ms
• index2_1: 48ms
• index3_2: 523ms
• index4_3: 10330ms
• index5_4: 469ms
• index6_5: 323ms
• index7_6: 425ms
• index8_7: 290ms

Chrome 48.0.2564.116 m (64-bit)
index1_0: 139.270ms
index2_1: 57.373ms
index3_2: 721.241ms
index4_3: 930.062ms
index5_4: 688.851ms
index6_5: 494.212ms
index7_6: 596.103ms
index8_7: 455.884ms

node -v 5.5.0
index1_0: 107.066ms
index2_1: 43.291ms
index3_2: 505.220ms
index4_3: 12536.065ms
index5_4: 449.090ms
index6_5: 305.469ms
index7_6: 405.998ms
index8_7: 285.871ms

node -v v6.2.1
index1_0: 207.533ms
index2_1: 76.937ms
index3_2: 974.188ms
index4_3: 1283.026ms
index5_4: 835.188ms
index6_5: 626.149ms
index7_6: 751.602ms
index8_7: 551.675ms
тест с ноута, примерно делить на 2 можно^^